CN113620749A

CN113620749A - Special fertilizer for facility eggplants based on yield response and soil fertility and recommended application method thereof

Info

Publication number: CN113620749A
Application number: CN202111062841.1A
Authority: CN
Inventors: 徐新朋; 周卫; 艾超; 何萍; 王玉军; 赵士诚; 仇少君; 丁文成
Original assignee: Institute of Agricultural Resources and Regional Planning of CAAS
Current assignee: Institute of Agricultural Resources and Regional Planning of CAAS
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2021-11-09

Abstract

The invention discloses a special fertilizer for facility eggplants based on yield response and soil fertility and a recommended application method thereof, belonging to the technical field of agricultural resource environments. The invention determines the total amount of application M of facility eggplant crops N, P and K according to the obtainable yield and the agronomic efficiency_{General assembly}(ii) a The special blended fertilizer and/or compound fertilizer for the facility eggplants are prepared by adjusting the nutrient proportion of N to P to K and/or N/N to P/N to K/N provided by the special fertilizer for the facility eggplants, and the recommended fertilizing amount and the application method of the special fertilizer with nitrogen as the standard are given. The special fertilizer for facility eggplants and the recommended application method meet the 4R principle, can meet the nutrient requirement of crops and achieve the purpose of supplying nutrients for the cropsSynchronization is required. The invention has regional characteristics and pertinence, and has guiding effect on the production and reasonable application of the special fertilizer for crops.

Description

Special fertilizer for facility eggplants based on yield response and soil fertility and recommended application method thereof

Technical Field

The invention relates to the technical field of agricultural resource environment, in particular to a special fertilizer for facility eggplants based on yield response and soil fertility and a recommended application method thereof.

Background

Eggplants are vegetables which are widely eaten by people, and are planted in various regions of China, particularly in modern vegetable greenhouses, with very wide planting scale. The eggplant grows fast, has more fruits, is a vegetable crop with larger fertilizer demand, has larger influence on the yield and the quality by the fertilizing amount and the proportion of each nutrient, and the sufficient and reasonable nutrient supply is the guarantee of the healthy and high yield of the eggplant. However, in order to pursue yield and bring the crops to the market early, a large amount of chemical fertilizers are applied by many farmers, so that soil nutrient accumulation is caused, the proportion of crop nutrients is unbalanced, the yield and the quality of eggplants are limited, the farmers can maintain the yield only by putting more fertilizers, and finally the problems of serious unbalance of soil nutrients, salinization, hardening, continuous cropping diseases and the like are caused.

In order to better guide farmers to reasonably and effectively fertilize, maintain soil nutrient balance, keep eggplant yield and quality improvement and reduce unreasonable fertilizer investment, related scientific researchers propose various recommended fertilization methods, such as fertilization with a soil testing formula, a fertilizer effect function method and the like, and particularly the recommended fertilization method based on the soil testing formula is widely concerned by people. However, the requirements on soil detection technology and equipment are high, the difference of soil nutrients among farmer plots is large, the eggplant varieties in different areas react on fertilizers in different ways, and accurate soil measurement formula is difficult to achieve; in addition, the soil nutrient test value cannot completely reflect the soil nutrient supply condition under the influence of the limitations of the current test method. Therefore, it is necessary to intensively study a fertilization method of eggplant.

Disclosure of Invention

In the past 40 years, the application amount of the fertilizer is increased linearly, and the fertilizer utilization rate is continuously reduced due to unreasonable fertilization. Aiming at the problems of unreasonable fertilization, lack of special fertilizers and defects of the conventional recommended fertilizing method and the like of eggplants planted by farmers, the invention provides the special fertilizer for eggplants based on yield response and soil fertility and the recommended application method thereof, and the special fertilizer for eggplants is a simplified, quantified and rationalized special fertilizer for facility eggplants and the application method of the recommended amount thereof. According to the method, the fertilizer is prepared by combining indexes such as the yield level of the land over the years, soil nutrient supply and fertilization yield increase conditions and the like, taking the optimal nutrient management of nutrient collaborative optimization as a principle, meanwhile, the balanced application of nutrients is considered, and the reasonable recommended fertilizing amount is finally provided through simulation calculation. The method is suitable for a planting mode taking small farmers as a main management body, and overcomes the technical problems of the existing fertilizing method.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a special fertilizer preparation method for facility eggplants based on yield response and soil fertility, which comprises the following steps:

(1) calculating the yield response YR of a facility eggplant crop according to formula 1 or formula 2:

YR ═ Yaxk formula 1

YR ═ yield of fertilization plot-yield of vegetarian plot 2

Wherein Ya is the available yield, and k is the yield reaction coefficient;

(2) the yield Ya obtained in the step (1) is determined according to the annual average yield level of the eggplant crops in the facility eggplant planting area; the obtainable yield is increased by 10% on the basis of the previous 3-5 year average yield level of the corresponding normal plot; or the average yield of the problematic plots is increased by 6 percent on the basis of the average yield of 3-5 years;

(3) in the step (1), the yield reaction coefficient k is determined according to the soil fertility level grade, and the soil fertility level grade is determined according to the soil nutrient determination result or according to the soil texture, color, organic matter content of the land and the information of the vegetable planting age;

(4) determining the total amount M of application of the facility eggplant crops N, P and K in the respective planting areas_{General assembly}The total amount of administration M_{General assembly}Calculated from equation 3:

M_{general assembly}YR 1000 AE 3

Wherein M is_{General assembly}The YR is the yield response of the corresponding nutrient, and AE is the agronomic efficiency of the corresponding nutrient;

the agronomic efficiency AE, calculated from formula 4, has a one-dimensional quadratic relationship with the yield response YR:

AE＝a×(YR)²+ b × (YR) + c formula 4

Wherein a is a quadratic term coefficient, b is a primary term coefficient, and c is a constant term;

(5) calculating the nutrient ratio of N: P: K and/or N/N: P/N: K/N provided by the facility eggplant special fertilizer according to the total application amount of the facility eggplant crops N, P and K in the corresponding planting areas obtained in the step (4); the N/N to P/N to K/N nutrient ratio provided by the special fertilizer for the facility eggplant is converted by taking N nutrient as a standard;

(6) adjusting the nutrient ratio of N/N to P/N to K/N provided by the special fertilizer for the facility eggplants obtained in the step (5) according to a fertilizing measure; preparing a special blended fertilizer and/or a compound fertilizer for the facility eggplants according to the obtained N/N to P/N to K/N nutrient ratio of the special fertilizer for the facility eggplants; the special bulk blending fertilizer and/or compound fertilizer for the greenhouse eggplants are special fertilizer for basal application, special fertilizer for first dressing, special fertilizer for second dressing, special fertilizer for third dressing and special fertilizer for fourth dressing.

