Jin Zheng-zhong, Lei Jia-qiang, Xu Xin-wen, Li Sheng-yu, Fan Jing-long, Zhao Si-feng, Zhou Hong-wei, Gu Feng
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
Ying Yong Sheng Tai Xue Bao. 2009 Jan;20(1):51-7.
By using correlation analysis, this paper studied the relationships of soil microbial quantity and biomass with soil physical and chemical factors and enzyme activities in highway shelter-forests of Tarim Desert, aimed to approach the interactions between microbes and environmental factors in aeolian sandy soil of extremely arid area. The results showed that soil microbial quantity and biomass in the shelter-forests had an increasing trend with the decrease of soil bulk density and particle size (R < -0.84) and the increase of soil moisture content and porosity (R > 0.85), with the correlation between soil microbial biomass and soil bulk density as the key. Soil microbial quantity and biomass were positively correlated with soil nutrient contents, mainly caused by the correlations of soil actinomycetes and microbial biomass C and P with soil available nutrients. Greater differences (R = 0.51-0.91) were observed in the correlations of soil enzyme activities with soil microbial quantity and biomass, which was mainly determined by the correlations of soil invertase and phosphatase activities with soil actinomycetes and microbial biomass C. The increase of soil salt content was not favorable to the accumulation of soil microbial biomass (R < -0.71), and there was a higher positive correlation (R > 0.63) between soil microbial amount and biomass. In practice, good soil condition should be established in the forestlands of arid area for the development of soil microbes and the promotion of soil matter cycling.
通过相关性分析，研究了塔里木沙漠公路防护林土壤微生物数量和生物量与土壤理化因子及酶活性的关系，旨在探讨极端干旱区风沙土中微生物与环境因子的相互作用。结果表明，防护林土壤微生物数量和生物量随土壤容重和粒径减小（R < -0.84）以及土壤含水量和孔隙度增加（R > 0.85）呈增加趋势，其中土壤微生物生物量与土壤容重的相关性为关键。土壤微生物数量和生物量与土壤养分含量呈正相关，主要是土壤放线菌以及微生物生物量碳和磷与土壤有效养分的相关性所致。土壤酶活性与土壤微生物数量和生物量的相关性差异较大（R = 0.51 - 0.91），主要由土壤蔗糖酶和磷酸酶活性与土壤放线菌及微生物生物量碳的相关性决定。土壤盐分含量增加不利于土壤微生物生物量积累（R < -0.71），土壤微生物数量与生物量之间存在较高正相关（R > 0.63）。实际中，干旱区林地应营造良好土壤条件，以促进土壤微生物生长和土壤物质循环。
