Special controlled-release fertilizer for lotus roots and preparation method thereof

A technology of controlled release fertilizer and lotus root, applied in the application, nitrogen fertilizer, potassium fertilizer and other directions, can solve problems such as large complexity and achieve the effect of sufficient nutrients

Inactive Publication Date: 2017-02-15
GUIZHOU KAILIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the controlled-release fertilizers commonly used in the market are mostly developed for terrestrial plants. Since aquatic plants such as lotus roots grow in water, the use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Formula: by weight, 140 parts of urea, 120 parts of potassium chloride, 90 parts of calcium phosphate, 8 parts of trace element fertilizer, 5 parts of 3,4-dimethylpyrazole phosphate, 6 parts of polyvinylamide, inner bag 9 parts of film, 14 parts of outer film. Wherein the trace element fertilizer is composed of 3 parts of borax, 3 parts of zinc sulfate, and 2 parts of manganese sulfate; wherein the inner coating agent is composed of 4 parts of polylactic acid, 3 parts of polyethylene glycol, and 2 parts of ethanol; the outer coating agent It is composed of 6 parts by weight of polyacrylate, 1 part of EPDM rubber, 3 parts of modified starch, 2 parts of acetone and 2 parts of water; wherein the molecular weight of polyethylene glycol is 2000, the molecular weight of polyacrylate is 500, and the molecular weight of polyacrylate is 500. The molecular weight of lactic acid is 3000.

[0037] Preparation method: 1) preparation of fertilizer core

[0038] Add urea, potassium ...

Embodiment 2

[0045]Formula: by weight, 200 parts of urea, 170 parts of potassium chloride, 140 parts of calcium phosphate, 15 parts of trace element fertilizer, 9 parts of 3,4-dimethylpyrazole phosphate, 10 parts of polyvinylamide, inner bag 23 parts of film preparation, 32 parts of outer film preparation. Wherein the trace element fertilizer is composed of 6 parts of borax, 5 parts of zinc sulfate, and 4 parts of manganese sulfate; wherein the inner coating agent is composed of 10 parts of polylactic acid, 9 parts of polyethylene glycol, and 4 parts of ethanol; the outer coating agent It is composed of 15 parts by weight of polyacrylate, 4 parts of EPDM rubber, 5 parts of modified starch, 4 parts of acetone and 4 parts of water; wherein the molecular weight of polyethylene glycol is 5000, the molecular weight of polyacrylate is 2000, and the molecular weight of polyacrylate is 2000. The molecular weight of lactic acid is 6000.

[0046] Preparation method: 1) preparation of fertilizer cor...

Embodiment 3

[0054] Formula: by weight, 180 parts of urea, 150 parts of potassium chloride, 120 parts of calcium phosphate, 13 parts of trace element fertilizer, 6 parts of 3,4-dimethylpyrazole phosphate, 8 parts of polyvinylamide, inner bag 17 parts of film dosage, 26 parts of outer coating dosage. Wherein the trace element fertilizer is composed of 5 parts of borax, 5 parts of zinc sulfate, and 3 parts of manganese sulfate; wherein the inner coating agent is composed of 7 parts of polylactic acid, 7 parts of polyethylene glycol, and 3 parts of ethanol; the outer coating agent It consists of 13 parts by weight of polyacrylate, 2 parts of EPDM rubber, 4 parts of modified starch, 3 parts of acetone, and 4 parts of water; wherein the molecular weight of polyethylene glycol is 4000, the molecular weight of polyacrylate is 1000, and the molecular weight of polyacrylate is 1000. The molecular weight of lactic acid is 4000.

[0055] Preparation method: 1) preparation of fertilizer core

[0056...

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PUM

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Abstract

The invention discloses a special controlled-release fertilizer for lotus roots and a preparation method thereof. The preparation method comprises the following steps of preparing a fertilizer core by urea, potassium chloride, calcium phosphate, a trace element fertilizer, an inhibitor and a dispersant; performing inner coating treatment on the fertilizer core by an inner coating film agent which is prepared from polylactic acid, polyethylene glycol and ethyl alcohol; performing outer coating treatment on the fertilizer core by an outer coating film agent which is prepared from polyacrylate, ethylene propylene diene monomer, modified starch, acetone and water, so as to obtain the special controlled-release fertilizer for the lotus roots. Compared with the prior art, the special controlled-release fertilizer has the advantages that the nutrient elements in the fertilizer are rich, the utilization rate of a nitrogen fertilizer is high, the controlled-release property is good, and the nutrient requirement of the lotus root in each growth period is met; the outer coating can be recycled, so that the environment-friendly effect is realized; the inner coating can be completely degraded, so that the danger to surrounding environment is avoided.

Description

technical field [0001] The invention relates to the field of controlled-release fertilizers, in particular to a special controlled-release fertilizer for lotus roots and a preparation method thereof. Background technique [0002] The nutrients needed by the lotus root during its growth and development come from the photosynthesis of the lotus leaves on the one hand; Although the feces and residual bait of the fish can provide a certain amount of nutrients for the lotus root, it is very little compared with the growth demand of the lotus root, so it must be topdressed in time. The growth period of lotus root is long, and it is generally topdressed 2-3 times. Let off the field water before each fertilization, so that the fertilizer can be absorbed into the water, and then irrigate to the original depth. In deep-water lotus root fields, fertilizers are easy to lose, and liquid fertilizers cannot be applied directly. The method of solid fertilizer application should be adopted...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B7/00C05G3/00C05G5/30C05C9/00C05D1/02C05D9/00C05D9/02
Inventor 何花彭宝林张伟唐丽君赵会媛韩朝应
Owner GUIZHOU KAILIN GRP CO LTD
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