The definitions or terms of the terms related to the present invention are to be construed as follows:

the yield (atternable yield, Ya) was obtained: i.e., the maximum yield obtained under field or test station testing conditions using currently known information technology and advanced management practices while eliminating yield limiting factors (e.g., nutrients, pests, etc.).

Yield reaction (yield response, YR): the yield difference between the fertilization treatment and the nutrient deficiency treatment is indicated. The difference between the yield and the yield of the corresponding subtractive treatment was obtained and the N-, P-and K-applied yield responses are indicated as YRN, YRP and YRK, respectively. YR is the yield increased by fertilization and is one of the important parameters to be considered for balanced fertilization. YR can reflect not only the condition of soil basic nutrient supply but also the condition of fertilization effect.

Agronomic Efficiency (AE): refers to the yield increase of crops by applying a certain nutrient. I.e., yield increment of crops to which 1kg of certain nutrient was applied, the nitrogen, phosphorus and potassium agronomic efficiencies are indicated by AEN, AEP and AEK, respectively. The agronomic efficiency reflects the yield increasing effect of the fertilizer.

Further, the yield reaction coefficient k in the step (3) is based on the soil fertility level grade and the early multi-year multi-point historical data, the data comprises a large amount of yield and fertilization yield increase effect data obtained by a fertilizer test of the facility eggplant in China developed in 2018, regression analysis is applied to simulate and establish the relationship between the yield and the fertilizer yield increase effect in the facility eggplant planting area, and the statistical, calculation and analysis results are summarized in table 1.

TABLE 1

Level of soil fertility	k_N	k_P	k_K
				Is low in	0.1975	0.1093	0.1609
In	0.1378	0.0832	0.1070
				Height of	0.0700	0.0520	0.0745

Further, the soil fertility level grades in the step (3) are divided into low, medium and high level grades according to the soil organic matter content and the measurement result of the available nitrogen nutrients, and the soil fertility level grade division principle is as follows:

dividing principle of soil organic matter content: the soil organic matter content is less than 1.5%, 1.5% -2.5% and more than 2.5% respectively corresponding to the low, medium and high levels of soil fertility;

dividing the principle of the soil available nitrogen nutrient supply capacity: if the quick-acting nitrogen is more than 150mg/kg, upgrading the low grade and the medium grade corresponding to the measured value of the organic matter content into a medium grade and a high grade; and if the quick-acting nitrogen is less than 100mg/kg, degrading the corresponding high grade to the medium grade according to the measured value of the organic matter content. The results are summarized in Table 2.

TABLE 2

Further, the soil fertility level grade in the step (3) is divided into low, medium and high level grades according to the planting age of vegetables in the plot and with the information of the texture, color and organic matter content of the soil in the plot, and the dividing principle of the soil fertility level grade is as follows:

the planting age is less than 5 years, when the soil texture is clay and loam, the soil color is reddish or yellowish, gray or brown, or the organic matter content is medium or low, the soil fertility level is low, and when the soil color is black, or the soil organic matter content is high, the soil fertility level is medium; the soil texture is sandy; the soil fertility level is low;

the planting age is 5-10 years, when the soil texture is slime and loam, no matter the soil color, the soil organic matter content is medium or high, the soil fertility level is medium;

the planting age is more than or equal to 10 years, the soil texture is sandy, and the soil fertility level is medium no matter how the soil color is or when the soil organic matter content is higher than a medium level; when the soil texture is slime and loam, no matter how the soil color is, or when the soil organic matter content is higher than a medium level, the soil fertility level is high. The specific principles are summarized in Table 3.

TABLE 3

Further, the numerical values of the coefficients a, b, c of the one-dimensional quadratic equation between the agronomic efficiency of the facility eggplant crop and the yield response of the facility eggplant crop in step (4) are obtained by fitting a binomial curve to past 10-15 years of test data for the facility eggplant, wherein:

binomial coefficient of nitrogen (N) of facility eggplant: a is_N＝-0.1185，b_N＝3.1171，c_N＝6.9770，

Binomial coefficient of facility eggplant phosphorus (P): a is_P＝-0.4036，b_P＝14.4601，c_P＝8.2581，

Binomial coefficient of potassium (K) of facility eggplant: a is_K＝-0.1193，b_K＝4.0502，c_K＝4.0783；

Namely:

AEN(kg/kg)＝a_N×(YRN)²+b_N×(YRN)+c_N＝-0.1185×(YRN)²+3.1171×(YRN)+6.9770，

AEP(kg/kg)＝a_P×(YRP)²+b_P×(YRP)+c_P＝-0.4036×(YRP)²+14.4601×(YRP)+8.2581，

AEK(kg/kg)＝a_K×(YRK)²+b_K×(YRK)+c_K＝-0.1193×(YRK)²+4.0502×(YRK)+4.0783。

further, the total amount of the corresponding nutrients applied in step (4) is:

