一、二代马尾松林土壤微生物数量及酶活性垂直分布特征
发布时间：2018-08-26 08:38
【摘要】：【目的】揭示连栽马尾松林根际土壤环境在垂直方向上的变化。【方法】以不同栽植代数的马尾松人工林作为研究对象,采用配对样地法,于2015年10月,对比研究不同代马尾松人工林的根际与非根际土壤可培养微生物数量及土壤酶活性土层垂直变化特征。【结果】两代马尾松人工林根际土壤可培养微生物数量与酶活性的土层垂直分布特征明显,均表现为在0~10cm土层最高,在10~20cm土层较低,在20~30cm土层最低;同层次不同代之间比较,二代林根际土壤可培养微生物数量及酶活性均高于一代林,除土壤脲酶活性在代际间没有统计学意义上的差异外,其余酶的活性和3大类微生物数量在代际间的差异具有统计学意义(p0.05);两代马尾松人工林各土层根际可培养微生物数量与酶活性皆高于非根际,随着土层加深,根际与非根际间没有呈现出明显相关规律;两代马尾松林微生物与土壤酶呈统计学意义上的正相关关系(p0.01)。【结论】连栽提高了马尾松林根际土壤微生物数量和酶活性,二代林根际土壤性质在土层垂直方向上的表现均优于一代林。
[Abstract]:[objective] to reveal the vertical change of soil environment in the rhizosphere of continuous planted Pinus massoniana forest. [methods] the Pinus massoniana plantation with different planting algebras was used as the research object, and the matched plot method was used in October 2015. The number of culturable microorganisms in rhizosphere and non-rhizosphere soil and the vertical variation of soil enzyme activity in different Pinus massoniana plantations were studied. [results] the number of culturable microorganisms in rhizosphere soil of two generations of Pinus massoniana plantations was compared with that of non-rhizosphere soil. The vertical distribution of enzyme activity in soil layer was obvious. They were the highest in the 0~10cm soil layer, the lowest in the 10~20cm soil layer and the lowest in the 20~30cm soil layer, and the number of culturable microorganisms and the enzyme activity of the second generation rhizosphere soil were higher than that of the first generation forest, compared with the same layer and different generations. There was no significant difference in soil urease activity between generations. The activity of other enzymes and the number of three kinds of microorganisms were significantly different between generations (p0.05), the number and activity of culturable microbes in rhizosphere of two generations of Pinus massoniana plantation were higher than that of non-rhizosphere, and with the deepening of soil layer, the number of culturable microorganism and enzyme activity of the two generations of Pinus massoniana plantation were higher than that of non-rhizosphere. There was no obvious correlation between rhizosphere and non-rhizosphere, and there was a positive correlation between soil enzyme and microorganism in two generations of Pinus massoniana forest (p0.01). [conclusion] continuous cultivation increased the number and enzyme activity of soil microorganism in Pinus massoniana forest rhizosphere. The soil properties of the rhizosphere of the second generation forest are better than that of the first generation forest in the vertical direction of soil layer.
【作者单位】： 贵州大学林学院;贵州省森林资源与环境研究中心;
【基金】：国家科技支撑课题(No.2015BAD09B01) 贵州大学研究生创新基金(No.研农2016015)
【分类号】：S714.3
[Abstract]:[objective] to reveal the vertical change of soil environment in the rhizosphere of continuous planted Pinus massoniana forest. [methods] the Pinus massoniana plantation with different planting algebras was used as the research object, and the matched plot method was used in October 2015. The number of culturable microorganisms in rhizosphere and non-rhizosphere soil and the vertical variation of soil enzyme activity in different Pinus massoniana plantations were studied. [results] the number of culturable microorganisms in rhizosphere soil of two generations of Pinus massoniana plantations was compared with that of non-rhizosphere soil. The vertical distribution of enzyme activity in soil layer was obvious. They were the highest in the 0~10cm soil layer, the lowest in the 10~20cm soil layer and the lowest in the 20~30cm soil layer, and the number of culturable microorganisms and the enzyme activity of the second generation rhizosphere soil were higher than that of the first generation forest, compared with the same layer and different generations. There was no significant difference in soil urease activity between generations. The activity of other enzymes and the number of three kinds of microorganisms were significantly different between generations (p0.05), the number and activity of culturable microbes in rhizosphere of two generations of Pinus massoniana plantation were higher than that of non-rhizosphere, and with the deepening of soil layer, the number of culturable microorganism and enzyme activity of the two generations of Pinus massoniana plantation were higher than that of non-rhizosphere. There was no obvious correlation between rhizosphere and non-rhizosphere, and there was a positive correlation between soil enzyme and microorganism in two generations of Pinus massoniana forest (p0.01). [conclusion] continuous cultivation increased the number and enzyme activity of soil microorganism in Pinus massoniana forest rhizosphere. The soil properties of the rhizosphere of the second generation forest are better than that of the first generation forest in the vertical direction of soil layer.
【作者单位】： 贵州大学林学院;贵州省森林资源与环境研究中心;
【基金】：国家科技支撑课题(No.2015BAD09B01) 贵州大学研究生创新基金(No.研农2016015)
【分类号】：S714.3
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