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Slow-release composite fertilizer

A compound fertilizer and slow-release technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of environmental pollution, high cost, and difficult to degrade coating materials, and achieve the effect of improving soil, low cost, and easy degradation.

Inactive Publication Date: 2012-07-04
王海炜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Resin coating, high cost, and the coating material is difficult to degrade, polluting the environment

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.

[0019] A slow-release compound fertilizer, the weight ratio of each component is as follows: urea 40-60, monoammonium phosphate or heavy calcium 10-30, potassium chloride or potassium sulfate 10-35, granulation auxiliary material 5-30, nanoscale shell Polysaccharide-modified attapulgite 3-5, nanoscale chitosan coating agent 1-2, and water-retaining agent 10-40.

[0020] Water-retaining agent, also known as super water-absorbing agent or polymer water-absorbing resin, is a polymer material with special functions. Water retention agent not only has excellent water absorption and water retention, but also can form agglomerate structur...

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PUM

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Abstract

The present invention relates to a slow-release composite fertilizer, which comprises, by weight, 40-60 parts of urea, 10-30 parts of monoammonium phosphate or calcium carbonate, 10-35 parts of potassium chloride or potassium sulfate, 5-30 parts of a pelletizing additive, 3-5 parts of nano-scale chitosan modified attapulgite, 1-2 parts of a nano-scale chitosan film coating agent, and 10-40 parts of a water-retaining agent, wherein the slow-release composite fertilizer further comprises 1-10 parts by weight of water quenching slag. With the present invention, the slow-release composite fertilizer is provided, wherein the slow-release composite fertilizer has the following advantages that: the fertilizer effect release rate can be controlled according to the requirements on nutrients by crops at different growth stages, the nutrients can be provided for the crop growth timely and properly, the fertilizer utilizing rate is high, the film coating material is easy to degrade, the benefit is provided for the environmental protection, and the slow-release composite fertilizer of the present invention is suitable for the field crops.

Description

technical field [0001] The invention relates to a slow-release compound fertilizer. Background technique [0002] Chemical fertilizers are used in a large amount and widely used, and have become one of the most important means of production in agricultural production, occupying a large share of the cost of the agricultural industry. The water-solubility of chemical fertilizers makes them dissolve, decompose, volatilize and run off quickly after being applied to the soil, resulting in low nutrient utilization rate, incompatibility between the nutrient demand of crops and the nutrient supply of chemical fertilizers; it not only causes waste of resources, but also causes agricultural The increase in cost and the pollution of the lost chemical fertilizers to the water body, the atmosphere and the soil environment pose a threat to the environment on which human beings live. Therefore, the controlled release of chemical fertilizers is the goal pursued by people in the industry. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 王海炜
Owner 王海炜
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