%0 Journal Article
%T GIS Study of Phosphorus Nutrient Input/Output in China at the County Level<br>基于GIS技术的中国农田磷素养分收支平衡研究
%A FANG Yu-dong
%A HU Ye-cui
%A FENG Zhi-ming
%A <br>方玉东
%A 胡业翠
%A 封志明
%J 资源科学
%D 2008
%I 
%X Using a nutrient balance farmland model and agricultural economic statistics, this paper analyzes the phosphorus balance of China's farmland at the national, provincial and county levels. Results show the following: 1) Total phosphorus nutrient input in China is 601×104t, and output is 328×104t, so the net surplus is 228×104t, or 0.029t/hm2 for farmland. The level of surplus P in farmland gradually declines from east to west; 2) 12.81% of counties, or 16.11% of China's cultivated area, have insufficient phosphorus, despite the huge surplus overall; 3) At the national level, chemical phosphate fertilizers and organic phosphate fertilizers account for 77.11% and 22.23% of total input amounts. Phosphorus from human and animal excreta accounts for 85.25% of total organic phosphate fertilizer inputs; 4) Biological phosphorus output from farmland amounts to 294×104t, accounting for 89.90% of total phosphorus output.
%K Farmland
%K Phosphorus nutrient
%K Nutrient input/output balance
%K County
%K China<br>农田
%K 磷素
%K 养分收支平衡
%K 县域
%K 中国
%K 农田
%K 磷素养分
%K 收支平衡
%K 研究
%K Input
%K Nutrient
%K Phosphorus
%K Study
%K Level
%K 总支出
%K 生物
%K 畜禽粪尿
%K 比例
%K 来源
%K 磷肥
%K 问题
%K 宏观配置
%K 资源
%K 肥料
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=4A09BC1D1EE8CF4320C11E45E58FA0B3&yid=67289AFF6305E306&vid=340AC2BF8E7AB4FD&iid=94C357A881DFC066&sid=00B9006659EBD8AC&eid=507521DBC725630F&journal_id=1007-7588&journal_name=资源科学&referenced_num=1&reference_num=16