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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (13): 220-225.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

中国农田土壤磷平衡现状及驱动因子分析

曹 宁,,张玉斌,陈新平   

  • 收稿日期:2009-03-11 修回日期:2009-04-13 出版日期:2009-07-05 发布日期:2009-07-05

SPATIAL-TEMPORAL CHANGE OF PHOSPHORUS BALANCE AND THE DRIVING FACTORS FOR AGROECOSYSTEMS IN CHINA

Cao Ning,, Zhangyubin, Chen Xinping   

  • Received:2009-03-11 Revised:2009-04-13 Online:2009-07-05 Published:2009-07-05

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713

摘要： 结合GIS平台对1996及2002年我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-20～425 kg/ha及 -17～450kg/ha。农田土壤磷盈余量在20～50 kg/ha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/ha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。

关键词: 拟南芥, 拟南芥, 低铁, 突变体, 筛选, 遗传基础

Abstract: 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/ha to 425 kg/ha and -17 kg/ha to 450 kg/ha in 1996 and 2002, respectively. The percentage of middle P surplus (20-50 kg/ha) decreased from 34.2% to 24.1%, while high P surplus (50-100 kg/ha) 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.