N_{general assembly}(kg/ha)＝(YRN)×1000/[-0.1185×(YRN)²+3.1171×(YRN)+6.977]，

P_{General assembly}(kg/ha)＝(YRP)×1000/[-0.4036×(YRP)²+14.4601×(YRP)+8.2581]，

K_{General assembly}(kg/ha)＝(YRK)×1000/[-0.1193×(YRK)²+4.0502×(YRK)+4.0783]。

Further, the adjustment according to the fertilization measure in the step (6) refers to the distribution proportion of the fertilizer basis N, P and K nutrients distributed according to the fertilization rule in the whole growth period of the facility eggplant; the special fertilizer for the facility eggplants is composed of a base fertilizer special fertilizer, a first additional fertilizer special fertilizer, a second additional fertilizer special fertilizer, a third additional fertilizer special fertilizer and a fourth additional fertilizer special fertilizer respectively;

the basic fertilizer special for the facility eggplants, the first additional fertilizer special fertilizer, the second additional fertilizer special fertilizer, the third additional fertilizer special fertilizer, the fourth additional fertilizer special fertilizer base N, P and the K nutrient are distributed according to the distribution principle that the basic fertilizer special for the facility eggplants provides the total amount of the basic N, P and the K nutrient as follows:

n nutrients: when N is present_{General assembly}When the weight is more than or equal to 360(kg/ha), the base application is carried out for 1 time and the additional application is carried out for 4 times, and the distribution proportion of the special fertilizer for the base application, the special fertilizer for the first additional application, the special fertilizer for the second additional application, the special fertilizer for the third additional application and the special fertilizer for the fourth additional application N in the high, medium and low fertility soil is respectively 15 to 30 to 15 to 10 percent, 20 to 25 to 30 to 15 to 10 percent and 25 to 20 to 15 percent; when N is present_{General assembly}<360(kg/ha), applying basal fertilizer for 1 time and applying additional fertilizer for 3 times, and applying basal fertilizer and additional fertilizer for eggplant in high, medium and low fertility soilThe proportion of the special fertilizer for the second dressing and the proportion of the special fertilizer for the third dressing are respectively 15 to 30 to 25 percent, 20 to 30 to 20 percent and 30 to 25 to 20 percent;

nutrient P: applying for 1 time and applying for 2 times; wherein, the base fertilizer P accounts for 70% of the total P, and the first dressing fertilizer and the second dressing fertilizer P respectively account for 15% and 15% of the total P;

the nutrient K is determined according to the nitrogen application times, and when the nitrogen is applied for 1 time and 4 times, the proportion of the special fertilizer for basal application, the special fertilizer for first dressing, the special fertilizer for second dressing, the special fertilizer for third dressing and the special fertilizer for fourth dressing of the eggplant is 20-15-30-25-10 percent respectively; when the fertilizer is applied for 1 time and applied for 3 times, the proportion of the special fertilizer for basal application, the special fertilizer for first application, the special fertilizer for second application and the special fertilizer for third application of the eggplant is 20-30 percent respectively.

Further, the specific preparation steps of the special bulk blending fertilizer and/or compound fertilizer for eggplants in the facility in the step (6) are as follows:

converting the N to P ratio of the special fertilizer for facility eggplants according to the N to P to K ratio and/or N/N to P/N to K/N nutrient ratio of the special fertilizer for facility eggplants₂O₅:K₂Proportioning nutrients O;

according to the special fertilizer N: P for basal application and top application of the facility eggplant₂O₅:K₂The proportion of the O nutrient is determined according to the GB15063-2001 compound fertilizer/compound fertilizer standard, the content of the special mixed fertilizer and/or compound fertilizer for eggplants in the corresponding facilities and the corresponding N-P₂O₅-K₂And (4) carrying out fertilizer preparation production after the grade of O.

The invention also provides a recommended application method of the special eggplant fertilizer based on yield response and soil fertility, a calculation method for determining the application amount of the special eggplant fertilizer based on the yield response and the soil fertility, and the recommended application method based on available yield, yield response and agronomic efficiency, which comprises the following steps:

determining the total nitrogen application amount N of the facility eggplant crops in the corresponding planting areas in the whole growth period according to the step (4)_{General assembly}Determining that N is provided by the special fertilizer for the facility eggplant crops in the corresponding planting areas in the step (6) to account for the total nitrogen application amount N_{General assembly}Percentage m% of;

according to the special blending (BB) fertilizer and/or compound fertilizer N-P for the facility eggplants₂O₅-K₂N nutrient concentration w (%) in O grade, total nitrogen application amount N in whole growth period of facility eggplant crops in corresponding planting areas_{General assembly}(kg/ha) and N accounts for the total nitrogen application amount of the special fertilizer for facility eggplants in the corresponding planting areas_{General assembly}Determining the recommended application amount of the facility eggplant special fertilizer in the corresponding planting area, wherein the recommended application amount is calculated by formula 5:

recommended application rate (kg/ha) ═ N_{General assembly}(kg/ha) × m (%)/w (%) formula 5

Wherein m (%) is the percentage of the special fertilizer N for the facility eggplant in the total nitrogen application amount, and w (%) is the special blended (BB) fertilizer and/or compound fertilizer N-P for the facility eggplant₂O₅-K₂Concentration (%) of N nutrients in O grade.

Further, the application method comprises the following steps:

when N is present_{General assembly}When the weight is more than or equal to 360kg/ha, basal application is carried out for 1 time, dressing is carried out for 4 times, and the basal application and the dressing are respectively carried out before field planting, when the seedling period is as long as 5 true leaves, when the seedling period enters the growth period, when the fruit has the egg size and when the fruit enters the fruit expansion period, and the interval is usually 10-15 days. The recommended application rates of the special fertilizers for basal application of the eggplants in the high, medium and low fertility soil facilities are N respectively_{General assembly}(kg/ha)×15％/w(％)、N_{General assembly}(kg/ha)×20％/w(％)、N_{General assembly}(kg/ha)×25％/w(％)；

The recommended application rates of the special top dressing fertilizer in the facility eggplant top dressing are N respectively_{General assembly}(kg/ha)×30％/w(％)、N_{General assembly}(kg/ha)×25％/w(％)、N_{General assembly}(kg/ha)×25％/w(％)；

The recommended application rates of the two additional special fertilizers are N_{General assembly}(kg/ha)×30％/w(％)，N_{General assembly}(kg/ha)×30％/w(％)、N_{General assembly}(kg/ha)×20％/w(％)；

The recommended application rates of the three topdressing special fertilizers are N respectively_{General assembly}(kg/ha)×15％/w(％)、N_{General assembly}(kg/ha)×15％/w(％)，N_{General assembly}(kg/ha)×15％/w(％)；

Recommended application amount of four-top dressing special fertilizerAre respectively N_{General assembly}(kg/ha)×10％/w(％)、N_{General assembly}(kg/ha)×10％/w(％)、N_{General assembly}(kg/ha)×15％/w(％)；

