CN113248323B

CN113248323B - Organic-inorganic compound fertilizer containing humic acid and specially used for grapes

Info

Publication number: CN113248323B
Application number: CN202110764869.3A
Authority: CN
Inventors: 王峰; 马军伟; 林辉; 俞巧钢; 孙万春; 王强; 叶静
Original assignee: Zhejiang Academy of Agricultural Sciences
Current assignee: Zhejiang Academy of Agricultural Sciences
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2023-05-23
Anticipated expiration: 2041-07-07
Also published as: CN113248323A

Abstract

The invention belongs to the field of compound fertilizers required in agricultural production, and particularly relates to a special organic-inorganic compound fertilizer containing humic acid for grapes. It comprises the following steps: nitrogen fertilizer, phosphate fertilizer, potash fertilizer, medium element fertilizer, trace element fertilizer and humic acid; the humic acid content is more than or equal to 20 and wt percent; the compound fertilizer comprises the following active ingredients in percentage by mass: 6 to 10 percent of nitrogen wt percent, 1.8 to 3.0 percent of phosphorus pentoxide wt percent, 3.4 to 6 wt percent of potassium oxide and 0.2 to 0.6 wt percent of zinc; the nitrogen fertilizer consists of an organic nitrogen fertilizer and an inorganic nitrogen fertilizer, wherein the mass ratio of the organic nitrogen fertilizer to the inorganic nitrogen fertilizer is 1 (0.1-0.2); the organic nitrogen fertilizer comprises cooked soybeans; the medium element fertilizer is a silicon fertilizer; the trace element fertilizer is zinc salt. The compound fertilizer disclosed by the invention can meet the requirements of grape on nitrogen, phosphorus and potassium nutrients in different periods, and can effectively utilize biomass.

Description

Organic-inorganic compound fertilizer containing humic acid and specially used for grapes

Technical Field

The invention belongs to the field of compound fertilizers required in agricultural production, and particularly relates to a special organic-inorganic compound fertilizer containing humic acid for grapes.

Background

China is a large agricultural country, and has great demands for agricultural products and fertilizers required in the agricultural production process. The compound fertilizer is a common fertilizer, and generally refers to a fertilizer containing two or more than two nutrient elements, and has the advantages of high nutrient content, few side components, good physical properties and the like, and has very important effects of balancing fertilization, improving the utilization rate of the fertilizer and promoting the high and stable yield of crops. It has disadvantages such as that its nutrient ratio is always fixed, and the kinds, amounts and proportions of nutrient elements required for different soils, different crops are various.

However, the utilization rate of the existing compound fertilizer is low. In addition, in the grape planting process, it is generally necessary to perform fertilizer application in multiple times. If the early stage is mainly nitrogen fertilizer, the phosphorus fertilizer is sprayed and supplemented in the middle and late growth period of the fruits, and the coloring period is mainly potassium fertilizer. The existing fertilizer cannot realize the effect of ensuring long-term nutrient supply by single fertilization. Therefore, it is necessary to develop a compound fertilizer capable of realizing graded slow release as a special fertilizer for grapes.

Disclosure of Invention

The invention provides an organic-inorganic compound fertilizer special for grapes, which aims to solve the problems that the existing compound fertilizer can not meet different nutrient requirements of different stages of grape growth and can not directly meet the nutrient requirements of the stages of grape.

The invention aims at:

1. the main fertilizer component can be released in stages;

2. the requirements of the grape for nutrients in different growth periods can be met;

3. compared with other conventional fertilizers, the fertilizer can effectively reduce the fertilizing amount, effectively relieve soil acidification, improve the soil environment and realize the effects of energy conservation and environmental protection.

In order to achieve the above purpose, the present invention adopts the following technical scheme.

An organic-inorganic compound fertilizer containing humic acid special for grapes,

comprising the following steps:

nitrogen fertilizer, phosphate fertilizer, potash fertilizer, medium element fertilizer, trace element fertilizer and humic acid;

the humic acid content is more than or equal to 20 and wt percent;

the compound fertilizer comprises the following active ingredients in percentage by mass:

6 to 10 percent of nitrogen wt percent, 1.8 to 3.0 percent of phosphorus pentoxide wt percent, 3.4 to 6 wt percent of potassium oxide and 0.2 to 0.6 wt percent of zinc;

the nitrogen fertilizer consists of an organic nitrogen fertilizer and an inorganic nitrogen fertilizer, wherein the mass ratio of the organic nitrogen fertilizer to the inorganic nitrogen fertilizer is 1 (0.1-0.2);

the organic nitrogen fertilizer comprises cooked soybeans, wherein the cooked soybeans account for 5-10 wt% of the total mass of the compound fertilizer;

the medium element fertilizer is a silicon fertilizer, and the silicon fertilizer comprises diatomite and a silicon-carbon composite capsule;

the trace element fertilizer is soluble zinc salt.

