| 秦岭西部不同发育阶段油松和日本落叶松人工林土壤酶活性变化和分布特征 |
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| 引用本文： | 陈琦,尹粉粉,曹靖,鲁海燕,张宋智.秦岭西部不同发育阶段油松和日本落叶松人工林土壤酶活性变化和分布特征[J].生态与农村环境学报,2010,26(5). |
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| 作者姓名： | 陈琦 尹粉粉 曹靖 鲁海燕 张宋智 |
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| 作者单位： | 1. 兰州大学生命科学学院干旱与草地生态教育部重点实验室,甘肃兰州,730000
2. 小陇山林业科学研究所,甘肃天水,741022 |
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| 基金项目： | 国家自然科学基金，国家基础科学人才培养基金，甘肃省自然科学基金 |
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| 摘 要： | 以秦岭西部小陇山沙坝林业试验基地为研究点,采用野外调查采样和室内分析相结合的方法,比较了不同发育阶段油松(Pinus tabulaeformis)和日本落叶松(Larix kaempferi)人工林林下凋落物分解层(H层)和表土层(A层)理化性质及酶活性的变化。结果表明,2种林型林下凋落物分解层各项土壤理化性质及酶活性指标均明显高于相应表土层。随着林龄的增加,除了土壤纤维素酶活性按幼龄林→中龄林→近熟林呈先升高后降低的变化趋势外,土壤荧光素二乙酸酯水解酶(FDA水解酶)、脱氢酶、蛋白酶、脲酶、酸性磷酸酶活性,以及有机质、全氮、有效氮、全磷、有效磷含量随林分的发育总体呈现先降低后升高的变化特征。从幼龄林到近熟林的发育过程中,日本落叶松林下各项土壤理化性质及酶活性指标变化波动性比油松大,说明日本落叶松的引进在一定程度上影响了土壤生物化学过程的强度和方向。除土壤脲酶与pH值之间以及酸性磷酶酸与速效氮之间以外,6种土壤酶活性与土壤pH值,有机质、全氮、速效氮、速效磷含量之间均呈在α=0.05或α=0.01水平上相关显著。
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| 关 键 词： | 油松 日本落叶松 土壤酶活性 秦岭西部 发育阶段 |
Variation and Spatial Characteristics of Soil Enzyme Activities in Pinus tabulaeformis and Larix kaempferi Plantation at Different Development Stages in Western Qinling Mountains |
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| CHEN Qi,YIN Fen-fen,CAO Jing,LU Hai yan,ZHANG Song-zhi.Variation and Spatial Characteristics of Soil Enzyme Activities in Pinus tabulaeformis and Larix kaempferi Plantation at Different Development Stages in Western Qinling Mountains[J].Journal of Ecology and Rural Environment,2010,26(5). |
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| Authors: | CHEN Qi YIN Fen-fen CAO Jing LU Hai yan ZHANG Song-zhi |
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| Institution: | CHEN Qi1,YIN Fen-fen1,CAO Jing1,LU Hai-yan1,ZHANG Song-zhi2(1.Key Laboratory of Arid and Grassland Ecology of Ministry of Education,School of Life Science,Lanzhou University,Lanzhou 730000,China,2.Xiaolongshan Research Institute of Forestry,Tianshui 741022,China) |
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| Abstract: | At the Shaba Forest Experimental Station located in Xiaolongshan Mountain in the west of the Qinling Mountains,a study was carried out to compare differences in soil physicochemical properties and soil enzyme activity in the litter decomposing layer(H-horizon) and topsoil(A-horizon) between Pinus tabulaeformis and Larix kaempferi plantation stands at different development stages,by means of field investigation and laboratory analysis.Results show that all related indices were higher in the litter decomposin... |
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| Keywords: | Pinus tabulaeformis Larix kaempferi soil enzyme activity western Qinling development stage |
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