杉木混交林土壤微生物及生化特征和肥力

studies on Soil Microoganisms and Biochemical Properties in Mixed Forests of Chinese Fir

测定了杉木与鹅掌楸、拟赤杨、木荷、檫树和香樟等５个树种的混交林土壤特征。结果表明：混交林土壤微生物数量比杉木纯林高７．１９％～４１．３１％，土壤脲酶、转化酶、过氧化氨酶、多酚氧化酶和呼吸强度均比纯林高；土壤有机质、全氮、全磷、水解成、速效磷和速效钾普遍高于纯林。

This paper analyses the number of soil microoganisms and biochem-ical propert ies in mixed forests of Chinese fir with Liriodendron chinense,Alniphyllum forluner, Schima Superba, Sas Sassafras tsumu and Cinnamomum camphora.The soil microoganisms in mixed forests were higher by 7.19%～41.32%,andthe soil in mixed forest contained a higher level of the emzyme activity,N,P,K fertilities and organic matters than that in pure forest of Chinese fir.