土壤2013，Vol.45Issue(2)：207-213,7.
苕溪流域不同施肥条件下稻田田面水氮磷动态特征及产量研究
Study on Rice Yield and Dynamics of Nitrogen and Phosphorus in Surface Water of Paddy Field Under Different Fertilizations in Tiaoxi River Basin
摘要
Abstract
Under 8 treatments with different fertilization and management practices,this study investigated the status and risk of non-point pollution in Tiaoxi River basin through the dynamic of N and P in surface water of paddy field.The results showed that all of fertilizer reduction treatments could ensure the rice yield and reduce the concentration and loss potential of N and P in surface water of paddy field.The highest concentrations of TN and NH4+-N occurred at the 1st and 3rd day after fertilization,and descended to a low level in 7 days after fertilization.NH4+-N was the main monitoring indicator of N loss in paddy field.The highest concentrations of TP and DIP occurred at the lst day after fertilizations,and decreased with time.The concentration of TP descended to less than 1 mg/L in 5 days after fertilization.DIP/TP was basically less than 0.5,suggesting the suspended particulate phosphorus was the main way of P loss.In addition,the later fertilization could increase the relative loss potential of DIP by raising the value of DIP/TP.关键词
减量施肥/氮/磷/动态Key words
Fertilizer reduction/ Nitrogen/ Phosphorus/ Dynamic分类
农业科技引用本文复制引用
吴俊,樊剑波,何园球,屠人凤,谭炳昌,徐欢,许小伟..苕溪流域不同施肥条件下稻田田面水氮磷动态特征及产量研究[J].土壤,2013,45(2):207-213,7.基金项目
国家科技支撑计划课题项目(2011BAD31B04)和国家自然科学基金面上项目(30971869)资助. （2011BAD31B04）
