[1]JIA Guomei,HE Li,CHENG Hu,et al.Ecological Stoichiometry Characteristics of Soil Microbial Biomass Carbon, Nitrogen and Phosphorus Under Different Vegetation Covers in Three Gorges Reservoir Area[J].Research of Soil and Water Conservation,2016,23(04):23-27.
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Ecological Stoichiometry Characteristics of Soil Microbial Biomass Carbon, Nitrogen and Phosphorus Under Different Vegetation Covers in Three Gorges Reservoir Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 04 Page number: 23-27 Column: Public date: 2016-04-28
Title:
Ecological Stoichiometry Characteristics of Soil Microbial Biomass Carbon, Nitrogen and Phosphorus Under Different Vegetation Covers in Three Gorges Reservoir Area
Author(s):
JIA Guomei1,2, HE Li1, CHENG Hu1, WANG Shitong1, XIANG Hanyu1, ZHANG Xuefei1, XI Ying1
1. College of Biological and Pharmaceutical Sciences, Three Gorges University, Yichang, Hubei 443002, China;
2. International Center for Ecological Protection and Management in the Three Gorges Area, Three Gorges University, Yichang, Hubei 443002, China
Keywords:
stoichiometry; vegetation cover; MBC; MBN; MBP
CLC:
S154.36
DOI:
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Abstract:
Microbial mineralization and immobilization of nutrients strongly influence soil fertility. Three vegetation types (cypress site, citrus tree site and vegetable site) were chosen to determine characteristics of Soil Microbial Biomass Carbon (MBC), Nitrogen(MBN) and Phosphorus (MBP) and their relationship in Dianjun, Yichang, Hubei. The results showed that the contents of soil microbial biomass C(MBC) and N(MBN) of cypress site were significantly higher than those of vegetable site and citrus tree site which were not significant different, microbial biomass P(MBP) followed the order:vegetable site > cypress site > citrus tree site. Soil organic carbon and total nitrogen showed a significant positive relationship with MBC, N (p < 0.01). Soil total P had a significant positive relationship with MBP (p<0.01). This indicated that soil microbial biomass was a sensitive indicator of soil fertility. Although soil MBC/MBN had no significant difference among three vegetation covers, MBC/MBP and MBN/MBP followed as the order:citrus tree site > cypress site > vegetable site. MBP showed a significant positive relationship with soil MBC/MBP and MBN/MBP whereas MBC, N had no significant relationship with MBC/MBN, MBN/MBP and MBC/MBP, indicating that the changes in MBC/MBP and MBN/MBP were mainly affected by soil MBP.
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