CN114246043B

CN114246043B - Tomato fertilization correction method and device based on soil and plant detection

Info

Publication number: CN114246043B
Application number: CN202210002167.6A
Authority: CN
Inventors: 高进华; 张焕菊; 张广忠; 徐勤政; 陈永法; 宋兆云; 刘飞; 解学仕; 杨恒哲; 白静
Original assignee: Stanley Agricultural Group Co Ltd
Current assignee: Stanley Agricultural Group Co Ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2023-01-31
Anticipated expiration: 2042-01-04
Also published as: CN114246043A

Abstract

The invention provides a tomato fertilization correction method based on soil and plant detection, which comprises the following steps: in the tomato land preparation and fertilization stage, basic application amounts of a nitrogen fertilizer, a phosphate fertilizer and a potassium fertilizer in a tomato base fertilizer, a plurality of first correction coefficients and a plurality of second correction coefficients are obtained, and corrected application amounts of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the tomato base fertilizer are calculated; in the tomato seedling stage, acquiring the total nitrogen content of the tomato seedling stage leaves and the basic application amount of the tomato seedling stage top dressing nitrogen fertilizer, and calculating the corrected application amount of the tomato seedling stage top dressing nitrogen fertilizer; in the stage of top dressing of the first blossom and the full bearing stage of the tomatoes, the basic application amount of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer in the first blossom and the full bearing stage of the tomatoes and the total nitrogen content, total phosphorus content and total potassium content of leaves in the first blossom and the full bearing stage of the tomatoes are obtained, and the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first blossom and the full bearing stage of the tomatoes is calculated.

Description

Tomato fertilization correction method and device based on soil and plant detection

Technical Field

The invention relates to the technical field of accurate fertilization, in particular to a tomato fertilization correction method and device based on soil and plant detection.

Background

China is a country with the largest tomato planting area and the largest yield in the world, and the annual yield is about 5500 ten thousand tons and accounts for about 7 percent of the total amount of vegetables. The tomatoes are various in variety and strong in adaptability, can be planted in the south and the north, are high in nutritional value and economic value, and are one of the main planted vegetables in China.

Tomatoes belong to crops which bloom, bear fruits and are harvested continuously, and the high quality and high yield can be obtained only by coordinating the contradiction between vegetative growth and reproductive growth in the planting process. Under the influence of factors such as cultivation modes, geographical environments, management levels, tomato crops and the like, different areas in China have great difference in tomato fertilization management, and tomato yield and quality also have great level fluctuation. On the whole, the following defects exist in the aspect of current tomato fertilization management: firstly, fertilization is blind, the absorption of the tomatoes on nutrients is influenced by a plurality of environmental factors such as light, temperature, water, air, soil and the like, but in actual production, farmers cannot systematically evaluate the influence of the environmental factors on fertilization, so that the condition of too much or too little fertilizer input occurs; secondly, the traditional fertilization basis is difficult to change, and the fertilization basis is an inherent mode formed by farmers in the long-time planting process and is often matched with the local ecological environment and the cultivation basis. The external scientific fertilization technology is often difficult to accept, and the popularization difficulty is high; thirdly, the concept of scientific fertilization still remains in a 'soil testing formula', the attention to dynamic changes in the growth process of tomato plants is less, and the amount of topdressing cannot be flexibly adjusted.

In the prior art, an invention patent 'a tomato fertilization method' with the application number of 201811491131.9 provides a fertilization method based on a tomato nutrition demand rule. The fertilizing method comprehensively considers the requirements of the tomatoes on nutrients in each growth stage, and can effectively supplement medium and trace elements which are easy to ignore in the tomato planting process; the invention patent 'a facility tomato water and fertilizer application method' with the application number of 201711294192.1 provides a fertilizer application method combining organic and inorganic fertilizers and adjusting the usage amount according to the cultivation age of a facility vegetable field. The method can reduce the use amount of inorganic fertilizer and improve the utilization rate of the fertilizer; however, the two fertilizing methods do not consider the influence of factors such as soil and plant growth state on fertilizer utilization, so that the situation of excessive or insufficient fertilization can be caused, the normal growth of tomatoes is further influenced, the fertilizing bases of different areas are not considered, and the popularization and the application are not facilitated. The invention patent with application number 202111063324.6 provides a fertilizer preparation and dosage calculation method based on yield reaction and soil fertility for facility tomatoes, which combines indexes such as yield level, soil nutrient supply, tomato nutrient demand and fertilization yield increase situation of a plot over the years and carries out fertilizer preparation and dosage calculation on the basis of optimal nutrient management of nutrient collaborative optimization, and can scientifically guide the production of the fertilizer special for tomatoes and carry out fertilizer dosage recommendation. The invention patent with the application number of 201610786016.9, a soil testing formula fertilization method based on grey correlation analysis and the invention patent with the application number of 201810468917.2, which are general accurate models for soil testing formula fertilization, take more fertilizer utilization influence factors into consideration, but particularly on a certain crop, the given fertilization suggestions are more general, and particularly on the crop with more fertilization times, a tomato grower cannot be accurately guided to reasonably use fertilizers.

Disclosure of Invention

The invention provides a tomato fertilization correction method and device based on soil and plant detection, which are used for solving the technical problems and optimizing nitrogen, phosphorus and potassium fertilization bases in different areas on the basis of soil and plant tissue detection and by combining a tomato nutrient demand rule and plant growth performance.

The invention provides a tomato fertilization correction method based on soil and plant detection, which comprises the following steps:

in the tomato land preparation and fertilization stage, basic application amounts of a nitrogen fertilizer, a phosphate fertilizer and a potassium fertilizer in a tomato base fertilizer, a plurality of first correction coefficients and a plurality of second correction coefficients are obtained, and corrected application amounts of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the tomato base fertilizer are calculated;

wherein the first correction coefficient is obtained according to a detection value of a fast-acting nutrient in a soil sample, and the fast-acting nutrient is alkaline-hydrolyzed nitrogen, available phosphorus or fast-acting potassium;

the second correction coefficient is obtained according to the EC value in the soil sample;

in the tomato seedling stage, acquiring the total nitrogen content of the tomato seedling stage leaves and the basic application amount of the tomato seedling stage top dressing nitrogen fertilizer, and calculating the corrected application amount of the tomato seedling stage top dressing nitrogen fertilizer;

in the stage of top dressing of the first blossom and the full bearing stage of the tomatoes, the basic application amount of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer in the first blossom and the full bearing stage of the tomatoes and the total nitrogen content, total phosphorus content and total potassium content of leaves in the first blossom and the full bearing stage of the tomatoes are obtained, and the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first blossom and the full bearing stage of the tomatoes is calculated.

