【作者】 李新虎； 张展羽； 杨洁； 王超；

【Author】 Li Xin-Hu~1 Zhang Zhan-Yu~1 Yang Jie~2 Wang Chao~1 Wang Bin~1 (1.College of Agricultural Engineering,Hohai University,Nanjing 210098,China;2.Soil and Water Conservation Research Institute of Jiangxi Province Nanchang 330000,China)~1

【机构】 河海大学现代农业工程学院； 江西水土保持科学研究所；

【摘要】 利用大型土壤渗漏装置(Lysimeter)对百喜草覆盖、百喜草敷盖、裸露对照三种生态措施的地下径流养分流失问题进行了研究。结果表明:在试验期间这三种处理措施硝氮流失总量分别为992.64 mg,2679.67 mg,258.84 mg;总氮流失总量为1096.494 mg,3108.376 mg,295.0648 mg;总磷流失量为603.35 mg,3109.45 mg,182.42 mg;养分随地下径流流失量敷盖最大、裸露对照最小,这和一般情况下地表径流养分流失有所不同;从流失过程可以看出这三个处理的地下径流养分流失和径流过程比较相似,符合"肥随水走"的水肥运动规律,当降雨过后地下径流变大,养分流失也增大;在整个过程中,硝氮随径流过程变化剧烈,而且随地下径流流失量大,总磷则相对平稳,而且流失量也小;更多还原

【Abstract】 The nutrient loss in subsurface runoffs are studied on red soil slope under different measures by using Drainage Lysimete,the results show that ammonia nitrogen loss under three measures are 992.64 mg,2679.67 mg,258.84 mg;total nitrogen are 1096.494 mg,3108.376 mg,295.0648 mg,total phosphorus loss are 603.35 mg,3109.45 mg,182.42 mg;the nutrient loss in subsurface runoffs is highest under mulch,and is least under bareness,it is differ from surface runoffs.It can be seen that the process of nutrient loss parallel the runoffs process,and accord the law of nutrient movement follow water,the subsurface runoffs is increasing after the rain, and then the nutrient loss of increase is.The rangeability of ammonia nitrogen loss is largest,and the rangeability of total phosphorus is relatively stable in whole process.更多还原