Abstract:To simply, intuitively, and fully assess the nitrogen (N) footprint of agriculture in Guangdong Province, China, A modified N-calculator model was applied and an analysis of agricultural N flow processes was combined to calculate the use and emissions of N in agriculture. The main contributors to the N footprint were fertilizer and feed, together accounting for 81% of the N footprint in 2010. The size of the N footprint increased by 45% from 1990 to 2010, and by 88% during the same period if measured on an average land basis. The fastest growing contributor to the N footprint was atmospheric N deposition, which increased at an annual rate of 8.5%. Agricultural energy was another large contributor to the N footprint with a 107% increase from 1990 to 2010. Pollution accounted for more than 31% of the total N footprint, mainly because of the loss of soil N. Finally, the N footprint of other agriculture-related industries accounted for approximately 17% of the total agricultural N footprint (207209.79t).
周涛, 王云鹏, 王芳, 冯艳芬. 广东省农业氮足迹分析[J]. 中国环境科学, 2014, 34(9): 2430-2438.
ZHOU Tao, WANG Yun-Peng, WANG Fang, FENG Yan-Fen. Analysis of the nitrogen footprint of agriculture in Guangdong. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(9): 2430-2438.