首页|N-catch crops affect soil profile nitrate-N accumulation during vegetable cultivation
N-catch crops affect soil profile nitrate-N accumulation during vegetable cultivation
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
To reduce nitrate leaching, the effects of three N-catch crops of sweet corn (Zea mays L.), amaranth (Amaranthus spp.), and sweet sorghum (Sorghum Linn.) on nitrate-N accumulation in the soil profile were examined using an incubation experiment. Results showed that the biomass and N absorbed by sweet corn were the largest compared with the other two N-catch crop treatments. Root length density for sweet corn, amaranth, and sweet sorghum in the 0-150 cm soil layer was 0.66, 0.34 and 0.46 cm/cm3, respectively, and root dry weight was 0.065, 0.021 and 0.038 mg/cm3, respectively. In the 0-200 cm soil layer, nitrate-N accumulation for fallow, mature sweet sorghum, amaranth, and sweet corn was 1124.7, 899.4, 867.4 and 794.2 kg/hm2, respectively, where the treatment of sweet corn had the smallest N-accumulation. The nitrate-N leachability of fallow, sweet corn, amaranth, and sweet sorghum treatment was 3.6, 1.9, 2.4 and 2.6 kg/hm2, respectively, indicating that cropping of sweet corn, amaranth, and sweet sorghum could reduce the leachability by 47%, 35% and 28% in comparison with fallow treatment. Therefore, the cultivation of N-catch crops can reduce nitrate leaching in seasonal soil, and the sweet corn might be the most suitable catch crop.
N-catch cropssoil NO3-Nleaching
Yanzhi JI、Xiaotang JU、Wanzhong FENG、Lijuan ZHANG、Shuqing LIU
展开 >
College of Resources and Environmental Sciences,Agricultural University of Hebei,Baoding 071000,China
College of Resources and Environmental Sciences,China Agricultural University,Beijing 100094,China
Great Wall College,China University of Geosciences,Baoding 071000,China
Agricultural Engineering Research Center of North China Mountain Country,Baoding 071001,China
展开 >
国家自然科学基金国家自然科学基金National High Technology Research and Development Program of China (the 863 project)Ministry of Science & Technology of China During the 1lth Five-year Plan
NETL
NSTL
万方数据
