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。

关键词: 施肥, 黄绵土, 腐殖质结合形态, 土壤肥力

Abstract: The humus combined forms of lousoil and yellow loamy soilunder long-term application of chemical and organic fertilize rswere systemly studied through four fertilizer experiments. The results showed that long-term application of organicm anure or that combined with chemical fertilizer could in crease the contents of loosely combined humus, stably combined humus and tightly combined humus, and the ratio of loosely com b ined hum us to tight lycom bined humus was increased. Under the condiation flong-term application of chemicalfer tilizer, the tigh tly combined humus was increased and the ratio of loosely combined humus totightly combined humus was decreased.By means of path co efficient analysis and step reg ression analysis, it indicated that the loosely combined humus was closely related to soil hydrolytic N and available P, the stab lycom b ined hum us was closely related to soilav ailable P and CaCO₃, and the tightly combined humus was closely related to hydrolytic N and to ta lN .

Key words: Fertilization, Lousoll, Yellow loamysoil, Humus combined forms

中图分类号: 

• S153.622