摘要
为完善秸秆集中沟埋技术体系,本试验设置集中掩埋深度50 cm、35 cm、20 cm和埋草量15 kg/m2、10kg/m2、5 kg/m2处理,在2010年6月至10月、2011年6月至10月进行麦秸集中沟埋还田模拟试验。结果显示,埋草深度35 cm、埋草量5 kg/m2处理可以显著降低稻田渗漏液日平均总氮浓度及总氮量,其中2010年与2011年日平均总氮浓度分别比无秸秆还田对照降低17.20%和12.47%,总氮量分别比对照降低10.90%和14.07%。秸秆还田后,稻田渗漏液量随之增加,且埋草量越多,渗漏量越大。因此,适宜的还田量和还田深度能够减少氮素的淋失,减少环境污染。
To improve the technological system of straw burial in soil for returning, burial depths of 50 cm, 35 cm and 20 cm and burial amount of 15 kg/ m2 ,10 kg/ m2 ,5 kg/ m2 were set to conduct two season wheat straw burial trials from June to October, 2010 and June to October, 2011. The results showed that the burial depth of 35 cm and buried amount of 5 kg/ m2 could significantly reduce the average daily nitrogen and total nitrogen in the leakage of paddy field. Compared with control, the average daily nitrogen contents in 2010 and 2011 were reduced by 17.20% and 12.47%,and the total nitrogen were reduced by 10.90% and 14.07%. After wheat straw returning, the paddy field leakage increased, and the more wheat straw buried, the greater the leakage. Therefore, appropriate amount and depth of buried straw for returning can reduce nitrogen leaching, improve nutrient utilization, and reduce environmental pollution.
出处
《江苏农业学报》
CSCD
北大核心
2013年第4期784-790,共7页
Jiangsu Journal of Agricultural Sciences
基金
公益性行业(农业)科研专项经费课题(201103001)
关键词
秸秆集中沟埋还田
埋草深度
埋草量
氮素淋失
straw burial in soil for returning
burial depth
burial amount
nitrogen leaching
