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OALib Journal期刊
ISSN: 2333-9721
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生态环境因子对四川松茸菌塘土壤微生物的影响
DOI: 10.3724/SP.J.1145.2014.07011, PP. 164-169
Keywords: 松茸,微生物活性,微生物生物量,土壤酶,藏区,攀西地区
Abstract:
以四川藏区和攀西松茸代表产区菌塘土壤为研究对象，测定菌塘土壤细菌、放线菌和真菌的菌落数量，土壤微生物的生物量碳和氮，以及土壤酸性磷酸酶、脲酶和过氧化氢酶活性，采用多元回归树分析生态环境因子对微生物的影响.结果表明：当海拔高于3592m时，在一定范围内海拔越高（3841-3860m），土壤酶活性越高；当海拔低于3592m时，枯枝落叶层厚度越厚（2.25-8.45cm）、海拔越低（3058-3226m），土壤酶活性越高.当坡度大于或等于42.5°时，一定范围内枯枝落叶层厚度越高（1.05-8.45cm）、海拔越低（3058-3225m），松茸菌塘微生物生物量及菌落数量越高；而当坡度小于42.5°时，在一定范围内海拔越低（3058-3460m）、枯枝落叶厚度越薄（0.28-3.2cm）越有利于松茸菌塘土壤微生物生物量和菌落数量积累.总之，海拔、坡度及枯枝落叶厚度是影响松茸菌塘土壤微生物活性和生物量的3个关键因素.
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