When N is present_{General assembly}<At 360(kg/ha), basal application is carried out for 1 time, and dressing is carried out for 3 times, wherein the basal application and the dressing are respectively carried out before field planting, when the seedling stage is as long as 5 true leaves enter the growth stage, when the fruit has the size of eggs and enters the fruit expansion stage. The recommended application rates of the special fertilizers for basal application of the eggplants in the high, medium and low fertility soil facilities are N respectively_{General assembly}(kg/ha)×15％/w(％)、N_{General assembly}(kg/ha)×20％/w(％)、N_{General assembly}(kg/ha)×30％/w(％)；

The recommended application rates of the special top dressing fertilizer in the facility eggplant top dressing are N respectively_{General assembly}(kg/ha)×30％/w(％)、N_{General assembly}(kg/ha)×30％/w(％)、N_{General assembly}(kg/ha)×25％/w(％)；

The recommended application rates of the two additional special fertilizers are N_{General assembly}(kg/ha)×30％/w(％)、N_{General assembly}(kg/ha)×30％/w(％)、N_{General assembly}(kg/ha)×25％/w(％)；

The recommended application rates of the three topdressing special fertilizers are N respectively_{General assembly}(kg/ha)×25％/w(％)、N_{General assembly}(kg/ha)×20％/w(％)、N_{General assembly}(kg/ha)×20％/w(％)。

The invention discloses the following technical effects:

1. the special fertilizer for the facility eggplant based on the yield reaction and the soil fertility and the recommended application method have the advantages that the crop rotation system, straw returning, nutrient residual effect of crops in the previous season, organic fertilizer application, atmosphere settlement, irrigation water and other source nutrients except the soil are taken into consideration. And (4) for the eggplant fertilizer preparation, calculating according to the nutrient amount required by the crop yield reaction and the nutrient amount required by the supplement of the overground part moving amount of the crops. And recommending the eggplant to be fertilized, obtaining the fertilizer according to the related relation between the crop agronomic efficiency and the yield response, and properly adjusting the fertilizer according to the land detail information and the classification of the basic nutrient supply capacity of the soil.

2. Yield response and relative yield reflect the basal nutrient supply capacity of the soil, while agronomic efficiency reflects fertilizer effect. The yield response and the agronomic efficiency have obvious quadratic curve relationship, the agronomic efficiency is increased along with the continuous increase of the yield response, the yield response is continuously increased, and the increasing amplitude of the agronomic efficiency is gradually reduced. Since this relationship involves different environmental conditions, ground force levels. Therefore, the special fertilizer preparation and recommended application method for the facility eggplants has regional characteristics and pertinence, and has guiding effect on special fertilizer application production and reasonable fertilizer application.

3. The special fertilizer preparation and recommended application method for the facility eggplants based on the yield response and the soil fertility, disclosed by the invention, overcomes the blindness of habitual fertilization of farmers and the complexity and difficult operability of soil testing and fertilizer preparation, and is time-saving, labor-saving and high in operability. Meanwhile, the fertilizer is more beneficial to keeping the nutrient balance of soil and crops, thereby promoting the virtuous cycle and utilization of nutrients and reducing the risks of soil salinization, hardening and continuous cropping diseases caused by excessive or unbalanced fertilization.

4. According to the special fertilizer preparation and recommended application method for the facility eggplants based on the yield response and the soil fertility, the nutrient requirement rule of the eggplants is simulated according to a large amount of historical data, parameters comprise wide varieties and environmental condition information in China, the method has general guiding significance, can be applied to eggplant planting areas in various places in China, has strong applicability, and can meet the requirements of fertilizer preparation production and recommended application in area scale.

5. The special fertilizer preparation and recommended application method for the facility eggplants based on the yield response and the soil fertility conforms to the 4R principle, namely, the proper fertilizer type is selected, the proper dosage is used, and the fertilizer is applied to the proper position in the proper time so as to meet the nutrient requirement of crops and achieve the synchronization of supply and demand.

6. The invention relates to a fertilizer preparation and recommended application method for a facility eggplant based on yield response and soil fertility, which is a method for preparing fertilizer and recommending application for an eggplant crop based on yield response and agronomic efficiency, which is established on the basis of summarizing fertilizer field tests which are developed nationwide in the last decade and based on a database containing information of yield response, agronomic efficiency and nutrient absorption and utilization of the facility eggplant, and is a method for preparing fertilizer and recommending application for an eggplant crop based on the yield response and the agronomic efficiency, and is a light and simplified method for preparing fertilizer and recommending application.

Drawings

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

FIG. 1 is a graph of nitrogen yield response versus nitrogen agronomic efficiency for eggplant plants of example 1;

FIG. 2 is a graph of phosphorus yield response versus phosphorus agronomic efficiency for eggplant plants of example 1;

FIG. 3 is a graph of potassium yield response versus potassium agronomic efficiency for eggplant plants at the facility of example 1;

wherein: x is yield response, y is agronomic efficiency, R²Is the correlation coefficient.

Detailed Description

Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.

It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.

As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.

Example 1

Special mixed fertilizer and/or compound fertilizer mixed fertilizer for greenhouse eggplants and application method thereof

In this embodiment, Shixinzhu is conducted at Tutunzhen in Diwu area of Tianjin, and the protected eggplant cultivation crop is a protected cultivation mode from spring crop to late autumn crop.

The average yield level of the facility eggplant of the test site in the past 5 years is 60 t/ha. The yield of the facility eggplant is 1.10 times of the average yield level of the past 5 years, namely the yield Ya of the facility eggplant is 60t/ha multiplied by 1.10 which is 66 t/ha.

