Nutrient controlled release technology

A process and nutrient technology, applied in the direction of layered/coated fertilizers, fertilizer mixtures, fertilization devices, etc., can solve the problems of crops not being able to obtain yield, nutrient imbalance, and agricultural products are not easy to sell, so as to promote the conversion of light energy into electrical energy and active chemical energy, promote assimilation and nitrogen metabolism, and improve photosynthetic efficiency

Inactive Publication Date: 2017-12-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Excessive application of fertilizers and excessive release of fertilizer effects have the following hazards: (1) lead to deterioration of soil properties: large-scale application of single-element chemical fertilizers in farmland, its nutrients cannot be effectively absorbed and utilized by crops, nitrogen, phosphorus, potassium, etc. Chemical substances are easily consolidated by the soil, forming various chemical salts and accumulating in the soil, resulting in an imbalance of soil nutrient structure and deterioration of physical properties. Some plots of harmful metals and harmful bacteria exceed the standard, which will lead to deterioration of soil properties; (2) Plants will wilting, root burn and necrosis; (3) leading to a decline in product quality: for example, partial application of certain chemical fertilizers will lead to nutritional imbalances in crops, and the transformation and synthesis of some substances in the body will be blocked, resulting in a decrease in product quality. Vegetables do not taste good and are easy to rot and cannot be stored. The reason is that excessive chemical fertilizers are used; (4) Environmental pollution: Due to the excessive application of chemical fertilizers, water-soluble nutrients and other substances in the soil are leached by rainwater and farmland irrigation. In the groundwater and rivers, the groundwater and rivers in some areas are polluted, and the groundwater, rivers, and lakes are eutrophic, which makes the groundwater unhealthy, and fish and shrimps in some rivers and lakes often die; (5) lead to production High yield ratio: First, crops cannot obtain high yields due to factors such as cultivation levels and crop fertilizer requirements; second, due to excessive application of several types of fertilizers, nutritional imbalances and nutrient imbalances are caused. It only increases the cost without increasing the output, and causes low-quality agricultural products to be difficult to sell or the price is low, which brings losses to farmers

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] The present embodiment provides a nutrient controlled release process, comprising coating fertilizer particles with a layer of starch-containing polypropylene film with a pore size of 600nm and a porosity of 30% and a layer of composite film in sequence. The thickness ratio of the membrane and the composite membrane is 1:3, and the raw materials of the composite membrane include nano-silicon dioxide and nano-titanium dioxide with a particle size of 20nm, and the mass ratio of nano-silicon dioxide and nano-titanium dioxide is 42:58.

Embodiment 2

[0024] The present embodiment provides a nutrient controlled release process, comprising coating fertilizer particles with a layer of starch-containing polypropylene film with a pore size of 800nm ​​and a porosity of 40% and a layer of composite film in sequence, polypropylene The thickness ratio of the membrane and the composite membrane is 2:2, and the raw materials of the composite membrane include nano-silicon dioxide and nano-titanium dioxide with a particle size of 40nm, and the mass ratio of nano-silicon dioxide and nano-titanium dioxide is 55:45.

Embodiment 3

[0026] The present embodiment provides a nutrient controlled release process, comprising coating fertilizer particles with a layer of starch-containing polypropylene film with a pore size of 700nm and a porosity of 40% and a layer of composite film in sequence, polypropylene The thickness ratio of the membrane and the composite membrane is 2:3, and the raw materials of the composite membrane include nano-silicon dioxide and nano-titanium dioxide with a particle size of 30nm, and the mass ratio of nano-silicon dioxide and nano-titanium dioxide is 52:48.

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Abstract

The invention belongs to the technical field of agricultural production materials and provides a nutrient controlled release technology. The nutrient controlled release technology comprises the step of sequentially cladding fertilizer grains with one layer of polypropylene film and one layer of composite film; the composite film is prepared from the raw materials including nano silicon dioxide and nano titanium dioxide, wherein the mass ratio of the nano silicon dioxide to the nano titanium dioxide is (42 to 55) to (45 to 58). The method provided by the invention adopts a scientific and reasonable design and fertilizer nutrients can be slowly released in soil; a nutrient controlled release period can be prolonged and the utilization rate of fertilizer is improved.

Description

technical field [0001] The invention belongs to the technical field of agricultural production materials, and in particular relates to a nutrient controlled release process. Background technique [0002] Fertilizer refers to a class of substances that provide one or more essential nutrient elements for plants, improve soil properties, and increase soil fertility levels. It is one of the material bases of agricultural production. [0003] Fertilizers are essential for the growth of crops, but excessive application of fertilizers can also affect the growth of plants. For example, when there is too much nitrogen fertilizer, the leaves are large and dark green, soft and loose, and the plants are leggy. In addition, when there is too much nitrogen, the sugar content in the body is relatively insufficient, the mechanical tissues in the stem are underdeveloped, and it is easy to lodging and be harmed by diseases and insect pests; When there is too much, small focal spots appear on...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05G5/30
Inventor李绍才孙海龙缪宁
OwnerSICHUAN UNIV