Changes in Environment Influence and Use Efficiency of Fertilizer Nitrogen in the Yangtze River Basin

Abstract:

Base on estimate the amount of nitrogen (N) added to the agroecosystem by human activities, and analyze changes in the environment influence of excess N and fertilizer nitrogen use efficiency (FNE) in agricultural fields of the Yangtze River Basin between 1990 and 2000. Excess N is stored in farmland and transferred to water bodies. The excess N stored in farmland was 2.75 Tg N in 1990 and 3.88 Tg N in 2000. The total N transferred to water bodies was 3.45 Tg N in 1990 and 5.07 Tg N in 2000. The FNE decreased by 22.17 % from 1990 to 2000. Changes in the geographic distribution of variational trends of the N budget, N transferred to water bodies, and FNE are more pronounced in the middle and lower reaches of the Yangtze River Basin. We propose effective measures for maximizing the efficiency of N use and reducing the impact of agricultural N on environment in the Yangtze River Basin.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 1070-1077
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.1070
• Online since: December 2012
• Authors: Guang Wen Ma, Xiang Bao, Ye Yao Wang
• Keywords: Agriculture, Efficiency, Nitrogen, River Basin, Water Pollution, Water Quality

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