TY - JOUR
T1 - Microbial responses to erosion-induced soil physico-chemical property changes in the hilly red soil region of southern China
AU - Li, Zhongwu
AU - Xiao, Haibing
AU - Tang, Zhenghong
AU - Huang, Jinquan
AU - Nie, Xiaodong
AU - Huang, Bin
AU - Ma, Wenming
AU - Lu, Yinmei
AU - Zeng, Guangming
N1 - Funding Information:
This study was financially supported by the National Natural Science Foundation of China ( 41271294 ) and the ‘Hundred-talent Project’ of the Chinese Academy of Sciences. We would like to thank Linjing Deng and Shuang Nie of Hunan University for their assistance with DGGE analysis, and Yanbiao Hu, Hongbo Yao of Hunan University for the sampling and laboratory analysis.
Publisher Copyright:
© 2015 Elsevier Masson SAS.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - Water erosion can significantly alter soil physicochemical properties. However, little is known about soil microbial responses to erosion-induced soil physicochemical properties changes in the hilly red soil region of southern China. This research was conducted to determine the impact of water erosion on soil biological properties and the relationships between microbial community compositions and physico-chemical parameters. Soil samples of the 0-10 cm layer in one fallow depositional site and five erosional sites (including a Pinus massoniana Lamb. site, Elaeocarpus decipiens Hemsl. site, Michelia maudiae Dunn site, Cinnamomum bodinieri Levl. site and Lagerstroemia indica Linn. site) were collected. Denaturing gradient gel electrophoresis (DGGE) profiles of 16S rDNA were generated to describe the influence of soil erosion on bacterial communities. The results showed that the depositional site had greater microbial biomass and enzyme activities compared to most erosional sites. Redundancy analysis suggested that all physico-chemical parameters together accounted for 79.6% of the variation in bacterial community (P < 0.05). Among these parameters, dissolved organic carbon (DOC) showed a predominant effect on the variation (19.3%; P < 0.05), while soil organic carbon (SOC) and total nitrogen individually contributed to only 3% and 2.5% of the variance in bacterial community, respectively (P > 0.05). These results indicated that soil deposition is beneficial to enhance soil microbial biomass, while soil erosion is in reverse. DOC is a more important factor influencing soil biological characteristics in comparison to other measured physicochemical parameters. Relative to the quantity of SOC, the quality of C is more important in influencing soil biological properties.
AB - Water erosion can significantly alter soil physicochemical properties. However, little is known about soil microbial responses to erosion-induced soil physicochemical properties changes in the hilly red soil region of southern China. This research was conducted to determine the impact of water erosion on soil biological properties and the relationships between microbial community compositions and physico-chemical parameters. Soil samples of the 0-10 cm layer in one fallow depositional site and five erosional sites (including a Pinus massoniana Lamb. site, Elaeocarpus decipiens Hemsl. site, Michelia maudiae Dunn site, Cinnamomum bodinieri Levl. site and Lagerstroemia indica Linn. site) were collected. Denaturing gradient gel electrophoresis (DGGE) profiles of 16S rDNA were generated to describe the influence of soil erosion on bacterial communities. The results showed that the depositional site had greater microbial biomass and enzyme activities compared to most erosional sites. Redundancy analysis suggested that all physico-chemical parameters together accounted for 79.6% of the variation in bacterial community (P < 0.05). Among these parameters, dissolved organic carbon (DOC) showed a predominant effect on the variation (19.3%; P < 0.05), while soil organic carbon (SOC) and total nitrogen individually contributed to only 3% and 2.5% of the variance in bacterial community, respectively (P > 0.05). These results indicated that soil deposition is beneficial to enhance soil microbial biomass, while soil erosion is in reverse. DOC is a more important factor influencing soil biological characteristics in comparison to other measured physicochemical parameters. Relative to the quantity of SOC, the quality of C is more important in influencing soil biological properties.
KW - Bacterial community
KW - Dissolved organic carbon
KW - Enzyme activity
KW - Soil biological characteristic
KW - Soil erosion
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U2 - 10.1016/j.ejsobi.2015.10.003
DO - 10.1016/j.ejsobi.2015.10.003
M3 - Article
AN - SCOPUS:84945139603
SN - 1164-5563
VL - 71
SP - 37
EP - 44
JO - European Journal of Soil Biology
JF - European Journal of Soil Biology
ER -