In the 4-,15-and 32-year artificial forest of Cunninghamia laneolata,the net bags of different ratio C.laneolata and Michelia macclurei litterfalls and blank control plots were conducted.Biolog technique was used to analyze the microbial diversity index and the carbon metabolism diversity in 0～ 5 cm soil layer under different proportioned litterfalls,and to study the effects of different proportioned litterfalls on the carbon source utilization and microbial diversity of soil microbes.The result showed that the total soil microbial metabolic activity (average well color development,AWCD) was 32 a＞ 15 a＞4 a.The total metabolic activity under C1M2 treatment in the 4-year topsoil was the highest than other treatments.The difference of Shannon and Simpson index in topsoil was not significant,and the effect of C1M2 (P=0.001) on McIntosh index of soil microbial was significant.The main types of carbon source utilization in those plantations were carbohydrate,polymer and amino acid,which was under C2MI and C treatments were clustered into one group,but under C1M2, C1M1 and M treatments in the 15-,32-year stands were clustered into another group.
artificial forest of Chinese firratio of litterfallsoil microbialdiversity of carbon metabolism
国家科技期刊平台
NSTL
维普
万方数据
