农业资源与环境学报Issue(3)：222-228,7.DOI:10.13254/j.jare.2014.0325
填闲作物消减蔬菜生产棚室土壤硝态氮潜力研究
The Potential Research of Catch Crop in Decrease Soil Nitrate Under Greenhouse Vegetable Production
摘要
Abstract
In order to clarify the impact of catch crops on greenhouse vegetable soil nitrate, explore the mechanism of barrier and controll soil nitrogen leaching losses in greenhouse, and provide a theoretical basis for control nitrogen leaching and prevention of groundwater pollution, this study selected the traditional greenhouse vegetable rotation system in North China plain as research subjects, using field situ remediation technologies on deep-root planting catch crops in the vegetable fallow period by sweet corn, Achyranthes bidentata and white Chrysanthe-mum. The results showed that:nitrogen content and nitrogen uptake of sweet corn and sweet corn with A chyranthes bidentata intercropping were the highest, respectively 20.11 t·hm-2, 19.62 t·hm-2 and 240.34 kg·hm-2, 287.56 kg·hm-2, significantly higher than white Chrysanthe-mum. The density of root length and root dry weight decreased with soil depth in the profiles, root length density was demonstrated in order as:intercropping sweet corn﹥sweet corn﹥white Chrysanthemum﹥intercropping Achyranthes bidentata blume. The reduction of NO3--N of sweet corn reached 907.87 kg·hm-2 in soil profile 0~200 cm, significantly higher than sweet corn and hyssop intercropping and white Chrysanthe-mums. In the interim period of vegetable crop rotation, planting catch crops could effectively reduce nitrate accumulation in the soil, control the soil profile nitrate leaching down.关键词
棚室蔬菜/填闲作物/NO3--N消减Key words
greenhouse vegetable/catch crop/NO3--N decrease分类
农业科技引用本文复制引用
尹兴,汪新颖,张丽娟,倪玉雪,任翠莲,巨晓棠,吉艳芝..填闲作物消减蔬菜生产棚室土壤硝态氮潜力研究[J].农业资源与环境学报,2015,(3):222-228,7.基金项目
河北省教育厅项目（Q2012130）；国家自然基金项目 （）
