摘要
对长期施用化肥和有机肥腐殖质结合形态进行了系统研究，结果表明，土和黄绵土腐殖质以紧结态含量为主，其次是松结态，再次是稳结态；长期施有机肥或配施化肥，土壤腐殖质含量增加，松／紧（松结态／紧结态，下同）比值提高；长期施用化肥，紧结态腐殖质含量增加，松／紧比值降低；与松结态腐殖质关系最为密切的农化性状是碱解氮和速效磷，与稳结态腐殖质关系最为密切的是速效磷和ＣａＣＯ３，与紧结态腐殖质关系最为密切的是碱解氮和全氮。
The humus combined forms of lou soil and yellow loamy soil under long term application of chemical and organic fertilizers were systemly studied through four fertilizer experiments.The results showed that long term application of organic manure or that combined with chemical fertilizer could increase the contents of loosely combined humus,stably combined humus and tightly combined humus,and the ratio of loosely combined humus to tightly combined humus was increased.Under the condiation of long term application of chemical fertilizer,the tightly combined humus was increased and the ratio of loosely combined humus to tightly combined humus was decreased. By means of path coefficient analysis and step regression analysis,it indicated that the loosely combined humus was closely related to soil hydrolytic N and available P,the stably combined humus was closely related to soil available P and CaCO 3,and the tightly combined humus was closely related to hydrolytic N and total N.
出处
《华北农学报》
CSCD
北大核心
1997年第3期88-93,共6页
Acta Agriculturae Boreali-Sinica
