摘要
通过对发育于江西省中亚热带典型红壤地区泥质岩和花岗岩上天然常绿阔叶林下的土壤质量性状的研究,结果表明,天然常绿阔叶林植被下表层350kg/m2土壤的土层深厚、容重小,有机质、全N和CEC水平高,但是土壤速效养分水平低。进一步比较发现,生态系统进化到常绿阔叶林这种生态系统的顶极状态,这两种母质类型上土壤表层350kg/m2土层的总厚度、平均容重、总有机质含量、总N量和土壤pH具有趋同性;而母质性状的差异却使该土层中凋落物层干物质量及其P、K含量、矿质土层的容重与厚度、土壤BS和速效N、P、K含量表现出极显著的差异。
Quality of soils developed from both pelite and granite under primary broad-leaved forest are studied on two sites where soils showed minimum anthropic disturbance in Tonggou County and Dexing County respectively in the mid sub-tropic red soil region, Jiangxi ProvinceOn each site,litter samples were collected by layers,mineral soils were sampled at 5cm depth interval in the 10cm top soil and at 10cm interval below this layer to 50cm depth after 6 sampling points were determined in random gridding methods with an gridding interval of 30mThe results of the study show that soils quality under that vegetation are characterized by deep soil layer,low bulk densities,high soil organic matter and total N and CEC,but low available N,P and K in the equivalent soil mass of 350 kg/m2 of surface soilsFarther comparison of the quality indictors of soils formed from the two parent materials reveals that total soil thickness,mean soil bulk density,total organic matter,total N and pH indicate no significant statistical differences as the local ecosystem reaches its climax;While the soil quality indicators including dry weight of litter layer,total P,total K,CEC,BS,bulk density and thickness of mineral soil, and available N,P,K between them show extremely remarkable differences that reflecting the great mineralogical and chemical distinctness of their parent materials
出处
《山地学报》
CSCD
2003年第1期73-79,共7页
Mountain Research
基金
国家科委重大基础研究973项目(G199011801)
江西省自然科学基金项目(0100002)
中国科学院"九五"重大项目(KZ951-A1-301)
特别支持项目(KZ95T-04-01)支持~~