Optionally, the first correction factor is obtained according to a detection value of available nutrients in the soil sample, and includes:

obtaining a soil sample before tomato soil preparation and fertilization, and obtaining a detection value of available nutrients of the soil sample;

performing index evaluation on the detection value according to a soil nutrient evaluation standard;

and acquiring a first correction coefficient corresponding to the available nutrients according to the index evaluation result.

Optionally, the obtaining a first correction coefficient corresponding to the available nutrient according to the result of the index evaluation includes:

under the condition that the index evaluation result of the available nutrients is in a medium level, the value of a first correction coefficient corresponding to the available nutrients is 1;

under the condition that the index evaluation result of the available nutrients is high level or low level, performing single-factor variable field test by taking 10% increase and decrease as gradient on the basis of the basic application amount of nitrogen fertilizer, phosphate fertilizer or potassium fertilizer in the base fertilizer of the tomato;

and performing data statistical analysis on the tomato yield and quality obtained by the field test, and taking the maximum reduction amplitude or the minimum increase amplitude of which the difference between the tomato yield and quality obtained by fertilizing according to the basic application amount of a nitrogen fertilizer, a phosphate fertilizer or a potassium fertilizer in the base fertilizer of the tomato and the tomato quality is smaller than a preset threshold value as the value of a first correction coefficient corresponding to the available nutrients.

Optionally, the calculating the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the tomato base fertilizer comprises:

acquiring the corrected application amount of the nitrogen fertilizer in the tomato base fertilizer according to the product of the first correction coefficient corresponding to the alkaline hydrolysis nitrogen and the basic application amount and the second correction coefficient of the nitrogen fertilizer in the tomato base fertilizer;

obtaining the corrected application amount of the phosphate fertilizer in the tomato base fertilizer according to the product of the first correction coefficient corresponding to the effective phosphorus and the basic application amount of the phosphate fertilizer in the tomato base fertilizer;

and acquiring the corrected application amount of the potassium fertilizer in the tomato base fertilizer according to the product of the first correction coefficient corresponding to the quick-acting potassium and the basic application amount and the second correction coefficient of the potassium fertilizer in the tomato base fertilizer.

Optionally, the calculating of the corrected application amount of the tomato seedling stage topdressing nitrogen fertilizer comprises:

determining a target value of the total nitrogen content in the leaves of the tomato in the seedling stage;

comparing the total nitrogen content of the tomato seedling stage leaves with the target value;

determining the proportion of increasing or decreasing the nitrogen fertilizer according to the comparison result;

and calculating the corrected application amount of the tomato seedling stage topdressing nitrogen fertilizer according to the proportion on the basis of the basic application amount of the tomato seedling stage topdressing nitrogen fertilizer.

Optionally, the calculating of the corrected application amounts of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first blossom fruit setting period or the full bearing period of the tomato includes:

determining target values corresponding to the total nitrogen content, the total phosphorus content and the total potassium content of the leaves in the first blossom and fruit setting period or full fruit period of the tomato respectively;

comparing the total nitrogen content, total phosphorus content and total potassium content of the leaves in the first flowering and fruit setting period or full fruit period of the tomatoes with target values respectively corresponding to the total nitrogen content, total phosphorus content and total potassium content of the leaves in the first flowering and fruit setting period or full fruit period of the tomatoes;

determining a plurality of proportions of increasing or decreasing nitrogen fertilizer, increasing or decreasing phosphate fertilizer and increasing or decreasing potassium fertilizer according to the comparison result;

and calculating the corrected application amounts of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first flowering fruit setting period or the full fruit period of the tomatoes according to the plurality of proportions on the basis of the basic application amounts of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first flowering fruit setting period or the full fruit period of the tomatoes.

The invention also provides a tomato fertilization correction device based on soil and plant detection, which comprises:

the tomato base fertilizer amount correction module is used for acquiring the basic application amounts of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer in the tomato base fertilizer, a plurality of first correction coefficients and second correction coefficients before land preparation and fertilization of tomatoes, and calculating the corrected application amounts of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer in the tomato base fertilizer;

the tomato seedling stage topdressing correction module is used for acquiring the total nitrogen content of the tomato seedling stage leaves and the basic application amount of the tomato seedling stage topdressing nitrogen fertilizer in the tomato seedling stage and calculating the corrected application amount of the tomato seedling stage topdressing nitrogen fertilizer;

and the top dressing correction module is used for acquiring the basic application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first-flowering fruit setting period or the full-bearing period of the tomato and the total nitrogen content, the total phosphorus content and the total potassium content of the leaves in the first-flowering fruit setting period or the full-bearing period of the tomato in the first-flowering fruit setting period and the full-bearing period of the tomato, and calculating the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first-flowering fruit setting period or the full-bearing period of the tomato.

The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of the tomato fertilization correction method based on soil and plant detection.

The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method for tomato fertilization correction based on soil and plant detection as described in any one of the above.

According to the method and the device for correcting the tomato fertilization based on the soil and plant detection, provided by the invention, the fertilization habits of farmers in different areas are fully considered on the basis of the soil and plant tissue detection in different tomato fertilization stages, and the nitrogen, phosphorus and potassium fertilization bases in different areas are optimized by combining the soil nutrient condition and the tomato leaf nutrient content, so that sufficient nutrients are provided for the growth of tomatoes, excessive application of a chemical fertilizer is avoided, and the effects of flexibly adjusting the fertilization amount of the chemical fertilizer and reducing and increasing the amount of the chemical fertilizer are achieved.

Drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic flow diagram of a method for correcting fertilization of tomatoes based on soil and plant detection provided by the present invention;

FIG. 2 is a schematic structural diagram of a tomato fertilization correction device based on soil and plant detection provided by the invention;

fig. 3 is a schematic structural diagram of an electronic device provided in the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic flow chart of a tomato fertilization correction method based on soil and plant detection provided by the present invention, and as shown in fig. 1, the tomato fertilization correction method based on soil and plant detection comprises: step 110, step 120 and step 130.

Step 110: and in the tomato land preparation and fertilization stage, the basic application amounts of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer in the tomato base fertilizer, a plurality of first correction coefficients and second correction coefficients are obtained, and the corrected application amounts of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer in the tomato base fertilizer are calculated.

And obtaining the first correction coefficient according to the detection value of the available nutrients in the soil sample, wherein the available nutrients are alkaline-hydrolyzed nitrogen, available phosphorus or available potassium.

The second correction coefficient is obtained from the EC value in the soil sample.

According to the embodiment of the invention, in the tomato land preparation and fertilization stage, the basic application amounts of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer in local tomato base fertilizer are obtained according to fertilization habits in different areas.

