Method for retarding agricultural non-point source pollution by applying biological carbon and nitrification inhibitor

A technology of agricultural non-point source pollution and nitrification inhibitors, applied in the field of agricultural non-point source pollution research, can solve the problems of restricting the sustainable development of agriculture, excessive nitrogen fertilizer input, degradation, etc.

Inactive Publication Date: 2016-06-01
NANJING AGRICULTURAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country's intensive agriculture includes grain crops and horticultural economic crops, etc., with high multiple cropping index and excessive nitrogen fert...

Method used

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  • Method for retarding agricultural non-point source pollution by applying biological carbon and nitrification inhibitor
  • Method for retarding agricultural non-point source pollution by applying biological carbon and nitrification inhibitor
  • Method for retarding agricultural non-point source pollution by applying biological carbon and nitrification inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1. Effect of Biochar Application on Nitrous Oxide Emissions and Crop Yield in Rice-wheat Rotation System

[0026] Taking the rice-wheat rotation system in my country as the object, the effect of wheat straw biochar application on N 2 The impact of O emission law; combined with the total output of wheat and rice to evaluate the comprehensive impact on the ecosystem, and provide a scientific basis for the application of biochar to mitigate agricultural non-point source pollution. No nitrogen fertilizer (N0) or 250kg / hm 2 Under the condition of / crop nitrogen fertilizer (N1), field in situ observation wheat season application 0 (B0), 20 (B1), 40t / hm 2 (B2) Biochar to rice-wheat rotation systemN 2 O annual emission and grain yield, set no nitrogen fertilizer, no biochar (N0B0), no nitrogen fertilizer, 20t / hm 2 Biochar (N0B1), nitrogen fertilizer without biochar (N1B0), nitrogen fertilizer and 20t / hm 2 Combined application of biochar (N1B1), nitrogen fertilizer a...

Embodiment 2

[0030] Embodiment two, biochar on soil physical and chemical properties, N 2 Effects on O emissions and vegetable yield

[0031] There are 9 treatments in the field test, the nitrogen fertilizer application level is no nitrogen fertilizer (N0), and the conventional fertilizer application rate is 1200kg / hm for 4 crops per year 2 / yr (N1) and 4 / 3 conventional nitrogen fertilizer application rate (N2), the level of biochar application is no application of biochar (C0), application of 20t / hm 2 Biochar (C1) and application of 40t / hm 2 Biochar (C2). Three replicates were set up for each treatment, and the vegetable planting system, tillage and irrigation level, fertilization method and time were all carried out according to the local management measures. During the test period, nine crops of vegetables were continuously planted, namely amaranth (Amaranthusmangostanus L.), water spinach (Ipomoea aquatica Forssk.), vegetable seedling (Brassica chinensis L.), coriander (Coriandrum s...

Embodiment 3

[0044] Embodiment 3, new-type nitrification inhibitors lower vegetable field N in different nitrogen application rates 2 Study on the Influence of O and NO Emissions

[0045] In the field experiment of continuously planting nine-season vegetables in the vegetable field ecosystem in my country, the effect of the new nitrification inhibitor CP nitrogen fertilizer on N 2 The impact of O and NO emissions. The results showed that at nitrogen fertilization levels of 0–480 kgNha -1 crop -1 Lower (0, 80, 160, 240, 320, 480kgNha -1 crop -1 ), the CP nitrogen fertilizer treatment effectively inhibited soil nitrification; compared with conventional urea, the CP nitrogen fertilizer treatment reduced the soil nitrate nitrogen concentration by 18.2%, and the ammonium nitrogen concentration increased by 14.1% ( figure 2 ). Regardless of whether nitrification inhibitors are added to nitrogen fertilizers, N 2 The total amount of O emissions and the amount of nitrogen fertilizer both sh...

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Abstract

The invention relates to a method for retarding agricultural non-point source pollution by comprehensively applying biological carbon and a nitrification inhibitor, belongs to the field of agricultural non-point source pollution research, and is dedicated to retarding non-point source pollution caused by nitrogen gas losses and subsequent atmospheric deposition in a paddy field and vegetable field ecosystem. According to the method, the biological carbon and the nitrification inhibitor are applied in fields of a rice-wheat crop rotation rice field and intensive vegetable cultivation ecosystem, therefore emission of gaseous nitrogen, such as N2O and NOx, is effectively reduced, and the atmospheric deposition is reduced to retard the non-point source pollution; the utilization rate and the yield of crops are increased, and nitrate nitrogen content of soil and migration of nitrate nitrogen to a water body are reduced to retard the non-point source pollution. The method is a brand-new, rapid, simple and efficient non-point source pollution retarding method, can be used for a wide variety of agricultural ecosystems, is convenient to operate and easily available in material, can be widely applied to prevention and control research on the agricultural non-point source pollution to paddy fields and vegetable fields, and provides an effective means for deeply researching the agricultural non-point source pollution.

Description

technical field [0001] The invention belongs to the research field of agricultural non-point source pollution, and relates to a method for slowing down agricultural non-point source pollution by applying biochar and nitrification inhibitors. Background technique [0002] my country's intensive agriculture includes grain crops and horticultural economic crops, etc., with high multiple cropping index and excessive nitrogen fertilizer input, which brings serious non-point source pollution and soil quality degradation and other major problems, restricting the sustainable development of agriculture. A large amount of reactive nitrogen is discharged into the atmosphere, causing the atmospheric deposition to increase continuously. Atmospheric deposition is a global problem and an increasing threat to ecosystem functions. The Yangtze River Delta is one of the regions with developed industry and agriculture in China. The discharge of reactive nitrogen is very large, resulting in a l...

Claims

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Application Information

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IPC IPC(8): A01B79/00C09K17/40C09K17/02C09K17/14C09K101/00C09K109/00
CPCA01B79/00C09K17/02C09K17/14C09K17/40C09K2101/00C09K2109/00
Inventor 熊正琴董玉兵李博吴震
Owner NANJING AGRICULTURAL UNIVERSITY
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