不同凋落叶分解的土壤微生物效应

研究了8个树种凋落叶分解的土壤微生物效应．结果表明：凋落叶分解影响下的土壤与空白对照土壤相比，微生物生物量有明显提高，且分解越快的凋落叶，在其影响下土壤微生物生物量越大；南洋楹、大叶相思、马占相思和荷木等树种凋落叶分解影响下的土壤微生物量较大，有较好的土壤微生物效应，而湿地松和马尾松凋落叶的土壤微生物效应则较差．

Effect of Different Leaffall Decomposition on Soil Microorganisms

The effect of leaffall decomposition for 8 tree species on soil microorganisms was studied in this paper. Soil microbial biomass affected by the decomposition of leaffall was higher than check soil microbial biomass. The more leaffall decomposed, the more soil microbial biomass appeared. The soil affected by the decomposition of leaffall for several tree species, including Albizzia folcata, Acacia auriculiformis, Acacia magium and Schima superba had higher microbial biomass; while the soil affected by decomposition of leaf litters for Pinus elliottii and Pinus massoniana had the reverse effect. It is considered that the effects of soil microbes is better in the former soil than that in the latter soil.