In the stage of tomato land preparation and fertilization, a plurality of soil sub-samples with the depth of 0-20 cm are taken from a target planting land by adopting a w sampling method before land preparation and fertilization, and the plurality of soil sub-samples are mixed into a soil sample of a mixed sample.

It should be noted that the soil sampling method may be set according to needs, and this is not particularly limited in the embodiment of the present invention.

And (3) conveying the soil sample to a qualified third-party laboratory for detection, and detecting the detection value of the available nutrients in the soil sample, wherein the available nutrients are alkaline-hydrolyzed nitrogen, available phosphorus or available potassium.

And determining a first correction coefficient of a nitrogen fertilizer corresponding to the alkaline hydrolysis nitrogen, a first correction coefficient of a phosphate fertilizer corresponding to the effective phosphorus and a first correction coefficient of a potassium fertilizer corresponding to the quick-acting potassium according to the detection values of the alkaline hydrolysis nitrogen, the effective phosphorus and the quick-acting potassium.

The value of the second correction factor is determined from the EC value in the soil.

For example, in the case of EC >1ms/cm, the value of the second correction coefficient is equal to 2-EC; under the condition that EC is more than or equal to 0.4ms/cm and more than or equal to 1ms/cm, the value of the second correction coefficient is equal to 1; in the case of EC <0.4ms/cm, the value of the second correction coefficient is equal to 1.4-EC.

It should be noted that, the rule for determining the value of the second correction coefficient according to the EC value in the soil may be set as needed, and this is not specifically limited in the embodiment of the present invention.

According to the embodiment of the invention, the corrected application amounts respectively corresponding to the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the tomato base fertilizer are calculated through the obtained basic application amounts of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the tomato base fertilizer, the first correction coefficient of the nitrogen fertilizer, the first correction coefficient of the phosphate fertilizer, the first correction coefficient of the potassium fertilizer and the second correction coefficient of the potassium fertilizer.

performing index evaluation on the detection value according to soil nutrient evaluation criteria;

According to the embodiment of the invention, before the tomato is subjected to land preparation and fertilization, the soil sample of the target planting plot is obtained, the soil sample is sent to a qualified third-party laboratory for detection, and the detection value of the available nutrients in the soil sample is obtained.

And evaluating the detection value of the available nutrients according to the soil nutrient evaluation standard, and calculating a first correction coefficient corresponding to the available nutrients according to the evaluation result.

According to the embodiment of the invention, the first correction coefficient corresponding to each available nutrient is calculated on the basis of the numerical value of the available nutrient in the soil sample according to the numerical value of the available nutrient in the soil sample obtained by detection, so that the corrected application amount of the chemical fertilizer calculated by using the first correction coefficient can be flexibly adjusted according to the soil fertility levels of different areas, and the corrected application amount of the chemical fertilizer according to the soil fertility levels of different areas is obtained.

under the condition that the index evaluation result of the available nutrients is at a high level or a low level, performing a single-factor variable field test by taking 10% increase and decrease as a gradient on the basis of the basic application amount of a nitrogen fertilizer, a phosphate fertilizer or a potassium fertilizer in the base fertilizer of the tomato;

In the embodiment of the invention, under the condition that the index evaluation result of the available nutrients is in a medium level, the first correction coefficient value corresponding to the available nutrients is 1, and a field test is not required.

Under the condition that the index evaluation result of the available nutrients is at a high level or a low level, on the basis of the basic application amount of a nitrogen fertilizer, a phosphate fertilizer or a potassium fertilizer in the base fertilizer of the tomato, a single-factor variable field test is carried out by taking 10% increase and decrease as a gradient.

For example, the index evaluation result of the available potassium of the available nutrient is high level, the available potassium index is selected to be high level, and a plurality of plots with the alkali-hydrolyzable nitrogen index evaluation and the available phosphorus index evaluation being medium level are used as the test plots of the field test.

On the basis of the basic application amount of the potassium fertilizer in the tomato base fertilizer, by taking 10 percent decrement as a gradient, 6 gradients are designed, namely, the multiple test plots are fertilized by using 100 percent of the basic application amount of the potassium fertilizer in the tomato base fertilizer, 90 percent of the basic application amount of the potassium fertilizer in the tomato base fertilizer, 80 percent of the basic application amount of the potassium fertilizer in the tomato base fertilizer, 70 percent of the basic application amount of the potassium fertilizer in the tomato base fertilizer, 60 percent of the basic application amount of the potassium fertilizer in the tomato base fertilizer and 50 percent of the basic application amount of the potassium fertilizer in the tomato base fertilizer.

For example, the index evaluation result of the available potassium of the available nutrient is at a low level, a plurality of plots with the available potassium index evaluated as the low level and the alkaline nitrogen index evaluation and the available phosphorus index evaluated as the medium level are selected as the test plots of the field test.

On the basis of the basic application amount of the potassium fertilizer in the tomato base fertilizer, 6 gradients are designed by taking 10% increment as a gradient, namely, the multiple test plots are fertilized by using 100% of the basic application amount of the potassium fertilizer in the tomato base fertilizer, 110% of the basic application amount of the potassium fertilizer in the tomato base fertilizer, 120% of the basic application amount of the potassium fertilizer in the tomato base fertilizer, 130% of the basic application amount of the potassium fertilizer in the tomato base fertilizer, 140% of the basic application amount of the potassium fertilizer in the tomato base fertilizer and 150% of the basic application amount of the potassium fertilizer in the tomato base fertilizer.

The amount of increase and decrease may be set as needed, for example, an amount of increase and decrease of 5% may be used as a gradient, and an amount of increase and decrease of 20% may be used as a gradient, which is not particularly limited in the embodiment of the present invention.

It should be noted that the number of gradients may be set according to needs, for example, 4 gradients and 3 gradients are designed, and this is not particularly limited in the embodiment of the present invention.

During the test period of a plurality of test plots, the application rates of the nitrogen fertilizer and the phosphate fertilizer are all referred to the basic application rates of the nitrogen fertilizer and the phosphate fertilizer in the base fertilizer of the tomatoes, the application rates of the nitrogen fertilizer and the phosphate fertilizer are kept unchanged, and the single-factor variable field test is realized.

According to the embodiment of the invention, data statistics and analysis are carried out on the tomato yield and quality obtained by field tests, and the maximum reduction amplitude or the minimum increase amplitude of the difference between the tomato yield and quality obtained by fertilizing according to the basic application amount of a nitrogen fertilizer, a phosphate fertilizer or a potassium fertilizer in the base fertilizer of the tomato and the tomato quality obtained by fertilizing according to the basic application amount of the nitrogen fertilizer, the phosphate fertilizer or the potassium fertilizer in the base fertilizer of the tomato is smaller than a preset threshold value is used as the value of the first correction coefficient corresponding to the quick-acting nutrients.

