农业环境科学学报2011，Vol.30Issue(8)：1645-1651,7.
农田水位管理系统地下排水磷淋失实验研究
The Effects of Water Table Management on Phosphorus Leaching Loss in the Farmland Drainage
摘要
Abstract
It is significant that the nutrients loss could be reduced and the water environment could be protected via controlled drainage. The effects of water table management system on the outflow volumes of sub-surface drainage and phosphorous leaching loss were statistically analyzed during the growing season of corn. The results showed that the total outflow volumes were reduced about 1/3 from water table management system compared to free drainage system. However, the concentration of phosphorus( P)of drainage and the total phosphorus leaching loss were significant higher under water table management system than free drainage system. At the meantime, the oxidation-reduction potential (Eh) was lower and pH value and concentration of dissolved Mn and Fe were higher in water table management system compared to free drainage system. These results indicated that the increased P leaching loss in drainage under water table management system were most likely caused by an increase in P solubility due to continuously anaerobic condition which aroused the changes of values of Eh, pH and concentration of Mn and Fe.关键词
农田水位管理系统/暗管自由排水系统/地下排水/磷淋失/氧化还原电位Key words
water table management(CI/SI)/ free drainage(FD)/ sub-surface drainage/ phosphorus leaching loss/ oxidation-reduction po-tential( Eh )分类
资源环境引用本文复制引用
胡亚琼,许迪,Valero C S,A Madramootoo C,王少丽..农田水位管理系统地下排水磷淋失实验研究[J].农业环境科学学报,2011,30(8):1645-1651,7.基金项目
国家自然科学基金重点项目(50639040,50739003) （50639040,50739003）
中国水利水电科学研究院科研专项(节集0809) （节集0809）