The soil of the test site field has the organic matter content of 2.0 percent, the quick-acting nitrogen content of 123mg/kg, the quick-acting phosphorus content of 68mg/kg and the quick-acting potassium content of 171mg/kg, so the soil of the test site field has the fertility grade of medium fertility soil. From Table 1, yield reaction coefficient k_N＝0.1378、k_P＝0.0832、k_K0.1070; the yield response is calculated from the formula YR ═ Ya × k, i.e.:

YRN(t/ha)＝Ya(t/ha)×k_N＝66t/ha×0.1378＝9.09t/ha；

YRP(t/ha)＝Ya(t/ha)×k_P＝66t/ha×0.0832＝5.49t/ha；

YRK(t/ha)＝Ya(t/ha)×k_K＝66t/ha×0.1070＝7.06t/ha；

the Agricultural Efficiency (AE) of the eggplant crop of the field facility of the test site is represented by the formula AE (kg/kg) ═ a × (YR)²+ b × (YR) + c, wherein:

binomial coefficients (a, b, c) of nitrogen (N) of facility eggplant are shown in fig. 1: a is_N＝-0.1185，b_N＝3.1171，c_N＝6.977；

Binomial coefficients (a, b, c) of facility eggplant phosphorus (P) are shown in fig. 2: a is_P＝-0.4036，b_P＝14.4601，c_P＝8.2581；

Binomial coefficients (a, b, c) of potassium (K) in facility eggplant are shown in fig. 3: a is_K＝-0.1193，b_K＝4.0502，c_K＝4.0783；

Namely:

AEN(kg/kg)＝a_N×(YRN)²+b_N×(YRN)+c_N＝-0.1185×(YRN)²+3.1171×(YRN)+6.977＝-0.1185×9.09²+3.1171×9.09+6.977＝25.52；

AEP(kg/kg)＝a_P×(YRP)²+b_P×(YRP)+c_P＝-0.4036×(YRP)²+14.4601×(YRP)+8.2581＝-0.1762×5.49²+14.4601×5.49+8.2581＝75.48；

AEK(kg/kg)＝a_K×(YRK)²+b_K×(YRK)+c_K＝-0.1193×(YRK)²+4.0502×(YRK)+4.0783＝-0.1193×7.06²+4.0502×7.06+4.0783＝26.73；

the total amount of N, P and K applied to eggplant crops in the field facility of the test site is given by the formula M_{General assembly}(kg/ha) ═ YR (t/ha) × 1000/AE (kg/kg), where:

N_{general assembly}(kg/ha)＝(YRN)×1000/AEN＝9.09t/ha×1000/25.52＝356.19kg/ha；

P_{General assembly}(kg/ha)＝(YRP)×1000/AEP＝5.49t/ha×1000/75.48＝72.73kg/ha；

K_{General assembly}(kg/ha)＝(YRK)×1000/AEK＝7.06t/ha×1000/26.73＝264.12kg/ha；

The special fertilizer for the eggplants in field facilities of the test site has the advantages that the ratio of N to P to K is 356.19 to 72.73 to 264.12, and the ratio of N to P to N to K to N is 1.00 to 0.20 to 0.74 by conversion based on N nutrients.

N total amount of eggplant to be planted in field facility of test site_{General assembly}<360(kg/ha), the fertilizing times is 4, namely 1 time of basal application and 3 times of topdressing, and the proportion of N nutrients in the medium-fertility soil, the basal application special fertilizer, the first topdressing special fertilizer, the second topdressing special fertilizer and the third topdressing special fertilizer for the facility eggplant is 20-30-20 percent; the proportion of the P nutrient in the special fertilizer for basal application, the special fertilizer for first dressing and the special fertilizer for second dressing of the facility eggplant is 70 to 15 percent; the K nutrient and the N nutrient are synchronous, and the distribution proportion of the K nutrient in the facility eggplant basal application special fertilizer, the first dressing special fertilizer, the second dressing special fertilizer and the third dressing special fertilizer is 20-30 percent; the special fertilizer for basal application, the special fertilizer for first dressing and the special fertilizer for second dressing of the facility eggplant are respectively applied before field planting, when the seedling stage is as long as 5 true leaves, when the seedling stage enters the growth stage and the fruit has the size of eggs, and the special fertilizer is usually applied once every 10 to 15 days;

the results of the N: P: K and N/N: P/N: K/N nutrient ratios of nutrients comprising N, P and K distributed by fertilization measures for eggplant as a field facility at a test site are summarized in Table 4.

TABLE 4

The ratio of N/N to P/N to K/N nutrients distributed according to the fertilizing measures is converted into N to P of special fertilizer for eggplants₂O₅:K₂The results of the O nutrient ratios are summarized in Table 5.

TABLE 5

From Table 5, the special fertilizer for basal application of facility eggplant is N: P₂O₅:K₂The fertilizer is prepared according to the ratio of N to P, wherein O is 1.00:1.64:0.89, and the special fertilizer for the eggplant facility is applied₂O₅:K₂O1.00: 0.24:0.59, and Bitopdressing fertilizerN:P₂O₅:K₂1.00:0.24:0.89, K, N: K, three topdressing special fertilizer₂And (4) preparing the fertilizer when O is 1.00: 1.33.

1. Special Bulk Blending (BB) fertilizer and/or compound fertilizer preparation method for greenhouse eggplants

The total nutrient content (%) of the special fertilizer for facility eggplants is prepared and produced according to 45%.

According to the N-P in the GB15063-2001 compound fertilizer (compound fertilizer) standard₂O₅-K₂The requirement of O grade is that the special fertilizer N: P is applied according to the basic application of the facility eggplant₂O₅:K₂1.00:1.64:0.89, P as special fertilizer₂O₅:K₂O1.00: 0:24:0.59, N: P as special fertilizer₂O₅:K₂1.00:0.24:0.89, K, N: K, three topdressing special fertilizer₂O1.00: 1.33, according to the formula N-P₂O₅-K₂O (total nitrogen-phosphorus pentoxide-potassium oxide) sequence, and the formula of the special fertilizer for basal application of the facility eggplant is N-P₂O₅-K₂12.75-20.91-11.35 percent of O, and the formula of the special fertilizer for facility eggplant-topdressing is N-P₂O₅-K₂24.59-5.90-14.51 percent of O, and the formula of the special fertilizer for the second dressing of the facility eggplant is N-P₂O₅-K₂21.13-5.07-18.80 percent of O, and the formula of the special fertilizer for facility eggplant Sanzhu is N-P₂O₅-K₂O ═ 19.31-0.00-25.69. The raw materials and the amounts of the special fertilizer for each ton of facility eggplants are summarized in table 6.

TABLE 6

1.1 facility eggplant basal application special Bulk Blending (BB) fertilizer and/or special compound fertilizer and/or compound fertilizer (calculated by per ton dry base fertilizer)

(1) Special Bulk Blending (BB) fertilizer for basic application of facility eggplants

166.06kg of granular urea, 464.67kg of monoammonium phosphate, 113.50kg of potassium sulfate, 94.58kg of potassium chloride and 161.19kg of filler are weighed, fully and uniformly mixed in an asymmetric double-helix mixer, and are conveyed into a metering package by a belt conveyor to obtain the blended fertilizer (BB fertilizer) special for eggplant base application.