In the technical scheme of the invention, the nitrogen fertilizer, the phosphate fertilizer and the potash fertilizer are mainly used for providing nitrogen, phosphorus and potassium elements required by grape growth, wherein the mass ratio of nitrogen, phosphorus and potassium is optimally 16:5:9, namely the mass ratio of nitrogen element, phosphorus pentoxide and potassium oxide. However, if the above-mentioned nutrient ratio is simply realized, the actual grape has poor nutrient absorption and utilization rate, and even the soil acidification problem occurs, so that the silicon fertilizer needs to be applied in a matching way. Silicon is an extremely important nutrient element for plants, a large number of crops have extremely high absorptivity to silicon and even higher absorptivity to three kinds of nutrients of nitrogen, phosphorus and potassium, and the application of the silicon fertilizer is beneficial to improving the photosynthesis capacity and insect disease resistance of the crops and has obvious effect of improving soil. In the invention, the silicon fertilizer mainly plays a role in absorbing and slowly releasing the phosphate fertilizer and the potassium fertilizer to form a graded release effect, the grape is mainly absorbed by the nitrogen fertilizer in early stage, part of the phosphate fertilizer and the potassium fertilizer are absorbed by the silicon fertilizer, and along with the growth of the grape crops, the silicon fertilizer is also continuously decomposed and absorbed to release the phosphate fertilizer and the potassium fertilizer released in the grape crops to form a graded fertilizer release. In addition, the addition of the silicon fertilizer can also effectively improve the colony environment of soil and the absorption and utilization rate of crops to phosphorus and potassium, improve the nutrient utilization rate of crops to compound fertilizers and correct the acidity of the soil.

Humic acid can enhance the absorption of grape crops to nitrogen, improve the absorption and utilization rate of crops to nitrogen, simultaneously can obviously improve the carbon content of the compound fertilizer, improve the organic carbon nutrient of soil, increase the porosity of the compound fertilizer, and improve the respiration environment of the roots of crops after fertilization. The trace element fertilizer can make up the defect of insufficient trace elements in the conventional compound fertilizer.

As a preferred alternative to this,

the organic nitrogen fertilizer also comprises organic matters fermented by composting;

the inorganic nitrogen fertilizer comprises urea or ammonium chloride or monoammonium phosphate or diammonium phosphate.

The inorganic nitrogenous fertilizers are common and easy to obtain, and the use effect of urea is actually optimal in the technical scheme of the invention. Therefore, research shows that under the combined action of humic acid and silicon fertilizer, urea can realize high-efficiency conversion, improve the efficiency and effect of nitrogen release, and can obviously improve the nutrient utilization rate of grape crops on nitrogen. The organic matters of the compost fermentation include, but are not limited to, common bean cakes, straw powder, peanut shells and the like. The organic matter dry matter weight is about 0.5 to 1 per mill of the ferment agent is added in the composting fermentation process. The composting fermentation process of the invention is added with 1 per mill of starter.

As a preferred alternative to this,

the phosphate fertilizer is monoammonium phosphate and/or diammonium phosphate and/or calcium superphosphate;

the potash fertilizer is potassium chloride.

As a preferred alternative to this,

at least 30% wt% of the phosphate fertilizer is adsorbed in the diatomite;

the potash fertilizer has at least 50 wt% adsorbed in the silicon-carbon composite capsule.