For example, the tomato yield and quality of the test plot fertilized with the basic application amount of the potassium fertilizer in the 80% tomato base fertilizer is the maximum reduction amplitude of which the difference between the tomato yield and quality obtained by fertilizing according to the basic application amount of the potassium fertilizer in the tomato base fertilizer is smaller than the preset threshold value, and the value of the first correction coefficient corresponding to the quick-acting potassium is 0.8.

In the embodiment of the invention, the product of the first correction coefficient of the nitrogen fertilizer corresponding to the alkaline hydrolysis nitrogen, the basic application amount of the nitrogen fertilizer in the tomato base fertilizer and the second correction coefficient is used as the value of the corrected application amount of the nitrogen fertilizer in the tomato base fertilizer.

For example, tdn = Txn f1 f2,

wherein Tdn is the corrected application amount of the nitrogen fertilizer in the tomato base fertilizer, txn is the basic application amount of the nitrogen fertilizer in the tomato base fertilizer, f1 is a first correction coefficient of the nitrogen fertilizer corresponding to alkaline hydrolysis nitrogen, and f2 is a second correction coefficient.

And taking the product of the first correction coefficient of the phosphate fertilizer corresponding to the effective phosphorus and the basic application amount of the phosphate fertilizer in the tomato base fertilizer as the value of the corrected application amount of the phosphate fertilizer in the tomato base fertilizer.

For example, tdp = Txp f1,

the method comprises the following steps of obtaining a base fertilizer of the tomato, wherein Tdp is a corrected application amount of a phosphate fertilizer in the base fertilizer of the tomato, txp is a basic application amount of the phosphate fertilizer in the base fertilizer of the tomato, and f1 is a first correction coefficient of the phosphate fertilizer corresponding to available phosphorus.

And taking the product of the first correction coefficient of the potash fertilizer corresponding to the quick-acting potassium and the basic application amount and the second correction coefficient of the potash fertilizer in the tomato base fertilizer as the value of the corrected application amount of the potash fertilizer in the tomato base fertilizer.

For example, tdk = Txk f1 f2,

wherein Tdk is the corrected application amount of the potassium fertilizer in the tomato base fertilizer, txk is the basic application amount of the potassium fertilizer in the tomato base fertilizer, f1 is the first correction coefficient of the potassium fertilizer corresponding to the quick-acting potassium, and f2 is the second correction coefficient.

Step 120: and in the tomato seedling stage, acquiring the total nitrogen content of the tomato seedling stage leaves and the basic application amount of the tomato seedling stage top dressing nitrogen fertilizer, and calculating the corrected application amount of the tomato seedling stage top dressing nitrogen fertilizer.

In the embodiment of the invention, in the tomato seedling stage, according to the total nitrogen content of the leaves in the tomato seedling stage, on the basis of the basic application amount of the top dressing nitrogen fertilizer in the tomato seedling stage, the corrected application amount of the nitrogen fertilizer required in the tomato seedling stage is determined, and the top dressing application amount of the nitrogen fertilizer in the tomato seedling stage is flexibly adjusted by combining the growth condition of the tomato seedling stage.

determining a target value of total nitrogen content in the tomato seedling stage leaves;

and calculating the corrected application amount of the topdressing nitrogen fertilizer in the tomato seedling stage according to the proportion on the basis of the basic application amount of the topdressing nitrogen fertilizer in the tomato seedling stage.

According to the embodiment of the invention, the target value of the total nitrogen content in the tomato seedling stage leaves is determined according to the normal range of the total nitrogen content in the tomato leaves, the detected total nitrogen content of the tomato seedling stage leaves is compared with the target value, the proportion of increasing or decreasing the nitrogen fertilizer is determined according to the comparison result, and the corrected application amount of the tomato seedling stage topdressing nitrogen fertilizer is calculated according to the proportion on the basis of the basic application amount of the tomato seedling stage topdressing nitrogen fertilizer.

For example, the normal range of total nitrogen content in tomato leaves is 3% -4%, the medium level is 3.5% as a target value, and when the total nitrogen content of the detected tomato seedling-stage leaves is greater than or less than the target value of 3.5%, the ratio of reducing or increasing the nitrogen fertilizer is the ratio of the difference part between the target value and the detected total nitrogen content of the tomato seedling-stage leaves and the highest normal level of 4%, and the corrected application amount of the tomato seedling-stage topdressing nitrogen fertilizer is calculated according to the ratio:

Mzn＝Mxn*(7.5-Lmn*100)/4，

wherein Mzn is the corrected application amount of the top dressing nitrogen fertilizer in the tomato seedling stage, mxn is the basic application amount of the top dressing nitrogen fertilizer in the tomato seedling stage, and Lmn is the total nitrogen content of the leaves in the tomato seedling stage.

It should be noted that the proportion of increasing or decreasing the nitrogen fertilizer can be set according to needs, and the embodiment of the present invention is not limited in particular.

Step 130: in the stage of top dressing of the first blossom and the full bearing stage of the tomatoes, the basic application amount of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer in the first blossom and the full bearing stage of the tomatoes and the total nitrogen content, total phosphorus content and total potassium content of leaves in the first blossom and the full bearing stage of the tomatoes are obtained, and the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first blossom and the full bearing stage of the tomatoes is calculated.

Optionally, the calculating the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the top dressing of the initial blossom or full bearing period of the tomato comprises:

According to the embodiment of the invention, the top dressing application amounts of nitrogenous fertilizer, phosphate fertilizer and potash fertilizer in the tomato seedling stage are flexibly adjusted by combining the growth condition of the tomato in the initial flower and fruit setting stage and the full fruit stage of the tomato.

For example, the normal range of the total nitrogen content in the tomato leaves is 3% -4%, the medium level is 3.5% as a target value, when the detected total nitrogen content of the tomato leaves in the first flowering and fruit setting period or the full fruit setting period is greater than or less than the target value by 3.5%, the nitrogen fertilizer is reduced or increased to be the ratio of the difference part between the target value and the detected total nitrogen content of the tomato leaves in the first flowering and fruit setting period or the full fruit setting period to the highest normal level of 4%, and the corrected application amount of the topdressing nitrogen fertilizer in the first flowering and fruit setting period or the full fruit setting period of the tomato is calculated according to the ratio:

Gzn＝Gxn*(7.5-Lgn*100)/4，

wherein Gzn is the corrected application amount of the top dressing nitrogen fertilizer in the first flowering fruit setting period or the full fruit period of the tomatoes, gxn is the basic application amount of the top dressing nitrogen fertilizer in the first flowering fruit setting period or the full fruit period of the tomatoes, and Lgn is the total nitrogen content of leaves in the first flowering fruit setting period or the full fruit period of the tomatoes.

