[Relationships of soil microbial biomass with soil environmental factors in Tarim Desert highway shelter-forest].
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.
Jin
Zheng-zhong
ZZ
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China. jzz3501@126.com
Lei
Jia-qiang
JQ
Xu
Xin-wen
XW
Li
Sheng-yu
SY
Fan
Jing-long
JL
Zhao
Si-feng
SF
Zhou
Hong-wei
HW
Gu
Feng
F
D001673:Biodegradation, Environmental; D002681:China; D015169:Colony Count, Microbial; D003247:Conservation of Natural Resources; D003889:Desert Climate; D017753:Ecosystem; D010316:Particle Size; D054712:Salinity; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology; D014197:Trees / Q000254:growth & development* / Q000502:physiology
D012987:Soil