Effects of Adjacent Different Vegetation Cover on Soil Microbial Community Size and Activity in Three Gorges Reservoir Area
The ecological environment of Three Gorges Reservoir area is highly and closely related to the eco-safety of Three Gorges Dam. Local land use and land-cover change can play a pivotal role in environmental and ecological changes and furthermore contribute to Three Gorges Dam. Changes in soil microbial community size and activity were examined compared with adjacent cypress site, citrus tree site and citrus tree site in Yichang. The results showed that soil organic carbon (OC), total nitrogen (TN), microbial biomass C (MBC), N (MBN), MBC/OC and MBN/TN in the cypress site was the highest among all vegetations. There is no significant difference between vegetable site and citrus tree site. The qCO2 was the highest under citrus site and the lowest under cypress site. The correlation analysis showed that soil MBC and MBN were positively correlated with organic C, total N, microbial N, MBC/OC and MBN/TN, and that qCO2 was negatively organic C (P<0.01), total N (P<0.01), MBC(P<0.05) and MBC/OC(P<0.05). Therefore, our results indicated that different vegetation cover had substantial effects on the size and activity of the soil microbial community and that cypress may increase the content of organic matter and microbial biomass, decrease the qCO2, hence, and improve soil quality.
vegetation cover soil organic matter microbial biomass C N qCO2
Jia Guomei Zhang Baolin Liu Cheng Wu Xu Chen Fangqing
College of Chemistry & Life Sciences, Three Gorges University, Yichang, 443002,China
国际会议
郑州
英文
836-842
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）