摘要
采用二次正交旋转设计,利用数学模型方法,定量地分析了农肥、化肥和秸秆还田对土壤有机质含量的影响及其相互间的作用;农肥、化肥和秸秆的贡献率分别为1.63,0和1.41.在95%的置信区间,维持土壤有机质在4%~5.5%的定量调控措施为:农肥、化肥和秸秆的年施入量分别是10.6~13.7t/hm2、0.45~0.57t/hm2和1.05~1.36t/hm2.
Using the mathematical model and the design of quadratic rotation regresslon,the effect of farm manure,chemical fcrtilizer and straw manure on soil OM content and their niteraction were quantitatively analysed.The contribution rates of farm manure,chemical fer tilizer and straw manure are1.63,0 and1.41 respectively.In order to maintain the soil OM at 4% to 5.5% under 95% confidence interval the amounts of manure,fertilizer and straw ap plied should be 10.6 to 13.7,0.45 to 0.57 and 1.05 to1.36 t/hm2,respectively.
出处
《东北农业大学学报》
CAS
CSCD
1994年第3期219-223,共5页
Journal of Northeast Agricultural University
关键词
回归模型
有机质
定量调控
土壤
施肥
model
organic matter
contribution rate
marginal effect
quantitative regulation