摘要
采用微区模拟施肥后春耕耕整稻田控水减排试验,研究了稻田施肥耕整后田面水中氮磷浓度的分布特征,排水时间及溢流堰排水高度对田面水氮磷的流失和减排效能。结果表明:春耕耕整后,若控制6 cm高排田面水,较常规控制3 cm高排水,可减少排放总氮35.76%～72.13%,总磷20.41%～50%。稻田耕整后蓄水6 cm高在第5 d排水比在3 d内排水可减少排放总氮21.22%～55.41%,减少排放总磷67.67%～83.70%。
Water-control and emission reduction experiments were carried out in the spring tillage paddy fields which have been conducted simulative fertilization in micro-region,the distribution of nitrogen and phosphorus in the surface water and the effects of different drainage times and heights of overflow weir on the loss characteristics of nitrogen and phosphorus in the surface water and the performance of emission reduction were studied.The results indicated that after spring tillage,in comparison with the conventional water management whose height of overflow weir was 3 cm,the appropriate height of overflow weir should be 6 cm,it could reduce the emission of TN by 35.76%～72.13% and TP by 20.41%～50%.After spring tillage,as compared with the conventional water management which drained within 3 days after filling water in overflow weir with the height of 6 cm,the appropriate time to drain was the fifth day after saving water 6 cm,it could reduce the emission of TN by 21.22%～55.41% and TP by 67.67%～83.70%.
出处
《江西农业学报》
CAS
2010年第5期122-124,共3页
Acta Agriculturae Jiangxi
基金
国家高技术研究发展计划(863计划)(2005AA601010-03)
国家科技部重大水专项(2008ZX07211-001)
关键词
控排水
氮磷
流失特征
减排效能
Controlled drainage
Nitrogen and phosphorus
Loss characteristics
Performance of emission reduction
