Diversity of Soil Microbial Communities under Different Soil Salinity Levels Analyzing by PLFA

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Abstract:

Under different soil salinity levels, diversity of soil microbial communities from Hetao irrigated land of Inner Mongolia was studied by phospholipid fatty acid (PLFA) analysis. The study found that PLFAs biomass in saline soil was significantly lower than those of strongly salinized soil and slight salinized soil. Microbes was bacteria-based from these soil. The bacterial PLFA loading in saline soil is significantly less than those of strongly salinized soil and slight salinized soil . Cluster analysis showed that changes had obviously taken place on soil microbial composition and quantity under different soil salinity levels.About 76.89% of variation in PLFA patterns explained by PC1(the first  principal components),and 17:1, 16:0, 18:1w9c, 18:1w9t, 18:2, 18:3w3c, 12:0 were strongly negatively correlated with PC1.However,soil salinity and pH were positively correlated with PC1.We conclude that soil salinity has  a profound affect on the microbial community structure.

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Advanced Materials Research (Volumes 955-959)

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314-320

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June 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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