The adsorbed phosphate fertilizer and potassium fertilizer cannot be directly absorbed by grape crops in early stage, and the grape is required to be continuously decomposed in the growth process and released after absorbing the silicon fertilizer, so that the grape can be further absorbed. According to the requirements of different nutrients in different periods of actual grape growth, such as the maximum requirement of nitrogen in early stage, nitrogen is not adsorbed, the requirement of phosphorus in middle stage is large, diatomite is easier to decompose and absorb by grape than a silicon-carbon composite capsule, and therefore when the fruit in middle stage of grape flowering period is enlarged, the phosphate fertilizer in the diatomite is gradually released to improve the phosphate fertilizer supply to grape in the stage. And then the silicon-carbon composite capsule is slowly decomposed and then the supplementary potash fertilizer supply is released just before the coloring period. Compared with the conventional compound fertilizer, the compound fertilizer can effectively improve the nutrient utilization rate of the fertilizer, can effectively realize the periodic supply of grape nutrients, and reduces the additional fertilizer amount in the grape expanding period and the coloring period. It also ensures that sufficient nutrient supply is available throughout the grape period when fertilizer is applied in reduced quantities.

In addition, diatomaceous earth used in the present invention requires special treatment. Because the conventional grape has weak decomposition and absorption capacity to the conventional diatomite, the release of the phosphate fertilizer may miss the optimal time, so that the phosphate fertilizer cannot be timely supplemented in the fruit expanding period of the grape. Thus, diatomaceous earth was subjected to the following treatment: the diatomite and the alkali metal hydroxide are mixed according to the mass ratio of 1 (0.3-0.4), react at the temperature of 90-110 ℃ for 1-2 h, then quickly cool to the temperature of less than or equal to 30 ℃ within 2 min, and pass through a 20-mesh sieve and a 80-mesh sieve after being crushed, so that 20-80-mesh hydrated diatomite powder is obtained, namely the diatomite has good adsorptivity and is beneficial to grape decomposition and absorption.

As a preferred alternative to this,

the method for adsorbing the phosphate fertilizer by the diatomite comprises the following steps:

placing diatomite into a saturated phosphorus fertilizer aqueous solution, adsorbing, standing until the diatomite is saturated, filtering to obtain diatomite adsorbed with phosphorus fertilizer, and coating a plate with the residual solution and drying to obtain residual phosphorus fertilizer;

the method for adsorbing the potash fertilizer by the silicon-carbon combined capsule comprises the following steps:

dissolving polyethylene glycol-polycaprolactone segmented copolymer in petroleum ether containing 0.3-0.5 mol/L of tetraethoxysilane to prepare 20-30 mmol/L of pre-solution, adding oil-soluble phenolic resin into the pre-solution according to the proportion of 0.8-1.1 mol/L to obtain mixed solution, preparing a potash fertilizer into saturated aqueous solution, and mixing the saturated aqueous solution with the mixed solution according to the proportion of (3-6): mixing and stirring the materials according to the volume ratio of 100 to form turbid liquid, coating and drying the turbid liquid to obtain the silicon-carbon composite capsule adsorbed with the potash fertilizer, separating the residual solution, and coating and drying the aqueous layer solution to obtain the residual potash fertilizer.

In the above method, the adsorption of the phosphate fertilizer is mainly based on the surface activity and porous adsorption of the diatomaceous earth itself.

The adsorption of the potash fertilizer is carried out by self-loading and coating of the block copolymer. In petroleum ether, the polycaprolactone end of the block copolymer reacts with phenolic resin to form a preliminary assembly effect, in the process of mixing the mixed solution and the saturated aqueous solution of potash fertilizer, hydrophilic insertion liquid drops are arranged at the polyethylene glycol end of the block copolymer, and the tetraethoxysilane is hydrolyzed in the liquid drops to form silicon dioxide, the ionic potash fertilizer is captured through the surface activity and the porous adsorptivity of the silicon dioxide, the potash fertilizer is adsorbed and encapsulated, and finally the silicon-carbon composite capsule adsorbed with the potash fertilizer is formed.

As a preferred alternative to this,

the mass ratio of the diatomite to the silicon-carbon composite capsule is (5.5-7): (3-4.5).

As a preferred alternative to this,

the trace element fertilizer is zinc sulfate.

The beneficial effects of the invention are as follows:

1) Compared with the existing special grape compound fertilizer, the compound fertilizer disclosed by the invention can adapt to the nutrient requirements of the grape on nitrogen, phosphorus and potassium in different periods, and the nutrient utilization rate of the grape on the compound fertilizer is obviously improved;

2) The nutrient content in the soil can be kept stable for a long time, the ineffective loss of the nutrient is reduced, and good soil fattening and long-acting slow release effects are realized;

3) The fruits of the grapes can be obviously enlarged;

4) The additional fertilizer amount of phosphate fertilizer and potash fertilizer can be reduced by more than 60 and wt percent, the acidified soil environment is improved, and the method is more energy-saving and environment-friendly;

5) Realizing effective utilization of biomass.