(2) Special compound fertilizer and/or compound fertilizer for basal application of greenhouse eggplants

166.06kg of urea, 464.67kg of monoammonium phosphate, 113.50kg of potassium sulfate, 94.58kg of potassium chloride and 161.19kg of filler are weighed, fully and uniformly mixed in an asymmetric double-helix mixer, sent into a granulator (both a disc granulator and a drum granulator) by a belt conveyor for granulation, dried, cooled, screened, metered and packaged to obtain the special compound fertilizer and/or compound fertilizer for eggplant base application.

1.2 production of Bulk Blended (BB) fertilizer and/or compound fertilizer (per ton of dry fertilizer) for eggplant by facility-dressing

(1) Special Bulk Blending (BB) fertilizer for facility eggplant

503.21kg of granular urea, 131.11kg of monoammonium phosphate, 145.10kg of potassium sulfate, 120.92kg of potassium chloride and 99.66kg of filler are weighed, fully and uniformly mixed in an asymmetric double-helix mixer, and are conveyed into a metering package by a belt conveyor to obtain the first special blended fertilizer (BB fertilizer) for dressing eggplant.

(2) Compound fertilizer and/or compound fertilizer special for facility eggplant

503.21kg of urea, 131.11kg of monoammonium phosphate, 145.10kg of potassium sulfate, 120.92kg of potassium chloride and 99.66kg of filler are weighed, fully and uniformly mixed in an asymmetric double-helix mixer, sent into a granulator (both a disc granulator and a drum granulator) by a belt conveyor for granulation, dried, cooled, screened, metered and packaged to obtain the first additional application compound fertilizer and/or compound fertilizer for eggplants.

1.3 production of Bulk Blending (BB) fertilizer and/or compound fertilizer (per ton of dry fertilizer) for eggplant under the facility

(1) Special Bulk Blending (BB) fertilizer for facility eggplant secondary dressing

432.41kg of granular urea, 112.67kg of monoammonium phosphate, 188.00kg of potassium sulfate, 156.67kg of potassium chloride and 110.26kg of filler are weighed, fully and uniformly mixed in an asymmetric double-helix mixer, and are conveyed into a metering package by a belt conveyor, so that the special blended fertilizer (BB fertilizer) for second additional application of the eggplants is obtained.

(2) Special compound fertilizer and/or compound fertilizer for facility eggplant two-stage dressing

432.41kg of urea, 112.67kg of monoammonium phosphate, 188.00kg of potassium sulfate, 156.67kg of potassium chloride and 110.26kg of filler are weighed, fully and uniformly mixed in an asymmetric double-helix mixer, sent into a granulator (both a disc granulator and a drum granulator) by a belt conveyor for granulation, dried, cooled, screened, metered and packaged to obtain the special compound fertilizer and/or compound fertilizer for the second dressing of eggplants.

1.4 production of Bulk Blended (BB) fertilizer and/or compound fertilizer (per ton of dry fertilizer) specially for eggplant by facility three applications

(1) Special Bulk Blending (BB) fertilizer for facility eggplant triple cropping

419.78kg of granular urea, 256.90kg of potassium sulfate, 214.08kg of potassium chloride and 109.23kg of filler are weighed, fully and uniformly mixed in an asymmetric double-helix mixer, and are conveyed into a metering package by a belt conveyor to obtain the fourth additional application special bulk blended fertilizer (BB fertilizer) for eggplants.

(2) Compound fertilizer and/or compound fertilizer special for facility eggplant Sanzhu

419.78kg of urea, 256.90kg of potassium sulfate, 214.08kg of potassium chloride and 109.23kg of filler are weighed, fully and uniformly mixed in an asymmetric double-helix mixer, sent into a granulator (both a disc granulator and a drum granulator) by a belt conveyor for granulation, and then dried, cooled, screened, metered and packaged to obtain the special compound fertilizer and/or compound fertilizer for the fourth dressing of eggplants.

2. Recommended application amount of special blended (BB) fertilizer and/or compound fertilizer for greenhouse eggplants

The application amount of the special fertilizer for the facility eggplant is converted by taking the total nitrogen application amount of the facility eggplant in the whole growth period as a standard, and the method comprises the following specific steps of:

2.1 Total Nitrogen application during the Whole growth period of eggplant facility

The total nitrogen application amount of the facility eggplant during the whole growth period is determined according to the nitrogen application Yield Reaction (YRN) of the facility eggplant crop in the corresponding planting area and the nitrogen Agronomic Efficiency (AEN) of the facility eggplant crop in the corresponding planting area. From the formula N_{General assembly}(kg/ha) ═ YRN (t/ha) × 1000/AEN (kg/kg). Wherein the facility eggplantThe product yield reaction YRN is 9.09t/ha and the agronomic efficiency AEN is 25.52 (kg/kg). Namely: nitrogen application total amount of facility eggplants: n is a radical of_{General assembly}(kg/ha)＝(YRN)×1000/AEN＝9.09t/ha×1000/25.52＝356.19kg/ha。

2.2 recommended application rates for Bulk Blended (BB) fertilizer and/or compound fertilizer for eggplants under greenhouse

In medium-fertility soil, the special fertilizer N for basal application of the facility eggplant, the special fertilizer N for first dressing, the special fertilizer N for second dressing and the special fertilizer N for third dressing are respectively distributed according to 20% -30% -20% of the total amount of the applied N. Namely:

the percentage m (%) of the special fertilizer N for basal application of the facility eggplant to the total nitrogen application amount is 20%,

the percentage m (%) of the special fertilizer N for the first dressing of the facility eggplant accounts for 30% of the total nitrogen application amount,

the percentage m (%) of the special fertilizer N for the second additional application of the facility eggplant to the total nitrogen application amount is 30%,

the percentage m (%) of the special fertilizer N for three-dressing eggplant facility to the total nitrogen application amount is 20%.

