水土保持学报2012，Vol.26Issue(4)：86-89,4.
稻麦两熟农田茬口衔接期养分径流流失特征
Characteristics of Surface Runoff Losses of Soil Nitrogen and Phosphorus During the Rice-Wheat-Rice Connection Periods in Intensive Rice-Wheat Rotation Field
摘要
Abstract
Field plot experiment was carried out to study the characteristics of surface runoff losses of soil nitrogen and phosphorus during the rice-wheat-rice connection periods in intensive rice-wheat rotation field under natural rainfall conditions. The results showed that the total volume of surface runoff water and the quantity of sediment by surface runoff reached 77.59 ma/hmz and 48.30 kg/hm2 under the conventional ferti- lization treatment（T0） during the wheat-rice connection period. And, no tillage treatment（T4） during the winter wheat growing season increased the volume of runoff water by 41. 41%, compared with TO; total nitrogen（TN）, total phosphorus（TP） concentrations in the runoff water reached 2.22, 0.46 rag/L, and, they reached 1.15, 1.65 g/kg in the sediment by surface runoff, respectively. Furthermore, under TO condi- tions, the total quantities of TN and TP losses by surface runoff reached 227.84, 115.57 g/hmz , respective- ly. Among which, more than 75% of TN loss was attributed to runoff water, and more than 59% of TP loss was attributed to the sediment by surface runoff during the wheat-rice connection period; compared with TO, rice straw application （T1）, wheat straw return and reducing fertilizer treatment （T2） during the winter wheat growing season decreased TN and TP losses by 6.04%~9.74% and 5.73%~11.54%, however, T4 increased them by 21.75% and 13. 42%during the wheat-rice connection period, respectively.关键词
氮/磷/径流/侵蚀泥沙/养分流失Key words
nitrogen/phosphorus/surface runoff sediment/nutrient loss分类
农业科技引用本文复制引用
郭智,周炜,陈留根,郑建初..稻麦两熟农田茬口衔接期养分径流流失特征[J].水土保持学报,2012,26(4):86-89,4.基金项目
江苏省农业科技自主创新项目[cx（11）2033] （）
