草业学报2016，Vol.25Issue(4)：63-72,10.DOI:10.11686/cyxb2015509
长期定位施肥条件下紫色土无机磷形态演变研究
Inorganic phosphorus in a regosol (purple)soil under long-term phosphorus fertilization
摘要
Abstract
The Jiang Bofan-Gu Yichu Inorganic Phosphorus Grading System was used to grade measurements of different inorganic phosphorus forms in the 0-100 cm soil layer under a long term (22 years)fertilizer appli-cation trial.Total phosphorus,available phosphorus and inorganic phosphorus all increased in soils receiving long-term application of chemical phosphate fertilizer and treatments combining organic and chemical fertilizer [pig manure+NPK (M+NPK)].Available phosphorus increased by a factor of six while available phosphorus, total phosphorus,and various forms of inorganic phosphorus reduced in soil without fertilizer.In addition the Fe-P and Ca10-P content in the lower soil layers were higher than those in the upper layers;the same trend was apparent in all inorganic phosphorus forms.The distribution profiles for inorganic phosphorus including Ca2-P, Al-P,Ca8-P,and O-P were similar,all reduced rapidly between 20 -60 cm soil depth but few changes were observed at 80-100 cm depth.The relative contribution of various forms of inorganic phosphorus to soil phos-phorus was Ca2-P (0.9569 )> Al-P (0.9265 )> Ca8-P (0.9100 )> Fe-P (0.8277 )> Ca10-P (0.7449 )> O-P (0.7362).Long-term application of organic and inorganic fertilizers to regosol soil could significantly increase the accumulation of phosphorus,suppress phosphorus fixation,enhance phosphorus mobility and improve phosphorus use efficiency.关键词
紫色土/长期定位试验/无机磷形态Key words
purple soil/long-term located experiment/morphologies of inorganic phosphorus引用本文复制引用
韩晓飞,高明,谢德体,王子芳,陈晨..长期定位施肥条件下紫色土无机磷形态演变研究[J].草业学报,2016,25(4):63-72,10.基金项目
国家国际科技合作专项项目（2013DFG92520），国家“十二五”科技支撑计划项目（2012BAD15B04003）和西南大学中央高校基本科研业务费专项项目（XDJK2013D005）资助。 （）