For example, the normal range of the total phosphorus content in the tomato leaves is 0.33% -0.46%, the highest level of 0.46% is used as a target value, and in the case that the total phosphorus content of the detected tomato leaf in the first blossom setting period or full bearing period is greater than or less than the target value of 0.46%, the ratio of the phosphate fertilizer to the highest normal level is reduced or increased to be the ratio of the difference part of the target value and the total phosphorus content of the detected tomato leaf in the first blossom setting period or full bearing period to the highest normal level of 0.46%, and the corrected application amount of the phosphate fertilizer in the first blossom setting period or full bearing period is calculated according to the ratio:

Gzp＝Gxp*(46-Lgp*5000)/23，

wherein Gzp is the corrected application amount of the phosphate fertilizer in the top dressing at the first flowering and fruit setting stage or full fruit stage of the tomato, gxp is the basic application amount of the phosphate fertilizer in the top dressing at the first flowering and fruit setting stage or full fruit stage of the tomato, and Lgp is the total phosphorus content of leaves at the first flowering and fruit setting stage or full fruit stage of the tomato.

For example, the normal range of the total potassium content in the tomato leaves is 2.64% -4.2%, the target value is 3.6%, and when the total potassium content of the detected tomato first flower fruit setting period or full fruit period leaves is greater than or less than the target value of 4.2%, the ratio of the potassium fertilizer to the target value and the difference part of the total potassium content of the detected tomato first flower fruit setting period or full fruit period leaves is reduced or increased to be the ratio of 4.2% of the highest normal level, and the corrected application amount of the additional fertilizer for the potassium fertilizer in the tomato first flower fruit setting period or full fruit period is calculated according to the ratio:

Gzk＝Gxk*(39-Lgk*500)/21，

wherein Gzk is the corrected application amount of the potassium fertilizer in the first flowering and fruit setting period or full fruit period of the tomatoes, gxk is the basic application amount of the potassium fertilizer in the first flowering and fruit setting period or full fruit period of the tomatoes, and Lgk is the total potassium content of leaves in the first flowering and fruit setting period or full fruit period of the tomatoes.

It should be noted that, the proportion of the nitrogen fertilizer, the phosphorus fertilizer and the potassium fertilizer can be increased or decreased according to needs, and the embodiment of the present invention is not limited in particular.

In the present example, the base application amount and the correction application amount refer to the pure nutrient amount, and the unit of the total nitrogen content, the total phosphorus content, and the total potassium content of the leaf is percentage.

According to the tomato fertilization correction method based on soil and plant detection, provided by the invention, the fertilization habits of farmers in different areas are fully considered on the basis of soil and plant tissue detection in different tomato fertilization stages, the nitrogen, phosphorus and potassium fertilization bases in different areas are optimized by combining the soil nutrient condition and the tomato leaf nutrient content, sufficient nutrients are provided for tomato growth, excessive application of chemical fertilizer is avoided, and the effects of flexibly adjusting the fertilizer application amount of the chemical fertilizer and reducing and increasing the chemical fertilizer are achieved.

In another embodiment of the present invention, a land where large tomatoes are planted in a country of shandong province is selected as a planting land, and the planting land is planned to have four ears of fruits with an area of 2.0 mu.

Before the tomatoes are transplanted to soil preparation, soil samples of test plots are obtained, detection values of available nutrients in the soil samples are obtained through detection, and through determination, the content of alkaline hydrolysis nitrogen is 272.5mg/kg, the content of available phosphorus is 90.4mg/kg, the content of available potassium is 364mg/kg, the pH value is 6.3, and the EC value is 1.1ms/cm.

The second correction coefficient value is 2-1.1 based on the EC value.

And evaluating the contents of alkaline hydrolysis nitrogen, available phosphorus and available potassium according to the soil nutrient evaluation standard, selecting a test plot according to the evaluation result, wherein the first correction coefficient value corresponding to the phosphate fertilizer is 1 due to the measured available phosphorus content level is medium.

Selecting a test land block, which is in accordance with the requirement of high alkaline hydrolysis nitrogen content level and medium available phosphorus and available potassium content level, and a test land block, which is in accordance with the requirement of high available potassium content level and medium alkaline hydrolysis nitrogen and available phosphorus content level, in the Shandong Shu county, carrying out test design, and respectively obtaining a first correction coefficient corresponding to a nitrogen fertilizer and a first correction coefficient corresponding to a potassium fertilizer.

Through data statistical analysis on the yield and quality of tomatoes in the test plots, the first correction coefficient value corresponding to nitrogen fertilizer is 0.7, and the first correction coefficient value corresponding to potassium fertilizer is 0.8.

According to the first correction coefficient and the second correction coefficient respectively corresponding to the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer, the corrected application amount calculation formula of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer in the tomato base fertilizer is as follows:

Tdn＝Txn*0.7*(2-1.1)，

Tdp＝Txp*1，

Tdk＝Txk*0.8*(2-1.1)。

evenly dividing the tomato planting land into a basic fertilization group and a correction fertilization group, wherein the basic fertilization group has the following tomato base fertilizer dosage: 8.5 kg/mu of pure nitrogen fertilizer, 8.5 kg/mu of pure phosphorus pentoxide and 8.5 kg/mu of pure potassium oxide.

According to the calculation formula, 5.4 kg/mu of pure nitrogen fertilizer, 8.5 kg/mu of pure phosphorus pentoxide and 6.1 kg/mu of pure potassium oxide in the corrected fertilizer application group can be obtained.

The first topdressing is the tomato seedling stage, healthy mature leaves in the middle of tomato plants of the correction fertilization group are taken before topdressing and sent to a third-party detection laboratory for detection, and the total nitrogen content of the leaves in the tomato seedling stage of the correction fertilization group is detected to be 3.21%.

The basic fertilization group has the following nitrogen fertilizer topdressing dosage in the tomato seedling stage: 2.4kg of pure nitrogen fertilizer per mu, according to the corrected application amount formula of the topdressing nitrogen fertilizer in the seedling stage of the tomatoes in the embodiment:

Mzn＝Mxn*(7.5-Lmn*100)/4，

the obtained pure nitrogen topdressing correction application amount of the correction application group in the tomato seedling stage is as follows:

2.4 = (7.5-3.21%. 100)/4 =2.6 kg/mu.

And the second topdressing is the first flowering and fruit setting period of the tomatoes, the upper and lower leaves of the first ear flowers of the tomato plants of the correction fertilization group are selected before topdressing to detect the total nitrogen, total phosphorus and total potassium contents, and the total nitrogen, total phosphorus and total potassium contents of the leaves of the correction tomato group in the first flowering and fruit setting period are respectively 3.88%, 0.28% and 4.20% through detection.

