尖峰岭不同树种枯落物分解过程中微生物动态

Dynamics of microorganisms in litters of different tree species at Jianfengling

为探索微生物在森林枯落物分解中的作用及其在不同气温条件下的变化规律,采用枯落物袋法,研究海南岛尖峰岭热带常绿季雨林枯落物(青梅Vitica mangachapoi,木荷Schimasuperba和混合枯落物)中细菌、真菌和放线菌三大微生物数量的季节变化。结果表明:混合枯落物和木荷枯落物中细菌数量最多,放线菌次之,真菌最少;青梅枯落物中细菌数量最多,真菌次之,放线菌最少。3种枯落物中微生物总数是混合枯落物中最多,木荷次之,青梅最少。同一微生物类群在枯落物中的数量有明显的季节变化,不同类群季节变化规律不尽相同,但基本只有1个峰值。

The purpose is to explore the function of microbes in the litter decompose and its change in different air temperatures.The seasonal dynamics of quantity of bacteria, fungi andactinomycetes from different litters （Vatica mangachapoi Schima superba and the mixed） of tropical evergreen seasonal rain forest of Jianfengling were studied by litter bag. The results showed that in the mixed and Schima superba leaf litters, the quantity of bacteria was the most, the quantities of actinomycetes and fungi were less. in Vatica mangachapoi leaf litter, the number of bacteria is the most, fungi is the next, and actinomyces is the smallest. The total microbial amount of the mixed was the most, the next in order was Schima superba and Vatica mangachapoi. There was distinctive seasonal change in quantity of each microbial group. [ Ch, 2 tab. 9 ref. ]