(1) The formula of the blended (BB) fertilizer and/or compound fertilizer and/or the application amount of the compound fertilizer special for basal application of the facility eggplants is N-P₂O₅-K₂12.75-20.91-11.35% of O, and 12.75% of w (%); namely:

special mixed (BB) fertilizer and/or compound fertilizer recommended application amount (kg/ha) N for basal eggplant application in facility_{General assembly}(kg/ha)×m(％)/w(％)＝356.19kgN/ha×20％/12.75％＝558.73kg/ha；

(2) Special Bulk Blending (BB) fertilizer and/or compound fertilizer application amount for facility eggplant first dressing

The grade (matching type) of the special fertilizer for eggplant planting in the facility is N-P₂O₅-K₂O-24.59-5.90-14.51, w (%) -24.59; namely:

special blending (BB) fertilizer and/or compound fertilizer recommended application amount (kg/ha) N for facility eggplant-after-dressing_{General assembly}(kg/ha)×m(％)/w(％)＝356.19kg/ha×30％/24.59％＝434.55kg/ha；

(3) Special blending (BB) fertilizer and/or compound fertilizer application amount for facility eggplant secondary dressing

The grade (matching formula) of the special fertilizer for two-stage dressing of eggplants in facility is N-P₂O₅-K₂21.13-5.07-18.80% of O, 21.13% of w (%); namely:

special blending (BB) fertilizer and/or compound fertilizer recommended application amount (kg/ha) N for facility eggplant secondary dressing_{General assembly}(kg/ha)×m(％)/w(％)＝356.19kg/ha×30％/21.13％＝505.71kg/ha；

(4) Special Bulk Blending (BB) fertilizer and/or compound fertilizer application amount for facility eggplant triple-dressing

The grade (matching formula) of the special fertilizer for three-dressing for eggplant facility is N-P₂O₅-K₂O19.31-0.00-25.69, w (%) 19.31%; namely:

special blending (BB) fertilizer and/or compound fertilizer recommended application rate (kg/ha) N for facility eggplants_{General assembly}(kg/ha)×m(％)/w(％)＝356.19kg/ha×20％/19.31％＝368.92kg/ha。

3. Effects of the embodiments

In this example, two control treatments were set for field trials to compare with the method of the present invention, specifically as follows: CK (no nitrogenous fertilizer treatment) and FP (high nitrogenous fertilizer treatment). Wherein the nitrogen fertilizer dosage for FP treatment of facility eggplant is 450.0kgN/ha, phosphorus (P)₂O₅) Potassium (K)₂O) the fertilizer application amount is the same as that of the special fertilizer for the facility eggplants. The results of the annual total yield and the utilization rate of nitrogen fertilizer in each treatment of the facility eggplant spring stubble-autumn delayed production are summarized in table 7.

TABLE 7

As can be seen from Table 7, the total yield of the special fertilizer for eggplant applying the facility provided by the invention is increased by 16.12% compared with that of the eggplant not applied with nitrogen fertilizer. Compared with high nitrogen fertilizer treatment, the method can ensure that the total yield of eggplants is basically equal to the yield of high nitrogen fertilizer treatment without obvious difference under the condition of reducing the nitrogen fertilizer dosage by 20.85 percent.

Compared with the high-nitrogen fertilizer treatment, the special fertilizer for the facility eggplants has the advantages that the difference of the total nitrogen accumulation amount of the overground parts of the eggplants is not obvious, but the agricultural utilization rate and the apparent utilization rate of the nitrogen fertilizer of the eggplants are obviously higher than those of the high-nitrogen fertilizer treatment by applying the special fertilizer for the facility eggplants. Compared with the high-nitrogen fertilizer treatment, the special fertilizer for eggplants with the facility provided by the invention can improve the agricultural utilization rate and the apparent utilization rate of the nitrogen fertilizer of the eggplants by 5.90kg/kg and 1.18% respectively.

The results show that the special fertilizer for the eggplants can keep the high yield of the eggplants and obviously improve the agricultural utilization rate and the apparent utilization rate of the nitrogen fertilizer for the eggplants under the premise of obviously reducing the using amount of nitrogen.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. A special fertilizer preparation method for facility eggplants based on yield response and soil fertility is characterized by comprising the following steps:

YR ═ Yaxk formula 1

YR ═ yield of fertilization plot-yield of vegetarian plot 2

Wherein Ya is the available yield, and k is the yield reaction coefficient;

M_{general assembly}YR 1000 AE 3

AE＝a×(YR)²+ b × (YR) + c formula 4

2. The special fertilizer preparation method for facility eggplants based on yield response and soil fertility as claimed in claim 1, wherein the yield response coefficient k in step (3) is based on soil fertility level and previous history data, and the relationship between yield and fertilizer yield increase effect in the facility eggplants planting area is established by regression analysis.

3. The special fertilizer preparation method for facility eggplants based on yield response and soil fertility as claimed in claim 2, wherein the corresponding relation between the yield response coefficient k and the soil fertility level is as follows: when the level of soil fertility is low, k_NIs 0.1975, k_PIs 0.1093, k_KIs 0.1609; when the soil fertility level is middle, k_NIs 0.1378, k_PIs 0.0832, k_KIs 0.1070; when the level of soil fertility is high, k_NIs 0.0700, k_PIs 0.0520, k_KIs 0.0745.

4. The special fertilizer preparation method for eggplants in facilities based on yield response and soil fertility as claimed in claim 1, wherein in step (3), the soil fertility level grades are classified into low, medium and high level grades according to soil organic matter content and the measurement result of available nitrogen nutrients, and the classification principle of the soil fertility level grades is as follows:

dividing principle of soil organic matter content: the soil organic matter content is less than 1.5%, 1.5% -2.5% and more than 2.5% respectively corresponding to the low, medium and high levels of the soil fertility level;

dividing the principle of the soil available nitrogen nutrient supply capacity: if the quick-acting nitrogen is more than 150mg/kg, upgrading the low grade and the medium grade corresponding to the measured value of the organic matter content into a medium grade and a high grade; and if the quick-acting nitrogen is less than 100mg/kg, degrading the corresponding high grade to the medium grade according to the measured value of the organic matter content.

