摘要
在鄂西南烟区研究了化肥不同施用方式对植烟土壤有效氮时空动态的影响。结果表明,在不栽烟模式下施肥后40 d左右肥料养分随雨水下渗已经基本损失完毕;在雨水较多年份底层土壤有效氮受表层土壤有效氮下渗补充较高。揭膜可能使土壤有效氮淋溶损失风险增大,同时在一定程度上有提高养分利用的可能性;提前施肥可使肥料养分在整个土体中分布均匀,且可能有效激发土壤有机养分矿化。
A field experiment was carried out on planting tobacco soil in the southwest of Hubei to study the effect of different fertilization pattern on available nitrogen space-time dynamic.The results showed that the nutrient of fertilizer was loss end with precipitation after fertilization 40d in no plant tobacco,available nitrogen of substrate soil received a large number of sup-plement from surface layer soil in pluvious years.Uncovering films could increase eluviation intensity of soil available nitro-gen,and improve the nutrient uptake efficiency of soil nutrient simultaneity.It made the nutrient of fertilizer uniformity dis-tributing in plow layer in advance fertilize treatment,and would excitate mineralization of soil organic nitrogen in effect.
出处
《湖北农业科学》
北大核心
2009年第1期66-69,共4页
Hubei Agricultural Sciences
基金
湖北省科技攻关项目(2006AA201C73)
关键词
施肥方式
有效氮
时空动态
fertilization pattern
available nitrogen
space-time dynamic
