生态环境学报2009，Vol.18Issue(5)：1949-1955,7.
北京市房山区农田表观磷平衡分析
Analysis of surface phosphorus balance of farmland in Fangshan district, Beijing
摘要
Abstract
A framework and database of phosphorus production in 2001, 2003, 2005, and 2007 in the District of Fangshan, Beijing was developed in this study. It was established based on the OECD surface soil phosphorus balance model. The regional phosphorus balance intensity was analyzed with applying GIS. The results indicated that fertilizer was the most important source of phosphorus input in farmland, and the average phosphorus fertilizer input kept increasing. It has been increased from 111.34 kg·hm~(-2) in 2001 to 407.42 kg·hm~(-2).in 2007, and some areas have exceeded average level of North China and National standard. The total farmland phosphorus and surface soil phosphorus balance were decreased at the beginning and then increased, while phosphorus output declined from 2001 to 2007. The average phosphorus input and balance intensity have been increased significantly every year. The surface balance of phosphorus in the region has various spatial differences. The phosphorus surplus trend in the south of farm-land was higher than in the north; the balance intensity in the central and southern part kept increasing, especially southeast and southwest. The changes of phosphorus balance driving force were the direct reason of spatial differences, as a whole, planting driven surplus > double driven surplus > breeding driven surplus. The accumulation of soil nutrient in farmland would contribute to the increase of potential loads of non-point source pollution. This paper provided scientific basis for phosphorus optimal management of farmland、 water quality improvement and environmental decision making.关键词
土壤表观磷素平衡/磷积累/磷平衡强度/农田Key words
farmland/ surface soil phosphorus balance/ phosphorus accumulation/ phosphorus balance intensity分类
农业科技引用本文复制引用
张慧,高如泰,夏训峰,贾小红,刘树庆,许其功,姜甜甜..北京市房山区农田表观磷平衡分析[J].生态环境学报,2009,18(5):1949-1955,7.基金项目
国家水体污染控制与治理科技重大专项(2008ZX07209-007,2009ZX07632-02,2009ZX07106-001) （2008ZX07209-007,2009ZX07632-02,2009ZX07106-001）
