Effects of land use patterns on soil microbial biomass in coalmine dump
Experiment were designed to examine effects of land use pattems on soil organic C (SOC), soil total N (TN) and soil microbial biomass C, N (SMBC, SMBN) in Chinese Haizhou opencast mine dump. Here, land use models were engineering reclamation (ER), planted forests (Ulmus pumila, Robinia pseudoacacia and Amorpha fruticosa)(PF), natural grassland (NG) and bare land (BL).The results showed that both SOC and TN contents were significantly higher in both PF and NG soils than in other soils(p<0.05). SMBC and SMBN were significantly lower in BL soils than in other soils. SMBC was highest in the U. pumila soils at 357.95 mg C kg-1 soil. SMBN was highest in the R. pseudoacacia soils at 64.80 mg C kg-1 soil. The content of SMBC and SMBN decreased with soil layer being deepened. There were significant correlations between TN and SMBC, SMBN at 0.05 level. SMBC accounted for 1.15-4.03％ and 0.63-1.91％ of the SOC content in O to 10 and 1O to 20 cm soil layers, respectively. Correlation analysis indicated that both SMBC and SMBN were positive related to SOC or TN. The results suggested that land use types affected soil microbial biomass by improving soil chemical properties (SOC, TN).
Microbial biomass Coalmine dump Land use pattern
Han YAN Xiang-yun Wu Hai-ying Wang Jing Huang Zhi-ming He
College of Science, Liaoning Technical University, Fuxin, 123000, China
国际会议
西安
英文
320-324
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）