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Position: Home > Articles > Spatial-Temporal Change of Phosphorus Balance and the Driving Factors for Agroecosystems in China Chinese Agricultural Science Bulletin 2009,25 (13) 220-225

中国农田土壤磷平衡现状及驱动因子分析

作  者:
曹宁;张玉斌;陈新平
单  位:
中国农业大学资源与环境学院;吉林大学植物科学学院
关键词:
农田系统;磷平衡;驱动因子
摘  要:
结合GIS平台对1996及2002年中国县域农田土壤磷平衡状况分析结果表明,全国农田土壤磷平衡存在很大的时空变异。1996年及2002年县域农田土壤磷盈亏范围分别为-20~425kg/hm2及-17~450kg/hm2。农田土壤磷盈余量在20~50kg/hm2的县市占全国总县市的比例从1996年的34.2%下降到2002年的24.1%,而磷盈余量在50~100kg/hm2的县市所占比例从29.3%增加到33.4%,农田土壤磷盈余量在6年间普遍提高了一个等级。区域尺度上,化肥磷投入是影响磷平衡空间分异的直接因素,而有机肥的影响不明显;种植业结构变化是影响磷平衡时空变化的间接因素;农业收入是经济欠发达地区影响磷肥投入的主要原因之一。
译  名:
Spatial-Temporal Change of Phosphorus Balance and the Driving Factors for Agroecosystems in China
作  者:
Cao Ning 1,2,Zhangyubin 1,Chen Xinping 2(1 College of Plant Science of Jilin University,Changchun 130062;2 College of Resources and Environment,China Agricultural University,Beijing 100094)
关键词:
agroecosystems,P balance,driving factors
摘  要:
Using a statistic data which based on a GIS plat,P budget for national(1952-2004) and regional(1980-2002) level in China were calculated,and it's spatial and temporal variabilities were analyzed to estimate the potential impacts of P surpluses or deficits to soil.At regional level,the P budgets ranged from-20 kg/hm2 to 425 kg/hm2 and-17 kg/hm2 to 450 kg/hm2 in 1996 and 2002,respectively.The percentage of middle P surplus(20-50 kg/hm2) decreased from 34.2% to 24.1%,while high P surplus(50-100 kg/hm2) increased from 29.3% to 33.4% between 1996 and 2002.P fertilizer application was the dominate factor affected the variability of P budget whether on the national or regional scale;plant structure was also a driving factor affecting the temporal variability of P input.The economic strength(agricultural income) of the farmer played an important role in the P application in the relatively undeveloped agricultural area.

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