The basic fertilization group has the following additional fertilization dosages in the initial flower and fruit setting period of the tomatoes: 1 kg/mu of pure nitrogen fertilizer, 1 kg/mu of pure phosphorus pentoxide and 1 kg/mu of pure potassium oxide, according to the corrected application amount formula of the top dressing in the initial flower and fruit setting period of the tomatoes in the above embodiment:

Gzn＝Gxn*(7.5-Lgn*100)/4，

Gzp＝Gxp*(46-Lgp*5000)/23，

Gzk＝Gxk*(39-Lgk*500)/21，

the corrected application amount of the top dressing pure nitrogen fertilizer of the corrected fertilizer application group is =1.1 (7.5-3.88%. 100)/4 =1.0 kg/mu in the initial flowering and fruit setting period of the tomatoes;

correcting the application amount of the additional phosphorus pentoxide in the corrected application group =1.1 (46-0.28% 5000)/23 =1.5 kg/mu;

and (3) applying potassium oxide to the corrected fertilization group in a corrected application amount =1.1 (39-3.60%. 500)/21 = 1.1kg/mu.

And when the first ear of fruit of the tomatoes are subjected to topdressing for the third time, selecting upper and lower leaves of the first ear of fruit of the first tomato plant of the correction fertilization group before topdressing to detect the total nitrogen, total phosphorus and total potassium contents, wherein the total nitrogen, total phosphorus and total potassium contents of the leaves are respectively 3.58%, 0.35% and 3.00% when the first ear of fruit of the tomatoes of the correction fertilization group is subjected to ping-pong size correction.

The basic fertilization group has the following additional fertilization dosage when the first ear of fruit of tomato is table tennis: 0.84 kg/mu of pure nitrogen fertilizer, 0.84 kg/mu of pure phosphorus pentoxide and 1.8 kg/mu of pure potassium oxide, according to the corrected application amount formula of the tomato in the early flowering and fruit setting period and the full fruit period of the topdressing in the above embodiment:

Gzn＝Gxn*(7.5-Lgn*100)/4，

Gzp＝Gxp*(46-Lgp*5000)/23，

Gzk＝Gxk*(39-Lgk*500)/21，

the corrected application amount of the top dressing pure nitrogen fertilizer of the corrected fertilizer application group is =0.84 (7.5-3.58% 100)/4 = 0.82kg/mu when the first cluster fruit of tomatoes is ping-pong balls in size;

the corrected application group is applied with additional phosphorus pentoxide with the corrected application amount =0.84 (46-0.35% 5000)/23 = 1.04kg/mu;

and (3) applying potassium oxide in the corrected fertilization group in a corrected application amount =1.8 (39-3.00% 500)/21 = 2.06kg/mu.

After the first cluster fruits of the tomatoes are picked, the upper and lower leaves of the second cluster fruits of the tomato plants of the corrected fertilization group are selected to detect the total nitrogen, total phosphorus and total potassium contents before topdressing, and after the first cluster fruits of the tomatoes of the corrected fertilization group are picked, the total nitrogen, total phosphorus and total potassium contents of the leaves are respectively 3.43%, 0.37% and 3.80% through detection.

The basic fertilization group has the following additional fertilization dosage after the first cluster fruits of the tomatoes are picked: 1.12 kg/mu of pure nitrogen fertilizer, 1.12 kg/mu of pure phosphorus pentoxide and 2.4 kg/mu of pure potassium oxide, according to the corrected application amount formula of the tomato in the initial blossom and fruit setting period and the top dressing period in the above examples:

Gzn＝Gxn*(7.5-Lgn*100)/4，

Gzp＝Gxp*(46-Lgp*5000)/23，

Gzk＝Gxk*(39-Lgk*500)/21，

the method can obtain that after the first tomato cluster is picked, the corrected fertilization group topdressing pure nitrogen fertilizer application amount =1.12 x (7.5-3.43% 100)/4 = 1.14kg/mu;

correcting the application amount of the additional phosphorus pentoxide of the fertilization group, namely, 1.12 (46-0.37% 5000)/23 = 1.34kg/mu;

and (3) applying potassium oxide to the corrected fertilization group in a corrected application amount =2.4 (39-3.80%: 500)/21 = 2.28kg/mu.

And after the second cluster of tomatoes are picked in the fifth topdressing step, selecting upper and lower leaves of a third cluster of tomato plants of the correction fertilization group before topdressing to detect the total nitrogen, total phosphorus and total potassium contents, wherein the total nitrogen, total phosphorus and total potassium contents of leaves after the second cluster of tomatoes in the correction fertilization group are picked are respectively 2.84%, 0.36% and 4.12% through detection.

The basic fertilization group has the following additional fertilization dosages after the second cluster of tomatoes are picked: 1.12 kg/mu of pure nitrogen fertilizer, 1.12 kg/mu of pure phosphorus pentoxide and 2.4 kg/mu of pure potassium oxide, according to the corrected application amount formula of the tomato in the initial blossom and fruit setting period and the top dressing period in the above examples:

Gzn＝Gxn*(7.5-Lgn*100)/4，

Gzp＝Gxp*(46-Lgp*5000)/23，

Gzk＝Gxk*(39-Lgk*500)/21，

the method can obtain that after the second cluster of tomato is picked, the corrected application amount of the corrected fertilization group for topdressing of the pure nitrogen fertilizer is =1.12 (7.5-2.84% 100)/4 = 1.30kg/mu;

correcting the application amount of the additional phosphorus pentoxide in the fertilization group =1.12 (46-0.36% 5000)/23 = 1.36kg/mu;

and (3) applying potassium oxide in the corrected fertilizing group at a corrected application rate of =2.4 x (39-4.12% 500)/21 = 2.10kg/mu.

After the third cluster of tomato is picked, the upper and lower leaves of the fourth cluster of tomato plant of the correction fertilization group are selected before topdressing for the sixth topdressing to detect the total nitrogen, total phosphorus and total potassium contents, and after detection, the total nitrogen, total phosphorus and total potassium contents of the leaves of the third cluster of tomato of the correction fertilization group are respectively 3.34%, 0.36% and 3.78%.

