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Corn slow-release fertilizer

A slow-release fertilizer and corn technology, which is applied in fertilization devices, fertilizer mixtures, agriculture, etc., can solve the problems of unfavorable food crop promotion and application, non-biodegradable coating materials, and narrow crop range, so as to improve the controlled release performance and nitrogen The utilization rate of the element is beneficial to the absorption and continuous utilization, and the effect of ensuring the degradability

Inactive Publication Date: 2012-04-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing organic polymer-coated fertilizers have the following problems: (1) the coating material is not biodegradable and easily causes "white pollution", (2) the production cost is high, (3) the range of applicable crops is narrow, and it is only suitable for horticultural crops, lawns, Golf courses and ornamental plants, etc., are 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

[0016] Embodiment 1: the preparation of corn slow-release fertilizer

[0017] (1) Take the following components by weight (unit: kilogram):

[0018]

[0019] 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 24:6:7.5:0.15:45.

[0020] (2) Use the disk method to first (NH 4 ) 2 HPO 4 、K 2 SO 4 1. Large-grain urea (average particle diameter is 1.6-2.5mm) is mixed with diatomaceous earth and granulated to make the core of fertilizer granules. The average particle diameter of the fertilizer granules is 0.7-1.5cm;

[0021] (3) get the hydroxypropyl methylcellulose, oxidized starch, polyvinyl phthalate (PVAP) of described weight ratio respectively, then will be poured into the container that fills Tween 80 and deionized water , at 28°C, shear and emulsify at 10000r / mim for 35mim to obtain a polymer emulsion;

[0022] (4) Pour the ...

Embodiment 2

[0024] Embodiment 2: the preparation of corn slow-release fertilizer

[0025] (1) Take the following components by weight (unit: kilogram):

[0026]

[0027] Wherein: the polymer is made of the following components by weight ratio: hydroxypropyl methylcellulose: oxidized starch: polyvinyl phthalate: Tween 80: deionized water is 24:6 :7.5:0.15:45.

[0028] (2) Use the disk method to first (NH 4 ) 2 HPO 4 、K 2 SO 4 1. Large granule urea (average particle size is 1.6-2.5mm) is mixed with diatomaceous earth and granulated to make the core of fertilizer granules;

[0029] (3) get the hydroxypropyl methylcellulose, oxidized starch, polyvinyl phthalate (PVAP) of described weight ratio respectively, then will be poured into the container that fills Tween 80 and deionized water , at 25°C, shear and emulsify at 10000r / mim for 30mim to obtain a polymer emulsion;

[0030] (4) Pour the fertilizer granules made in step (2) into the heating and drying drum, roll and preheat to 70°...

Embodiment 3

[0032] Embodiment 3: the preparation of corn slow-release fertilizer

[0033] (1) Take the following components by weight (unit: kilogram):

[0034]

[0035] Wherein: the polymer is made of the following components by weight ratio: hydroxypropyl methylcellulose: oxidized starch: polyvinyl phthalate: Tween 80: deionized water is 24:6 :7.5:0.15:45.

[0036] (2) Use the disk method to first (NH 4 ) 2 HPO 4 、K 2 SO 4 1. Large granule urea (average particle size is 1.6-2.5mm) is mixed with diatomaceous earth and granulated to make the core of fertilizer granules;

[0037] (3) get the hydroxypropyl methylcellulose, oxidized starch, polyvinyl phthalate (PVAP) of described weight ratio respectively, then will be poured into the container that fills Tween 80 and deionized water , at 30°C, shear and emulsify at 10000r / mim for 50mim to obtain a polymer emulsion;

[0038] (4) Pour the fertilizer granules made in step (2) into the heating and drying drum, roll and preheat to 80°...

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Abstract

The invention discloses a corn slow-release fertilizer. The corn slow-release fertilizer is prepared by uniformly spraying a layer of water-soluble high molecular polymer on the surface of fertilizer particles, and comprises the following ingredients: 8.5-9.5 weight portions of (NH4)2HPO4, 5.5-6.5 weight portions of K2SO4, 30-32 weight portions of large particle urea, 8-10 weight portions of diatomite, and 22-24 weight portions of high molecular polymer. The corn slow-release fertilizer effectively overcomes nitrogen loss caused in fertilizing, increases the utilization rate of nitrogenous fertilizers, benefits the absorption and continuous utilization of crops, fully makes full use of the effects of fertilizers, and simultaneously increases the yield of corn. The corn slow-release fertilizer conforms to the policy guidance of developing energy saving, environment friendly, and continuously efficient agriculture.

Description

technical field [0001] The invention relates to a slow-release fertilizer, in particular to a corn slow-release fertilizer. Background technique [0002] Corn is a crop that needs more nitrogen, and it needs sufficient nitrogen fertilizer supply to obtain higher yields. However, one of the most prominent problems in the use of chemical fertilizers is the low utilization rate of nitrogen, and the economic losses and environmental pollution caused by the large-scale application of nitrogen fertilizers. How to greatly improve the utilization rate of chemical nitrogen fertilizer and give full play to the role of chemical fertilizer is one of the most prominent problems in the development of resource-saving, environment-friendly, sustainable and efficient agriculture. [0003] The invention and solution of the slow-release fertilizer has opened up a new thinking and a more effective way for the above-mentioned problems. However, the existing organic polymer-coated fertilizers h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G3/90
Inventor 张尚立张恒常宏文马剑峰王丽王萍
Owner SHANDONG UNIV
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