Detailed Description

The present invention will be described in further detail with reference to specific examples. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. In addition, the embodiments of the present invention referred to in the following description are typically only some, but not all, embodiments of the present invention. Therefore, all other embodiments, which can be made by one of ordinary skill in the art without undue burden, are intended to be within the scope of the present invention, based on the embodiments of the present invention.

The raw materials used in the examples of the present invention are all commercially available or available to those skilled in the art unless specifically stated otherwise; the methods used in the examples of the present invention are those known to those skilled in the art unless specifically stated otherwise.

The irrigation of the invention is carried out by adopting a conventional dry-wet alternate irrigation mode: and (3) controlling the water potential of the soil to be-15 kPa when the soil naturally falls from the shallow water layer, and irrigating 1-2 cm for circulation.

The diatomaceous earth used in the examples of the present invention was subjected to the following treatments, unless otherwise specified: the diatomite and the sodium hydroxide are mixed according to the mass ratio of 1:0.4, react at 105 ℃ for 1.5 h, then quickly cool to be less than or equal to 30 ℃ within 2 min, and pass through a 20-mesh sieve and a 80-mesh sieve after being crushed, so as to obtain the diatomite powder with the mesh number of 20-80 meshes.

Example 1

the composition is shown in table 1 below.

TABLE 1 composition of the Compound fertilizer of example 1

In the fertilizer of the embodiment, diatomite is placed in a saturated phosphorus fertilizer aqueous solution, adsorbed and kept stand until saturated, the diatomite adsorbed with the phosphorus fertilizer is obtained by filtering, and the residual solution is coated on a board and dried to obtain the residual phosphorus fertilizer; dissolving a polyethylene glycol-polycaprolactone block copolymer in petroleum ether containing 0.4 mol/L of tetraethoxysilane to prepare 25 mmol/L of pre-solution, adding oil-soluble phenolic resin into the pre-solution according to the proportion of 1.0 mol/L to obtain mixed solution, preparing a potash fertilizer into a saturated aqueous solution, and mixing the saturated aqueous solution with the mixed solution according to the proportion of 5: mixing and stirring the materials according to the volume ratio of 100 to form turbid liquid, coating and drying the turbid liquid to obtain the silicon-carbon composite capsule adsorbed with the potash fertilizer, separating the residual solution, and coating and drying the aqueous layer solution to obtain the residual potash fertilizer.

The total amount of the fertilizer is 200 kg. Through detection analysis, in the fertilizer prepared by the embodiment, the nitrogen content is 9wt%, the phosphorus pentoxide content is 2.8wt%, the potassium oxide content is 5.1 wt%, and the zinc content is 0.4 wt%.

The fertilizer prepared in this example was labeled S1.

Example 2

the constitution thereof is shown in the following table 2.

TABLE 2 composition of the Compound fertilizer of example 2

In the fertilizer of the embodiment, diatomite is placed in a saturated phosphorus fertilizer aqueous solution, adsorbed and kept stand until saturated, the diatomite adsorbed with the phosphorus fertilizer is obtained by filtering, and the residual solution is coated on a board and dried to obtain the residual phosphorus fertilizer; dissolving a polyethylene glycol-polycaprolactone block copolymer in petroleum ether containing 0.5 mol/L of tetraethoxysilane to prepare a pre-solution with the concentration of 30 mmol/L, adding oil-soluble phenolic resin into the pre-solution in the proportion of 1.1 mol/L to obtain a mixed solution, preparing a potash fertilizer into a saturated aqueous solution, and mixing the saturated aqueous solution with the mixed solution according to the proportion of 6: mixing and stirring the materials according to the volume ratio of 100 to form turbid liquid, coating and drying the turbid liquid to obtain the silicon-carbon composite capsule adsorbed with the potash fertilizer, separating the residual solution, and coating and drying the aqueous layer solution to obtain the residual potash fertilizer.

The total amount of the fertilizer is 200 kg. Through detection analysis, in the fertilizer prepared by the embodiment, the nitrogen content is 9.8 percent wt percent, the phosphorus pentoxide content is 2.9 weight percent, the potassium oxide content is 6 wt percent, and the zinc content is 0.6 wt percent.