The basic fertilization group has the following topdressing dosage after the third cluster of tomato is picked: 1.2 kg/mu of pure nitrogen fertilizer, 1.2 kg/mu of pure phosphorus pentoxide and 1.2 kg/mu of pure potassium oxide, according to the corrected application amount formula of the tomato in the early flowering and fruit setting period and the full fruit period of the topdressing in the above examples:

Gzn＝Gxn*(7.5-Lgn*100)/4，

Gzp＝Gxp*(46-Lgp*5000)/23，

Gzk＝Gxk*(39-Lgk*500)/21，

the corrected application group applied additional fertilizer pure nitrogen fertilizer application amount =1.2 x (7.5-3.34% x 100)/4 = 1.25kg/mu after the third cluster of tomatoes is picked;

the corrected fertilization group is fertilized with additional phosphorus pentoxide with the corrected application amount =1.2 (46-0.36% 5000)/23 = 1.46kg/mu;

and (3) applying potassium oxide in the corrected fertilization group at a corrected application rate of =1.2 (39-3.78% 500)/21 = 1.14kg/mu.

Harvesting is carried out after the first cluster fruit is ripe, harvesting is carried out after the second cluster fruit is ripe, harvesting is carried out after the fourth cluster fruit is ripe, and the tomato yield of the basic fertilization group and the tomato yield of the correction fertilization group are respectively counted.

And harvesting after the third cluster fruits are ripe, counting the tomato yield of the basic fertilization group and the tomato yield of the correction fertilization group, randomly selecting 20 third cluster fruits from the tomatoes respectively harvested from the basic fertilization group and the correction fertilization group, and measuring the average diameter of the tomato fruits, the VC content of the tomato fruits and the sugar degree of the tomato fruits.

According to the harvesting results of the first cluster fruit, the second cluster fruit, the third cluster fruit and the fourth cluster fruit, and the measurement results of the diameter of the tomato fruit, the VC content of the tomato fruit and the sugar degree of the tomato fruit in the third cluster fruit, the tomato product and fruit quality indexes of the basic fertilization group and the correction fertilization group are shown in the table 1:

TABLE 1 tomato product and fruit quality index for basal fertilization group and corrected fertilization group

From table 1, it can be seen that the local basal fertilization was corrected based on the local basal fertilization in combination with the conditions of soil available nutrients and tomato plant growth status, and the corrected fertilization resulted in improved tomato yield and quality. The tomato acre yield, the average diameter of tomato fruits, the VC content of tomato fruits and the sugar degree of tomato fruits of the corrected fertilization group are respectively improved by 8.78 percent, 9.81 percent, 17.28 percent and 14.29 percent compared with the basic fertilization group.

The total amount of nitrogen, phosphorus and potassium fertilizers used in the basal and corrected fertilization groups during the entire growth period of tomatoes is shown in table 2:

TABLE 2 Total amount of NPK fertilizer for tomato throughout growth period

As can be seen from table 2, the correction fertilization group decreased the application amounts of nitrogen fertilizer and potassium oxide and increased the application amount of phosphorus pentoxide as compared with the base fertilization group.

Fig. 2 is a schematic structural diagram of the tomato fertilization correction device based on soil and plant detection provided by the present invention, and as shown in fig. 2, the tomato fertilization correction device based on soil and plant detection comprises:

the tomato base fertilizer amount correcting module 210 is used for acquiring the basic application amounts of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer in the tomato base fertilizer, a plurality of first correction coefficients and second correction coefficients before the tomato is subjected to land preparation and fertilization, and calculating the corrected application amounts of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer in the tomato base fertilizer;

the tomato seedling stage topdressing correction module 220 is used for acquiring the total nitrogen content of the tomato seedling stage leaves and the basic application amount of the tomato seedling stage topdressing nitrogen fertilizer in the tomato seedling stage, and calculating the corrected application amount of the tomato seedling stage topdressing nitrogen fertilizer;

and the top dressing correction module 230 is used for acquiring the basic application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first-blossom fruit setting period or the full-bearing period of the tomato and the total nitrogen content, the total phosphorus content and the total potassium content of the leaves in the first-blossom fruit setting period or the full-bearing period of the tomato in the first-blossom fruit setting period and the full-bearing period of the tomato, and calculating the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first-blossom fruit setting period or the full-bearing period of the tomato.

obtaining a first correction coefficient corresponding to the available nutrients according to the index evaluation result

and acquiring the corrected application amount of the potash fertilizer in the tomato base fertilizer according to the product of the first correction coefficient corresponding to the quick-acting potassium and the basic application amount and the second correction coefficient of the potash fertilizer in the tomato base fertilizer.

Optionally, the calculating the corrected application amount of the topdressing nitrogen fertilizer in the tomato seedling stage comprises:

on the basis of the basic application amounts of the nitrogen fertilizer, the phosphorus fertilizer and the potassium fertilizer in the top dressing of the tomato in the first blossom fruit setting period or the full bearing period, the corrected application amounts of the nitrogen fertilizer, the phosphorus fertilizer and the potassium fertilizer in the top dressing of the tomato in the first blossom fruit setting period or the full bearing period are calculated according to the plurality of proportions

It should be noted that, the tomato fertilization correction device based on soil and plant detection provided in the embodiment of the present invention can implement all the method steps implemented by the tomato fertilization correction method based on soil and plant detection, and can achieve the same technical effects, which are not described herein again.

According to the tomato fertilization correction device based on soil and plant detection, provided by the invention, the fertilization habits of farmers in different areas are fully considered on the basis of soil and plant tissue detection in different tomato fertilization stages, the nitrogen, phosphorus and potassium fertilization bases in different areas are optimized by combining the soil nutrient condition and the tomato leaf nutrient content, sufficient nutrients are provided for tomato growth, excessive application of chemical fertilizer is avoided, and the effects of flexibly adjusting the fertilizer application amount of the chemical fertilizer and reducing and increasing the chemical fertilizer are achieved.

Fig. 3 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 3: a processor (processor) 310, a communication interface (communication interface) 320, a memory (memory) 330 and a communication bus 340, wherein the processor 310, the communication interface 320 and the memory 330 communicate with each other via the communication bus 340. The processor 310 may invoke logic instructions in the memory 330 to perform a method for tomato fertilization correction based on soil and plant detection, the method comprising: in the tomato land preparation and fertilization stage, basic application amounts of a nitrogen fertilizer, a phosphate fertilizer and a potassium fertilizer in a tomato base fertilizer, a plurality of first correction coefficients and a plurality of second correction coefficients are obtained, and corrected application amounts of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the tomato base fertilizer are calculated; wherein the first correction coefficient is obtained according to a detection value of a fast-acting nutrient in a soil sample, and the fast-acting nutrient is alkaline-hydrolyzed nitrogen, available phosphorus or fast-acting potassium; the second correction coefficient is obtained according to the EC value in the soil sample; in the tomato seedling stage, acquiring the total nitrogen content of the tomato seedling stage leaves and the basic application amount of the tomato seedling stage top dressing nitrogen fertilizer, and calculating the corrected application amount of the tomato seedling stage top dressing nitrogen fertilizer; in the stage of top dressing of the first blossom and the full bearing stage of the tomatoes, the basic application amount of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer in the first blossom and the full bearing stage of the tomatoes and the total nitrogen content, total phosphorus content and total potassium content of leaves in the first blossom and the full bearing stage of the tomatoes are obtained, and the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first blossom and the full bearing stage of the tomatoes is calculated.

