摘要
选取丹江口库区青塘河五龙池小流域坡耕地夏玉米黄棕壤为供试土壤,采用田间原位淋湿装置,通过阴阳离子树脂吸附法研究了3种耕作土壤硝态氮淋失的时空变化及其影响因素。结果表明,不同耕作方式土壤硝态氮累积淋失量存在明显差异,平作可以减少0~10 cm土层土壤硝态氮淋失量,而横坡和顺坡垄作均增加了10~20 cm和20~30 cm土层土壤硝态氮淋失量。研究结果可以量化土壤氮素循环机理,具有重要科学意义,并可为丹江口库区农业非点源污染防控提供依据。
In this study,the yellow brown soil of summer maize in slope farmland of Wulongchi small watershed of Qingtang River in Danjiangkou Reservoir Area was selected as the test soil,and the spatio-temporal variation of nitrate nitrogen leaching loss in three tillage soils and its influencing factors were studied by means of anion-cation resin adsorption method using in-situ field wetting device.The results showed that there were significant differences in the cumulative nitrate nitrogen leaching loss of different types of cultivated soils.Flat tillage could reduce the nitrate nitrogen leaching loss of 0-10 cm soil layer,while ridge tillage on both the transverse slope and the slope increased the nitrate nitrogen leaching loss of 10-20 cm and 20-30 cm soil layer.The research results can quantify the mechanism of soil nitrogen cycling,which are of great scientific significance and provide basis for the prevention and control of agricultural non-point source pollution in Danjiangkou Reservoir Area.
作者
任惠敏
李国慧
林成
宋娅妮
REN Hui-min;LI Guo-hui;LIN Cheng(Faculty of Resources and Environmental Science,Hubei University,Wuhan,Hubei 430062)
出处
《安徽农业科学》
CAS
2019年第24期67-68,87,共3页
Journal of Anhui Agricultural Sciences
基金
湖北省大学生创新训练项目(201710512081,201810512114)
国家自然科学基金项目(41471227)
关键词
耕作方式
硝态氮淋失
影响因素
五龙池小流域
Farming method
Nitrate nitrogen leaching
Influencing factor
Wulongchi small watershed