The fertilizer prepared in this example was labeled S2.

Example 3

the composition is shown in Table 3 below.

TABLE 3 composition of the Compound fertilizer of example 3

In the fertilizer of the embodiment, diatomite is placed in a saturated phosphorus fertilizer aqueous solution, adsorbed and kept stand until saturated, the diatomite adsorbed with the phosphorus fertilizer is obtained by filtering, and the residual solution is coated on a board and dried to obtain the residual phosphorus fertilizer; dissolving a polyethylene glycol-polycaprolactone block copolymer in petroleum ether containing 0.3 mol/L of tetraethoxysilane to prepare 20 mmol/L of pre-solution, adding oil-soluble phenolic resin into the pre-solution according to the proportion of 0.8 mol/L to obtain mixed solution, preparing a potash fertilizer into a saturated aqueous solution, and mixing the saturated aqueous solution with the mixed solution according to the proportion of 3: mixing and stirring the materials according to the volume ratio of 100 to form turbid liquid, coating and drying the turbid liquid to obtain the silicon-carbon composite capsule adsorbed with the potash fertilizer, separating the residual solution, and coating and drying the aqueous layer solution to obtain the residual potash fertilizer.

The total amount of the fertilizer is 200 kg. Through detection analysis, in the fertilizer prepared by the embodiment, the nitrogen content is 6 wt%, the phosphorus pentoxide content is 1.8wt%, the potassium oxide content is 3.4 wt%, and the zinc content is 0.2 wt%.

The fertilizer prepared in this example was labeled S3.

Comparative example 1

The specific compound fertilizer composition is the same as in example 1, except that:

the diatomaceous earth was 60 mesh diatomaceous earth commercially available.

The fertilizer prepared in this comparative example is designated D1.

Comparative example 2

no silicon fertilizer is added, and the same mass of straw is used for replacing the silicon fertilizer.

The fertilizer prepared in this comparative example is labeled D2.

Comparative example 3

the silicon-carbon composite particles in the silicon fertilizer are replaced by equivalent straws.

The fertilizer prepared in this comparative example was D3.

Comparative example 4

The proportion of nitrogen, phosphorus and potassium (nitrogen element, phosphorus pentoxide and potassium oxide) in the conventional compound fertilizer is 16:5:9, the content is basically the same as that of the example 1, and the content difference of the nitrogen element, the phosphorus pentoxide and the potassium oxide is less than or equal to 0.3 wt percent.

The fertilizer prepared in this comparative example was D4.

Testing

Experiments were performed on the above example 1 and comparative examples 1 to 3.

Dividing test areas in greenhouse areas of Kyoho grapes planted for 6 years, wherein the area of each test area is 30 m ² A one-year incubation test was performed. The following test groups were set up. The details are shown in Table 4 below.

TABLE 4 specific test group settings

During grape cultivation, 5 soil samples were randomly collected per day for each test group and sampled by the quartering method after uniform mixing. And after the soil sample is collected, air-drying and sieving are performed for measuring physicochemical properties. The organic matters in the soil adopt a potassium dichromate-sulfuric acid oxidation method. Soil total nitrogen and alkaline hydrolysis nitrogen are respectively measured by a semi-trace Kjeldahl nitrogen determination method and a sodium hydroxide hydrolysis diffusion method. Available phosphorus is prepared from hydrochloric acid-ammonium fluoride according to the following steps: liquid=1:10 ratio post-leaching colorimetric determination. Quick-acting Potassium utilization 1 mol ∙ L ^-1 Ammonium acetate was prepared according to the following procedure: liquid=1:10 ratio is determined by flame photometry after leaching.

Data processing and statistical analysis were performed using Microsoft Excel 2010 and SPSS 13.0, multiple comparisons and difference significance detection (P < 0.05) were performed using Duncan new complex polar difference method, and mapping was performed using SigmaPlot 10.0.

Taking the test result within ten days after fertilization as initial data, wherein the test result in the grape expansion period is middle-term data, and the test result in the grape coloring period is later-term data.

The recorded data are shown in table 5 below.

