广西5种人工林地土壤微生物数量及土壤酶活性分析

发布时间：2018-09-05 09:14

【摘要】：为当地珍贵速生树种人工林的发展及合理利用提供理论依据。分析广西5种珍贵树种人工林土壤微生物数量及土壤酶活性差异,以相同立地条件下12年生的黑木相思(Acacia melanoxylon)、老排(Mytilaria laosensis)、红椎(Castanopsis hystrix)、黧蒴椎(Castanopsis fissa)和火力楠(Michelia macelurei)人工纯林为研究对象,采用稀释平板涂布法和土壤酶活性测定法,测定和分析该5种人工林地土壤微生物数量及酶活性。结果表明:5种林地的土壤微生物总数和细菌数量大小均为:火力楠黧蒴锥红椎黑木相思米老排。但5种林地的土壤酶活性大小不一,蔗糖酶、脲酶、蛋白酶、酸性磷酸酶活性在5种林地之间的差异极其显著,而过氧化氢酶活性不显著。5种林地中土壤酶活性相对较强的是米老排人工林,较弱的是黑木相思林和火力楠林。土壤酶活性与微生物数量的相关分析表明,土壤中蔗糖酶活性与放线菌数量呈极显著正相关关系,其余相关性没有达到显著水平。
[Abstract]:It provides theoretical basis for the development and rational utilization of local precious fast growing tree plantation. The soil microbial quantity and soil enzyme activity of five precious tree species in Guangxi were analyzed. The artificial pure forest of (Castanopsis fissa) of capsule of Lathyrus sativus (Acacia melanoxylon), and (Michelia macelurei) of Fructus Fructus (Michelia macelurei), aged 12 years under the same site, was used as the research object. The soil microorganism quantity and enzyme activity in the five plantations were determined and analyzed by dilution plate coating method and soil enzyme activity method. The results showed that the total number of microbes and the number of bacteria in the soil of 5 species of forest land were as follows: Lathyrus fissa, red vertebrae, black vertebrae, Acacia chinensis, Lathyrus sativus. However, the soil enzyme activities of the five woodlands were different, and the activities of sucrase, urease, protease and acid phosphatase were significantly different among the five woodlands. But the soil enzyme activity was relatively strong in 5 kinds of woodland, and was weaker in acacia forest and firewood forest. The correlation analysis between soil enzyme activity and microbial quantity showed that there was a very significant positive correlation between soil sucrose enzyme activity and actinomycetes, but no significant correlation was found in the rest.
【作者单位】：广西农业科学院;广西大学;
【基金】：国家自然科学基金项目(31170617) 广西林业科技项目(林科字[2013]第11号) 广西农业科学院基本科研业务专项(桂农科2016YM37) 广西科学研究与技术开发计划项目(桂科攻1598006-1-1D)
【分类号】：S714.3

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