%0 Journal Article
%T Effect of Longterm Fertilization Practices on Mobility of Phosphorus in a Huangnitu Paddy Soil Receiving Low P Input in the Taihu Lake Region,Jiangsu Province<br>低施磷水平下不同施肥对太湖地区黄泥土磷迁移性的影响
%A Pan Genxing
%A Jiao Shaojun
%A Li Lianqing
%A Xu Xiangdong
%A Qiu Duosheng
%A Xu Xiaobo
%A Chu Qiuhua
%A Zhao Hongxiang
%A <br>潘根兴
%A 焦少俊
%A 李恋卿
%A 徐向东
%A 邱多生
%A 徐晓波
%A 储秋华
%A 赵洪祥
%J 环境科学
%D 2003
%I 
%X Analysis of mobile forms of phosphorus of a Huangnitu, a typical paddy soil in the Taihu Lake region, Jiangsu was conducted. The soil has been put into a scheme of longterm fertilization treatments for 13 years. Total P content varied in arrange of 0.3-0.5 g.kg-1 under a range of total P fertilizer input of 0-53 kg/(hm2.a). As estimated from the total P pool values by mass balance principle, the soil had been subjected to water loss of P 2-8 kg/(hm2.a), with that under chemical fertilizers only being the biggest. The ratio of soluble P to the total was in a range of 0.2%-0.4%, without significant influence by the different fertilization schemes. While chemical fertilizer plus pig slurry manure applications had remarkably enhanced the resin-P pool by 20-40 mg.kg-1, P mobilization was not observed due to combined application of chemical fertilizers and straw amendments despite of the increase of the SOM. Therefore, P water loss in paddy soils might have active under continuous chemical fertilization alone in agriculture of this region and could not be accounted for by dissolution in water and subsequent runoff migration. For reducing the present prominent non point source pollution of N and P in the region, it is suggested that chemical fertilizers are applied in combination with an appropriate amount of manure or straw return for reducing soil P loss and, in turn, the non-point source pollution loading.
%K paddy soil
%K mobile phosphorus
%K longterm field trial
%K fertilization<br>水稻土
%K 磷迁移性
%K 磷流失
%K 农业非点源污染
%K 长期施肥试验
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=A5A7CBC11862F7E4&yid=D43C4A19B2EE3C0A&vid=B91E8C6D6FE990DB&iid=38B194292C032A66&sid=C753EB8AC8F551B9&eid=C36EC077A8A90308&journal_id=0250-3301&journal_name=环境科学&referenced_num=31&reference_num=20