TABLE 5 average value of soil key nutrient measurements at different periods of planting land in grape greenhouse

From the data in the table, it is obvious that the diatomite of the invention can very effectively realize slow release of the phosphate fertilizer and can release in time in the expansion period. Comparing the SD1 test group and the SD4 test group, it can be seen that the SD1 can effectively and timely release a large amount of available phosphorus in the middle fruit expanding period, and in daily environment, the modified release form can effectively keep the consumption of phosphate fertilizer and the natural loss of phosphorus in the low demand period, while the SD4 test group shows the increase of the available phosphorus content in the middle period, but the increase of the opportunity is smaller, and the relatively higher available phosphorus content is maintained in the later coloring period, so that the release is not timely. And comparing SD1 and SD5 test groups, it is obvious that the silicon fertilizer can be very effectively controlled-release.

Comparing SD1 and SD6, it can be seen that the silicon-carbon composite capsule has great significance for quick-acting potassium slow release of fertilizer. After the silicon-carbon composite particles are replaced by the straws, the quick-acting potassium content is continuously reduced, and an obvious rising period does not exist.

As is obvious from comparison of SD1, SD7 and SD8, the compound fertilizer provided by the invention can reduce the application amount, but can completely meet the nutrient requirements of grapes in each stage of the SD8 traditional test group. The fertilizer can also keep the effectiveness of fertilizer application on the basis of decrement fertilizer application, and is very green and environment-friendly.

Based on the above, calculation statistics are performed on the actual grape yield.

Test group	Yield (kg/hm) ² ）	Test group	Yield (kg/hm) ² ）
				SD1	4698.3	SD5	4096.1
SD2	4782.4	SD6	4203.4
				SD3	4702.5	SD7	4186.3
SD4	4137.4	SD8	4873.2

It is evident from the above table that after each period of insufficient nutrient, there is a very significant drop in yield. However, the invention can maintain higher yield to a great extent under the conditions of reduced fertilization and no additional fertilization through slow release of fertilizer components, can remarkably improve the economic benefit of actual grape farmers, reasonably and effectively utilizes various wastes, humus and waste organic matters, and is quite green and environment-friendly.

Further, the glucose levels, vc, titratable acid and soluble solids of the SD1 to SD3 and SD8 test groups were examined. The detection calculation means are shown in the following table.

Test group	Sugar degree	Vc (100 mg/kg)	Titratable acid (%)	Soluble solids (%)
					SD1	20.2	6.951	0.5838	23.8
SD2	20.9	6.811	0.6029	23.8
					SD3	20.4	7.050	0.6061	24.3
SD8	20.8	7.079	0.6039	23.7

As apparent from the data in the table, the fertilizer can supply the grape with the fertilizer in each growth stage in stages and gradients under the condition of single application of decrement, greatly reduces the fertilizer application amount, but basically keeps the yield and quality of the grape, effectively and reasonably utilizes various component substances and meets the green agricultural standard.

Claims

1. An organic-inorganic compound fertilizer containing humic acid special for grapes is characterized in that,

comprising the following steps:

the humic acid content is more than or equal to 20 and wt percent;

the trace element fertilizer is soluble zinc salt;

at least 30% wt% of the phosphate fertilizer is adsorbed in the diatomite;

at least 50% wt% of the potash fertilizer is adsorbed in the silicon-carbon composite capsule;

the diatomite is treated by the following steps:

mixing diatomite and alkali metal hydroxide in a mass ratio of 1 (0.3-0.4), reacting at 90-110 ℃ for 1-2 h, then cooling to be less than or equal to 30 ℃ within 2 min, crushing and sieving to obtain 20-80 mesh hydrated diatomite powder;

the method for adsorbing the potash fertilizer by the silicon-carbon composite capsule comprises the following steps:

2. The organic-inorganic compound fertilizer containing humic acid for grapes according to claim 1, wherein the organic-inorganic compound fertilizer is prepared from the following components,

the inorganic nitrogen fertilizer is urea or ammonium chloride or monoammonium phosphate or diammonium phosphate.

3. The organic-inorganic compound fertilizer containing humic acid for grapes according to claim 1, wherein the organic-inorganic compound fertilizer is prepared from the following components,

the potash fertilizer is potassium chloride.

4. The organic-inorganic compound fertilizer containing humic acid for grapes according to claim 1, wherein the organic-inorganic compound fertilizer is prepared from the following components,

the mass ratio of the diatomite to the silicon-carbon composite capsule is (3-4.5): (5.5-7).

5. The organic-inorganic compound fertilizer containing humic acid for grapes according to claim 1, wherein the organic-inorganic compound fertilizer is prepared from the following components,

the trace element fertilizer is zinc sulfate.