摘要
对轮作及大豆、玉米、小麦长期连作白浆土中氮含量及有机态氮组分变化进行研究。结果表明,在不施肥情况下,小麦连作区土壤中全氮、碱解氮降幅最大,酸解总氮、氨基酸态氮和氨基糖态氮降幅最小。在施有机肥情况下,土壤全氮、碱解氮及酸解总氮则以小麦连作区增幅最小,玉米连作区增幅最大;氨基酸态氮和氨基糖态氮在轮作区增幅最大。其他组分氮在轮作与连作小区间变化无规律。
The nitrogen contents and nitrogen forms were studied in albic soil with long-term crop rotation and soybean, maize, wheat continuous cropping. The results indicated that under no fertilization condition, the decreasing range of total nitrogen, alkaline-hydrolyzable nitrogen were largest, but hydrolizable nitrogen, amino acid nitrogen, amino sugar nitrogen were least in the wheat continuous cropping plot. Under applying manure condition, the increasing range of total nitrogen, alkaline-hydrolyzable nitrogen were least in the wheat continuous cropping plot, but were largest in the maize continuous cropping plot. The increasing range of amino acid nitrogen and amino sugar nitrogen were largest in crop rotation plot, and the variation of the other nitrogen forms could not been found law in the two cultivations.
出处
《水土保持学报》
CSCD
北大核心
2007年第1期185-187,共3页
Journal of Soil and Water Conservation
基金
黑龙江教委项目(9541068)
关键词
白浆土
轮作
连作
氮素
albic soil
crop rotation
continuous cropping
nitrogen
