摘要
[目的]通过田间试验研究秸秆和DCD对冬小麦不同生育期施入尿素土壤行为的影响。[方法]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]在田间条件下,在尿素配施DCD的处理中,在一定时间内土壤NO3-N数量明显低于未加DCD处理;在配施秸秆处理中,秸秆加入后,延缓了硝化作用的发生以及土壤NO3-N的积累速率。[结论]该研究为揭示尿素在土壤中的行为特征及合理施用尿素提供理论依据。
[Objective] The field experiment was conducted to study the effects of straw and DCD on the behavior of urea application in different growth stages of winter wheat.[Method] Five treatments of no application of straw（CK）,urea（U）,urea and DCD（U＋DCD）,urea and straw（U＋S）and urea combined application of DCD and straw （U＋DCD＋S）were set up to study the effects of straw and DCD on the behavior of urea application in different growth stages of winter wheat.[Result] Under the treatments of urea combined application of DCD,the amount of soil NO-3-N were lower than no DCD treatment and the treatments of urea combined application of straw could retard soil nitrification and the accumulation rate of soil NO-3-N in the whole winter wheat season.[Conclusion] The research provided theoretical basis for revealing the behavior characteristics of urea in soil and the reasonable fertilization of urea.
出处
《安徽农业科学》
CAS
北大核心
2010年第10期5176-5177,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)
