摘要
[目的]研究秸秆和DCD对冬小麦不同生育期施入尿素土壤行为的影响—硝态氮的淋失特征。[方法]通过田间试验,在不同时期取土样,采用连续流运分析仪法测定NO3-N。试验设5个处理:对照(不施秸秆、DCD和尿素,CK);单施尿素(U);尿素+秸秆(U+S);尿素+DCD(U+DCD);尿素+秸秆+DCD(U+S+DCD)。[结果]在田间试验条件下,总的趋势是加DCD的2个处理能有效减少NO3-N的淋失;加入秸秆后虽能减少部分NO3-N向下淋洗,但作用不明显。[结论]DOD和秸秆对不同时期施入尿素的土壤行为和硝态氮的淋失特征均产生一定影响。
[Objective] The aim was to study the effects of straw and DCD on the behavior of urea in different growth stages winer wheat：the leaching characteristics of NO3--N.[Method]Earth samples were obtained at different times by field test,and NO3--N was determined by continuous flow analytical.Five treatments of no application of straw（CK）,urea（U）,urea and DCD（U＋DCD）,urea and straw（U＋S）,urea combined application of DCD and straw（U＋DCD＋S）were set.[Result]Under the treatments of urea combined application of DCD,the amount of soil NO3--N leaching losses were lower than no DCD treatments,and the treatments of urea combined application of straw was no significant differences existed in soil NO3--N leaching losses at the different winter wheat stages.
出处
《安徽农业科学》
CAS
北大核心
2010年第12期6419-6420,共2页
Journal of Anhui Agricultural Sciences
基金
山东省优秀中青年科学家奖励基金(2004BS08002)
作者简介
宋建国（1965-），男，辽宁岫岩人，博士，副教授，从事环境生物养分循环研究工作。
通讯作者
