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Leaf vegetable release-controlling fertilizer

A technology for controlled-release fertilizers and vegetables, applied in potassium fertilizers, nitrogen fertilizers, phosphate fertilizers, etc., can solve the problem that it is only suitable for horticultural crops, lawns, golf courses and ornamental plants, it is difficult to strictly control the nutrient release rate, and the coating material is biodegradable, etc. problems, to achieve the effect of expanding the scope of applicable crops, facilitating absorption and utilization, and ensuring degradability

Inactive Publication Date: 2010-06-02
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with inorganic-coated fertilizers is that ① it is difficult to strictly control the release rate of their nutrients, because the sulfur coating is brittle, and the film shell will rupture during the process of nutrient release, resulting in the sudden release of all nutrients in the film, also known as " "Destructive release" will often cause damage to the root system of crops; ②After a large amount of sulfur shells are decomposed by microorganisms in the soil, it is easy to cause soil acidification; ③Sulphur-coated urea also has the problem that the sulfur coating is easy to oxidize and break, which is not conducive to handling
The problems of organic polymer coated fertilizers are that ① the coating material is not biodegradable, and it is easy to cause "white pollution", ② the production cost is high, ③ the applicable crop range is narrow, and it is only suitable for horticultural crops, lawns, golf courses and ornamental plants etc., which is not conducive to the promotion and application of food crops

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Preparation of Leafy Vegetable Controlled Release Fertilizer

[0032] (1) Take the following components by weight (unit: kilogram):

[0033] (NH 4 ) 2 HPO 4 15

[0034] (NH 4 ) 2 SO 4 4

[0035] NH 4 Cl 15

[0036] K 2 SO 4 38

[0037] Superphosphate 12

[0038] Diatomaceous earth 10

[0039] Polymer 23;

[0040] Wherein: the high-molecular polymer is made of the following components by weight ratio: hydroxypropyl methylcellulose: oxidized starch: polyvinyl phthalate (PVAP): Tween 80: deionized water is 25:5:8:0.1:46.

[0041] (2) Use the disk method to first (NH 4 ) 2 HPO 4 , (NH 4 ) 2 SO 4 , NH 4 Cl, K 2 SO 4 1. Calcium superphosphate is mixed with diatomaceous earth and granulated to make the core of fertilizer granules;

[0042] (3) Get the hydroxypropyl methylcellulose, oxidized starch, polyvinyl phthalate (PVAP), Tween 80 and deionized water of the weight ratio respectively, and first mix the components Tween ...

Embodiment 2

[0045] Example 2: Preparation of Leafy Vegetable Controlled Release Fertilizer

[0046] (1) Take the following components by weight (unit: kilogram):

[0047] (NH 4 ) 2 HPO 4 14

[0048] (NH 4 ) 2 SO 4 3

[0049] NH 4 Cl 13

[0050] K 2 SO 4 35

[0051] SSP 8

[0052] Diatomaceous earth 7

[0053] Polymer 20;

[0054] Wherein: the high-molecular polymer is made of the following components by weight ratio: hydroxypropyl methylcellulose: oxidized starch: polyvinyl phthalate: Tween 80: deionized water is 20:3 :6:0.01:40.

[0055] (2) Use the disk method to first (NH 4 ) 2 HPO 4 , (NH 4 ) 2 SO 4 , NH 4 Cl, K 2 SO 4 1. Calcium superphosphate is mixed with diatomaceous earth and granulated to make the core of fertilizer granules;

[0056] (3) Get the hydroxypropyl methylcellulose, oxidized starch, polyvinyl phthalate (PVAP), Tween 80 and deionized water of the weight ratio respectively, and first mix the components Tween 80 and Mix deionize...

Embodiment 3

[0059] Example 3: Preparation of Leafy Vegetable Controlled Release Fertilizer

[0060] (1) Take the following components by weight (unit: kilogram):

[0061] (NH 4 ) 2 HPO 4 16

[0062] (NH 4 ) 2 SO 4 5

[0063] NH 4 Cl 20

[0064] K 2 SO 4 40

[0065] tsp 15

[0066] Diatomaceous earth 12

[0067] Polymer 25;

[0068] Wherein: the high-molecular polymer is made of the following components by weight ratio: hydroxypropyl methylcellulose: oxidized starch: polyvinyl phthalate: Tween 80: deionized water is 30:6 :10:0.2:50.

[0069] (2) Use the disk method to first (NH 4 ) 2 HPO 4 , (NH 4 ) 2 SO 4 , NH 4 Cl, K 2 SO 4 1. Calcium superphosphate is mixed with diatomaceous earth and granulated to make the core of fertilizer granules;

[0070] (3) Get the hydroxypropyl methylcellulose, oxidized starch, polyvinyl phthalate (PVAP), Tween 80 and deionized water of the weight ratio respectively, and first mix the components Tween 80 and Mix deio...

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PUM

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Abstract

The invention discloses a controlled release fertilizer of leafy vegetable, which is composed of the following components with the following weight proportion, (NH4)2HPO4 taking 14-16, (NH4)2SO4 taking 3-5, NH4Cl taking 13-20, K2SO4 taking 35-40, calcium superphosphate taking 8-15, diatomite taking 7-12 and high molecular polymer taking 20-25. The controlled release fertilizer of leafy vegetable effectively holds the rule of the fertilizer efficiency releasing and the fertilizer requirement of the leafy vegetable and achieves the anastomosis of the releasing peak of the azophoska fertilizer and the peak of leafy vegetable absorbing azophoska, thereby being more beneficial to the absorbability and the utilization of the fertilizer, decreasing fertilizing frequency, saving time and fertilizing amount, having perfect economic benefit and social benefit.

Description

technical field [0001] The invention relates to a controlled-release fertilizer, in particular to a controlled-release fertilizer for leafy vegetables. Background technique [0002] Chemical fertilizers are commonly and widely used as conventional fertilizers in crop planting, and they are easy to apply and have outstanding effects. However, there are many problems in the use of chemical fertilizers. One of the most prominent problems is the low nitrogen use efficiency and the resulting The economic loss and environmental pollution caused by the large-scale application of nitrogen fertilizer. How to greatly improve the nitrogen use efficiency of chemical nitrogen fertilizers and give full play to the role of chemical fertilizers is one of the most prominent problems in the development of resource-saving, environment-friendly, sustainable and efficient agriculture. The recent development of agricultural technology shows that: the role of controlled-release fertilizers The in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/06C05G3/00C05B7/00C05C3/00C05D1/02C05B1/02
Inventor 常宏文张恒马剑峰
Owner SHANDONG UNIV