5. The fertilizer preparation method for facility eggplants based on yield response and soil fertility as claimed in claim 1, wherein in step (3), the soil fertility level grades are classified into low, medium and high level grades according to the planting years of vegetables in the plots and with the aid of the information of soil texture, color and organic matter content in the plots, and the classification principle of the soil fertility level grades is as follows:

the planting age is less than 5 years, when the soil texture is slime and loam, the soil color is reddish or yellowish, gray or brown, or the organic matter content is medium or low, the soil fertility level is low; when the color of the soil is black or the content of organic matters in the soil is high, the soil fertility level is medium; the soil texture is sandy, and the soil fertility level is low;

the planting age is more than or equal to 10 years, the soil texture is sandy, and the soil fertility level is medium no matter how the soil color is or when the soil organic matter content is higher than a medium level; when the soil texture is slime and loam, no matter how the soil color is, or when the soil organic matter content is higher than a medium level, the soil fertility level is high.

6. The method for fertilizing and special for facility eggplants based on yield response and soil fertility as claimed in claim 1, wherein the numerical values of the coefficients a, b, c of the one-dimensional quadratic equation between the agronomic efficiency of the facility eggplants and the yield response of the facility eggplants in step (4) are obtained by fitting a binomial curve to the past 10-15 years test data of the facility eggplants.

7. The fertilizer preparation method for special eggplant to be used in facility based on yield response and soil fertility as claimed in claim 1, wherein the adjustment according to the fertilization measure in step (6) is to distribute the proportion of N, P fertilizer bases and K nutrients according to the fertilization rule in the whole growth period of the eggplant to be used in facility, and to distribute the proportions of the bases N, P and the total amount of the K nutrients provided by the special eggplant fertilizer to be used in the growth period; the special fertilizer for the facility eggplants is composed of a base fertilizer special fertilizer, a first additional fertilizer special fertilizer, a second additional fertilizer special fertilizer, a third additional fertilizer special fertilizer and a fourth additional fertilizer special fertilizer respectively; the basic N, P and K nutrient total amount distribution principle provided by the corresponding special fertilizer is as follows:

n nutrients: when N is present_{General assembly}When the fertilizer is more than or equal to 360kg/ha, the base application is carried out for 1 time and the additional application is carried out for 4 times, the distribution ratio of the special fertilizer for the base application, the special fertilizer for the first additional application, the special fertilizer for the second additional application, the special fertilizer for the third additional application and the special fertilizer for the fourth additional application N in the high, medium and low fertility soil of the facility eggplant is 15 to 30 to 10 percent respectively,20% -25% -30% -15% -10% and 25% -25% -20% -15% -15%; when N is present_{General assembly}<At 360kg/ha, basal application is carried out for 1 time and additional application is carried out for 3 times, and the distribution ratio of special basal application fertilizer, special first additional application fertilizer, special second additional application fertilizer and special third additional application fertilizer N for the eggplant plants in high, medium and low fertility soil is respectively 15% -30% -25%, 20% -30% -20% and 30% -25% -20%;

8. The fertilizer preparation method for special eggplants in facilities based on yield response and soil fertility as claimed in claim 1, wherein the specific preparation steps of the special blended fertilizer and/or compound fertilizer for the eggplants in facilities in step (6) are as follows:

9. A recommended application method of facility eggplant specific fertilizer based on yield response and soil fertility, characterized in that the calculation method for determining the application amount of the facility eggplant specific fertilizer based on yield response and soil fertility of any one of claims 1 to 8 comprises the following steps:

according to the special blended fertilizer and/or compound fertilizer N-P for the eggplant facility₂O₅-K₂The concentration w% of N nutrient in O grade and the total nitrogen application amount N in the whole growth period of the facility eggplant crops in corresponding planting areas_{General assembly}The fertilizer N special for the facility eggplants in the corresponding planting area accounts for the total nitrogen application amount N_{General assembly}The recommended application amount of the facility eggplant special fertilizer in the corresponding planting area is determined, and the recommended application amount is calculated by formula 5:

recommended application rate is N_{General assembly}X m%/w% of formula 5

Wherein m% is the percentage of the special fertilizer N for the facility eggplant in the total nitrogen application amount, and w% is the special mixed fertilizer and/or compound fertilizer N-P for the facility eggplant₂O₅-K₂Concentration of N nutrients in O grade.

10. The recommended application method of the fertilizer special for facility eggplants based on yield response and soil fertility according to claim 9, characterized in that the recommended application method is as follows:

when N is present_{General assembly}When the weight is more than or equal to 360kg/ha, basal application is carried out for 1 time, dressing application is carried out for 4 times, the basal application is respectively carried out before field planting, when the seedling stage is as long as 5 true leaves, when the seedling stage enters the growth stage, when the fruit has the egg size and when the fruit enters the fruit expansion stage, and the application is usually carried out at intervals of 10-15 days; in high, medium and low fertility soil, the recommended application rates of the facility eggplant base application special fertilizer, the first additional special fertilizer, the second additional special fertilizer, the third additional special fertilizer and the fourth additional special fertilizer are respectively as follows: n is a radical of_{General assembly}×15％/w％、N_{General assembly}×20％/w％、N_{General assembly}×25％/w％；N_{General assembly}×30％/w％、N_{General assembly}×25％/w％、N_{General assembly}×25％/w％；N_{General assembly}×30％/w％，N_{General assembly}×30％/w％、N_{General assembly}×20％/w％；N_{General assembly}×15％/w％、N_{General assembly}×15％/w％，N_{General assembly}×15％/w％；N_{General assembly}×10％/w％、N_{General assembly}×10％/w％、N_{General assembly}×15％/w％；

When N is present_{General assembly}<When the weight of the fruit is 360kg/ha, basal application is carried out for 1 time, and dressing is carried out for 3 times, wherein the basal application and the dressing are respectively carried out before field planting, when the seedling period is as long as 5 true leaves enter the growth period, when the fruit has the size of eggs and when the fruit enters the fruit expansion period; in high, medium and low fertility soil, the recommended application rates of the facility eggplant base application special fertilizer, the first dressing special fertilizer, the second dressing special fertilizer and the third dressing special fertilizer are respectively as follows: n is a radical of_{General assembly}×15％/w％、N_{General assembly}×20％/w％、N_{General assembly}×30％/w％；N_{General assembly}×30％/w％、N_{General assembly}×30％/w％、N_{General assembly}×25％/w％；N_{General assembly}×30％/w％、N_{General assembly}×30％/w％、N_{General assembly}×25％/w％；N_{General assembly}×25％/w％、N_{General assembly}×20％/w％、N_{General assembly}×20％/w％。