RESEARCH ON SOIL FERTILITY CHANGES IN ARTIFICIAL FOREST OF DIFFERENT TYPES
不同类型人工林土壤肥力变化的研究

Research results on changes of organic matter,rapidly available nitrogen,total nitrogen,rapidly available phosphorus,total phosphorus,rapidly available potassium and humic acids(humic acid,fulvic acid) in soils under pure wetland pine forest,wetland pine-Schima.miXed forest,and btoad-leaved Sckima indicatethat soil fertility for nine-year age wetland pine forest tends to decline due to fewer witherers fall and slower decuomposition ability.However,soil fertility conditions of forest land can be effectiveli imptoved as the witherers fall in wetland pine-Schima mixed forest and broad-leaved Schima forest have relative sufficient decomposition ability.