农业环境科学学报2013，Vol.32Issue(4)：838-846,9.DOI:10.11654/jaes.2013.04.026
洱海北部地区不同氮、磷处理对稻田田面水氮磷动态变化的影响
Dynamic Changes of Nitrogen and Phosphorus Concentrations in Surface Waters of Paddy Soils in the Northern Area of Erhai Lake
摘要
Abstract
A field experiment was conducted to study dynamic changes in ammonium(NH4+-N),nitrate(NO3--N) concentrations,dissolved total N(DTN),total N (TN),total P(TP) and dissolved total P(DTP) concentrations in the surface waters of paddy fields applied with different treatments of N and P fertilizers in the northern region of Erhai Lake.Results showed that TN and DTN peaked after 1 ～3 days,and decreased rapidly and then leveled off after 9 days of the basal fertilizer applied,while TN and DTN reached their respective peak values in concentrations quickly during milk stage.Dynamic changes of DTN fitted a quadratic equation(Y=AX2+BX+C).NH4+-N peaked 3～5 days after the basal fertilizer applied,but NH4+-N peaked 1 ～2 days after the milk fertilizer applied.TP and DTP concentrations were exponentially declined after basal fertilizer application.However,there were no differences in these indexes 12 days later,this change could be described with an exponential equation (Y=C0×ekt,k＜0).Therefore,9 days after fertilizing were the key period for controlling the N loss from the paddy fields,but two weeks for controlling the P loss.Fertilizing season should avoid rainfall period to reduce nutrient losses through runoff.关键词
水稻土/田面水/氮,磷/动态变化Key words
paddy/ surface water/ nitrogen/ phosphorus/ dynamic change分类
资源环境引用本文复制引用
施泽升,续勇波,雷宝坤,刘宏斌..洱海北部地区不同氮、磷处理对稻田田面水氮磷动态变化的影响[J].农业环境科学学报,2013,32(4):838-846,9.基金项目
公益性行业(农业)科研专项(201003014-6) （农业）
土壤与农业可持续发展国家重点实验室开放基金(0812000051) （0812000051）
国家自然科学基金(31101605,31260503) （31101605,31260503）
云南省自然科学基金(2010ZC083) （2010ZC083）
