Chen Zheng, Yang Gui-de, Sun Qing-ye
Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Science, Anhui University, Hefei 230039, China.
Ying Yong Sheng Tai Xue Bao. 2009 Sep;20(9):2193-8.
Bio-crust is the initial stage of natural primary succession in copper mine tailings. With the Yangshanchong and Tongguanshan copper mine tailings in Tongling City of Anhui Province as test objects, this paper studied the soil microbial biomass C and N and the activities of dehydrogenase, catalase, alkaline phosphatase, and urease under different types of bio-crust. The bio-crusts improved the soil microbial biomass and enzyme activities in the upper layer of the tailings markedly. Algal crust had the best effect in improving soil microbial biomass C and N, followed by moss-algal crust, and moss crust. Soil microflora also varied with the type of bio-crust. No'significant difference was observed in the soil enzyme activities under the three types of bio-crust. Soil alkaline phosphatase activity was significantly positively correlated with soil microbial biomass and dehydrogenase and urease activities, but negatively correlated with soil pH. In addition, moss rhizoid could markedly enhance the soil microbial biomass and enzyme activities in moss crust rhizoid.
生物结皮是铜尾矿自然原生演替的初始阶段。以安徽省铜陵市的杨山冲和铜官山铜尾矿为试验对象，研究了不同类型生物结皮条件下土壤微生物生物量碳、氮以及脱氢酶、过氧化氢酶、碱性磷酸酶和脲酶的活性。生物结皮显著提高了尾矿上层土壤的微生物生物量和酶活性。藻类结皮在提高土壤微生物生物量碳和氮方面效果最佳，其次是苔藓 - 藻类结皮，苔藓结皮效果相对较差。土壤微生物区系也随生物结皮类型而变化。三种类型生物结皮条件下土壤酶活性未观察到显著差异。土壤碱性磷酸酶活性与土壤微生物生物量、脱氢酶和脲酶活性显著正相关，但与土壤pH呈负相关。此外，苔藓假根能显著提高苔藓结皮假根处的土壤微生物生物量和酶活性。