In addition, the logic instructions in the memory 330 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In another aspect, the present invention also provides a computer program product, the computer program product comprising a computer program, the computer program being stored on a non-transitory computer readable storage medium, wherein when the computer program is executed by a processor, the computer is capable of executing the method for correcting fertilization of tomatoes based on soil and plant detection provided by the above methods, the method comprising: in the tomato land preparation and fertilization stage, basic application amounts of a nitrogenous fertilizer, a phosphate fertilizer and a potash fertilizer in a tomato base fertilizer, a plurality of first correction coefficients and a plurality of second correction coefficients are obtained, and corrected application amounts of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer in the tomato base fertilizer are calculated; wherein the first correction coefficient is obtained according to the detection value of available nutrients in a soil sample, and the available nutrients are alkaline-hydrolyzed nitrogen, available phosphorus or available potassium; the second correction coefficient is obtained according to the EC value in the soil sample; in the tomato seedling stage, acquiring the total nitrogen content of the tomato seedling stage leaves and the basic application amount of the tomato seedling stage top dressing nitrogen fertilizer, and calculating the corrected application amount of the tomato seedling stage top dressing nitrogen fertilizer; in the stage of top dressing of the first blossom and the full bearing stage of the tomatoes, the basic application amount of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer in the first blossom and the full bearing stage of the tomatoes and the total nitrogen content, total phosphorus content and total potassium content of leaves in the first blossom and the full bearing stage of the tomatoes are obtained, and the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first blossom and the full bearing stage of the tomatoes is calculated.

In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the method for tomato fertilization correction based on soil and plant detection provided by the above methods, the method comprising: in the tomato land preparation and fertilization stage, basic application amounts of a nitrogenous fertilizer, a phosphate fertilizer and a potash fertilizer in a tomato base fertilizer, a plurality of first correction coefficients and a plurality of second correction coefficients are obtained, and corrected application amounts of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer in the tomato base fertilizer are calculated; wherein the first correction coefficient is obtained according to a detection value of a fast-acting nutrient in a soil sample, and the fast-acting nutrient is alkaline-hydrolyzed nitrogen, available phosphorus or fast-acting potassium; the second correction coefficient is obtained according to the EC value in the soil sample; in the tomato seedling stage, acquiring the total nitrogen content of the tomato seedling stage leaves and the basic application amount of the tomato seedling stage top dressing nitrogen fertilizer, and calculating the corrected application amount of the tomato seedling stage top dressing nitrogen fertilizer; in the stage of top dressing of the first blossom and the full bearing stage of the tomatoes, the basic application amount of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer in the first blossom and the full bearing stage of the tomatoes and the total nitrogen content, total phosphorus content and total potassium content of leaves in the first blossom and the full bearing stage of the tomatoes are obtained, and the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first blossom and the full bearing stage of the tomatoes is calculated.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A tomato fertilization correction method based on soil and plant detection is characterized by comprising the following steps:

in the first blossom and fruit setting stage and the full fruit stage of the tomatoes, acquiring the basic application amount of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer in the first blossom and fruit setting stage or the full fruit stage of the tomatoes and the total nitrogen content, total phosphorus content and total potassium content of leaves in the first blossom and fruit setting stage or the full fruit stage of the tomatoes, and calculating the corrected application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first blossom and fruit setting stage or the full fruit stage of the tomatoes;

wherein, the calculating of the corrected application amount of the tomato seedling stage topdressing nitrogen fertilizer comprises the following steps:

on the basis of the basic application amount of the tomato seedling stage topdressing nitrogen fertilizer, calculating the corrected application amount of the tomato seedling stage topdressing nitrogen fertilizer according to the proportion;

wherein, the calculation of the corrected application amount of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer in the tomato base fertilizer comprises the following steps:

according to the product of the first correction coefficient corresponding to the effective phosphorus and the basic application amount of the phosphate fertilizer in the tomato base fertilizer, obtaining the corrected application amount of the phosphate fertilizer in the tomato base fertilizer;

2. The tomato fertilization correction method based on soil and plant detection as claimed in claim 1, wherein the first correction factor is obtained according to a detection value of available nutrients in a soil sample, and comprises:

3. The tomato fertilization correction method based on soil and plant detection as claimed in claim 2, wherein the obtaining of the first correction coefficient corresponding to the available nutrients according to the result of index evaluation comprises:

4. The method for correcting fertilization of tomatoes based on soil and plant detection as claimed in claim 1, wherein the calculating of corrected application amounts of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer in the first blossom and fruit setting period or full bearing period of tomatoes comprises:

comparing the total nitrogen content, the total phosphorus content and the total potassium content of the leaves in the first flowering and fruit setting period or full fruit period of the tomatoes with target values respectively corresponding to the total nitrogen content, the total phosphorus content and the total potassium content of the leaves in the first flowering and fruit setting period or full fruit period of the tomatoes;

5. The utility model provides a tomato fertilization correcting unit based on soil and plant detection which characterized in that includes:

the tomato seedling stage topdressing correction module is used for acquiring the total nitrogen content of the tomato seedling stage leaves and the basic application amount of the tomato seedling stage topdressing nitrogen fertilizer in the tomato seedling stage and calculating the correction application amount of the tomato seedling stage topdressing nitrogen fertilizer;

the tomato first-blossom fruit setting period and full-bearing period topdressing correction module is used for obtaining the basic application amount of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer in the first-blossom fruit setting period or full-bearing period topdressing of the tomato and the total nitrogen content, total phosphorus content and total potassium content of leaves in the first-blossom fruit setting period or full-bearing period of the tomato in the first-blossom fruit setting period and full-bearing period topdressing stage of the tomato, and calculating the correction application amount of the nitrogen fertilizer, the phosphate fertilizer and the potassium fertilizer in the first-blossom fruit setting period or full-bearing period topdressing of the tomato;

wherein, the step of calculating the corrected application amount of the topdressing nitrogen fertilizer in the tomato seedling stage comprises the following steps:

6. The tomato fertilization correction device based on soil and plant detection as claimed in claim 5, wherein the first correction factor is obtained according to a detection value of available nutrients in a soil sample, and comprises:

7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the method for tomato fertilization correction based on soil and plant detection as claimed in any one of claims 1 to 4.

8. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of the method for tomato fertilization correction based on soil and plant detection as claimed in any one of claims 1 to 4.