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Environment friendly composite material for controlling loss of nitrogen fertilizer and applications

An environmentally friendly, composite material technology, applied in applications, fertilizer mixtures, fertilization devices, etc., can solve problems such as inability to meet aquaculture, and achieve the effects of reducing water loss, preventing chitosan loss, and good thixotropy

Inactive Publication Date: 2007-02-21
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, my country has about 200,000 km 2 of the offshore waters are affected by pollution, about 40,000 km 2 The water quality of the sea area can no longer meet the requirements of aquaculture, beach, sea sports entertainment and coastal tourism

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Active soil attapulgite (including a certain amount of fly ash) and polymer materials chitosan and polyacrylamide are mixed in a ratio of 200:1:4 to make a fertilizer additive, and the additive is mixed with urea or ammonium sulfate in 1 : 5, ground into a 200-mesh powder and mixed evenly.

Embodiment 2

[0060] Before urea or ammonium sulfate is produced and granulated, they are mixed evenly and granulated, with a particle size of 2-3 mm. The particle size can be adjusted according to the viscosity of the soil. The sandy soil has a large soil gap, the particle size is 3mm larger, and the loam particle size is 2mm.

Embodiment 3

[0062] As base fertilizer: evenly spread farmyard manure, the additive and fertilizer (refer to the technical plan for the mixing ratio, 10-15 kg / mu) in the pre-cultivated field, and then cultivate the land in a conventional way.

[0063] As topdressing fertilizer: refer to the technical plan to apply additives and fertilizers according to the application method of ordinary chemical fertilizers; after fertilization, combined with plowing and intertillage, the effect can be better.

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PUM

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Abstract

This invention discloses a method for preparing environmentally friendly composite for controlling nitrogen fertilizer loss. The method comprises: (1) mixing attapulgite, chitosan, polyacrylamide, etc.; (2) irradiating at 500-1300 Gy to form the composite. The composite can be mixed with nitrogen fertilizer and granulated to form controlled-release nitrogen fertilizer granules (with diameters of 1.5-3 mm). The composite can cooperatively adsorb and fix nitrogen and decrease fertilizer requirement, thus can prevent nitrogen entry into water and air and efficiently control water eutrophication and greenhouse gas N2O emission. The composite has such advantages as low cost and high efficiency in fixing nitrogen.

Description

technical field [0001] The method relates to a modified environment-friendly composite material and its application, which can reduce greenhouse gas emissions from chemical fertilizers and non-point source pollution from eutrophication of water bodies. Background technique [0002] In 2002, the United Nations Environment Program published the "Global Environment Outlook" report, which listed the deterioration of air and water pollution as the first of the eight major environmental problems. The most important cause of air pollution is greenhouse gas emissions, and water pollution is mainly caused by the entry of nitrogen and phosphorus into water bodies, resulting in eutrophication of water bodies. A study shows that due to the extensive use and improper use of chemical fertilizers, 1.235 million tons of nitrogen flows into rivers and lakes through surface waters, 494,000 tons enters groundwater, and 2.99 million tons enters the atmosphere in my country every year. Nitrogen...

Claims

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Application Information

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IPC IPC(8): C05G3/08C05G3/90
Inventor 姜疆蔡冬清余增亮吴跃进卞坡李军
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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