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Method for reducing emission of N2O of dry farmland soil

A soil and farmland technology, applied in the field of greenhouse gas emission reduction in farmland ecosystems, can solve the problems of low fertilizer utilization rate, achieve the effect of improving nitrogen utilization rate and increasing crop yield

Inactive Publication Date: 2010-12-15
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to excessive fertilization and low fertilizer use efficiency, nitrogen fertilization in farmland produces N through nitrification and denitrification. 2 O, thus becoming N 2 An important emission source of O, so it is urgent to find effective farmland soil N 2 O emission reduction technology

Method used

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  • Method for reducing emission of N2O of dry farmland soil
  • Method for reducing emission of N2O of dry farmland soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The experiment was carried out in Shilihe Town, Sujiatun District, Shenyang City, Liaoning Province. The soil was brown loam and the crop was corn. Add nitrification inhibitor dicyandiamide (accounting for 10‰ of the weight of nitrogen in urea) to urea fertilizer, and mix it in urea before fertilization. The amount of fertilizer applied is 120KgN / ha of base fertilizer (kg nitrogen / ha), and 30KgN / ha of top dressing. The size of the static box is 600×300×200mm. Adding nitrification inhibitor treatment and applying common nitrogen fertilizer treatment respectively set up 4 randomly distributed field test plots, each plot 30m 2 , place a static box to monitor farmland soil N 2 O emissions. The collection time of the gas samples in the box is within 1 hour after the static box is closed, at intervals of 15-20 minutes. N in gas samples 2 O concentration was determined by a gas chromatograph with an electron capture detector (ECD). The gas flux (emission rate) is calcula...

Embodiment 2

[0027] The experiment was carried out in Shilihe Town, Sujiatun District, Shenyang City, Liaoning Province. The soil was brown loam and the crop was corn. Nitrification inhibitors dicyandiamide (accounting for 7‰ of the weight of nitrogen in urea) and 1,2,4-triazole (accounting for 3‰ of nitrogen in urea) are added to the urea fertilizer. Mix in urea before fertilizing. The amount of fertilizer applied is 120KgN / ha of base fertilizer and 30KgN / ha of top dressing. The size of the static box is 600×300×200mm. Adding nitrification inhibitor treatment and applying common nitrogen fertilizer treatment respectively set up 4 randomly distributed field test plots, each plot 30m 2 , place a static box to monitor farmland soil N 2 O emissions. The collection time of the gas samples in the box is within 1 hour after the static box is closed, at intervals of 20 minutes. N in gas samples 2 O concentration was determined by a gas chromatograph with an electron capture detector (ECD). ...

Embodiment 3

[0030]The experiment was carried out in Shilihe Town, Sujiatun District, Shenyang City, Liaoning Province. The soil was brown loam and the crops were soybeans. Add nitrification inhibitor dicyandiamide (accounting for 10‰ of nitrogen element weight in urea) to urea fertilizer. Mix in urea before fertilizing. The amount of fertilizer applied is 60KgN / ha of base fertilizer. The size of the static box is 600×300×200mm. Adding nitrification inhibitor treatment and applying common nitrogen fertilizer treatment respectively set up 4 randomly distributed field test plots, each plot 30m 2 , place a static box to monitor farmland soil N 2 O emissions. The collection time of the gas samples in the box is within 1 hour after the static box is closed, at intervals of 20 minutes. N in gas samples 2 O concentration was determined by a gas chromatograph with an electron capture detector (ECD). The gas flux (emission rate) is calculated from the gas concentration increase rate at diffe...

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Abstract

The invention belongs to the technical field of greenhouse gas emission reduction of farmland ecosystems, and in particular relates to a method for reducing emission of N2O of dry farmland soil, which comprises the step of: adding a nitrification inhibitor of dicyandiamide and / or 1,2,4-triazole in a nitrogen manure, wherein the dicyandiamide is 2-12 thousandths of the weight of nitrogen in the manure and the 1,2,4-triazole is 1-8 thousandths of the weight of nitrogen in the manure. By adding the nitrification inhibitor of the dicyandiamide and / or the 1,2,4-triazole, and the like in the nitrogen manure of urea, and the like, the invention achieves the purposes of inhibiting the conversion of the nitrogen by the soil nitrification and greatly reducing the emission of the N2O of the dry farmland soil in China, can ensure that the emission of the N2O of the brunisolic soil in the northeast of China, which is suitable for planting crops of corn, bean, wheat, and the like, is reduced by 34-86 percent through field observation at the crop growth period, and has no remarkable influence on the yield of the crops.

Description

technical field [0001] The invention belongs to the technical field of greenhouse gas emission reduction in farmland ecosystems, and in particular relates to a dryland farmland soil N 2 O emission reduction methods. Background technique [0002] The main cause of global warming is the increase in the concentration of greenhouse gases in the atmosphere. N 2 O is the third important greenhouse gas, and its single-molecule warming potential is CO 2 The contribution to global warming accounts for about 7% of the total contribution of all greenhouse gases, and its importance is second only to CO 2 and CH 4 . It also participates in the destruction of stratospheric ozone and enhances ultraviolet radiation to the surface. Atmospheric N 2 The concentration of O is about 310ppbv with an annual growth rate of 0.25%, which means that the current N 2 The increase of O concentration will have a long-term impact on global climate change. [0003] Global warming is an indisputable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08A01C21/00C05G3/90
CPCY02P60/21
Inventor 徐慧倪志龙董丹夏忠伟杨伟超郭彦玲章燕陈冠雄
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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