杉木与红豆杉混交林土壤酶活性分析  

Analysis on Soil Enzyme Activities of Mixed Plantation of Cunninghamia lanceolata and Taxus wallichiana var.chinensis

作　　者：刘宏 卢宗军 陈代喜[2] 邓毅晖 李富洲 梁浩 Liu Hong;Lu Zongjun;Chen Daixi;Deng Yihui;Li Fuzhou;Liang Hao(Forestry Research Institute of Liuzhou,Liuzhou,Guangxi 545300,China;Guangxi Forestry Research Institute,Nanning,Guangxi 530002,China)

机构地区：[1]柳州市林业科学研究所,广西柳州545300 [2]广西壮族自治区林业科学研究院,广西南宁530002

出　　处：《广西林业科学》2021年第5期529-533,共5页Guangxi Forestry Science

摘　　要：调查“杉木(Cunninghamia lanceolata)×红豆杉(Taxus wallichiana var.chinensis)”近自然混交林和杉木纯林土壤中脲酶、多酚氧化酶、过氧化氢酶、酸性磷酸酶和纤维素酶的活性,分析不同林分中土壤酶活性的差异及其相互关系,为杉木混交林营建提供技术支撑。结果表明,纯林中的脲酶活性极显著高于混交林;混交林中的多酚氧化酶和酸性磷酸酶活性高于纯林。5种土壤酶活性重复内的变异系数均较小,重复间的变异系数相对较大,说明土壤酶活性的分布离散程度较大;过氧化氢酶活性重复间的变异系数较大,在混交林和纯林中分别为47.30%和69.33%。混交林中,脲酶活性与纤维素酶活性呈显著正相关;多酚氧化酶活性与过氧化氢酶活性和酸性磷酸酶活性均呈极显著正相关,与纤维素酶活性呈显著正相关;过氧化氢酶活性与酸性磷酸酶活性呈极显著正相关。纯林中,脲酶活性与多酚氧化酶活性呈显著正相关,与纤维素酶活性呈极显著负相关;多酚氧化酶活性与过氧化氢酶活性呈显著负相关,与纤维素酶活性呈极显著负相关。土壤酶之间的相互关系复杂,共同参与土壤生态系统中的物质循环过程。Activities of urease,polyphenol oxidase,catalase,acid phosphatase and cellulase in soils of near-nat⁃ural mixed plantation of Cunninghamia lanceolata and Taxus wallichiana var.chinensis and pure C.lanceolata plantation were investigated,and differences and correlations of soil enzyme activities in different stands were analyzed,which could provide technical support for construction of mixed plantation.Results showed that ure⁃ase activity in pure plantation was significantly higher than that in mixed plantation.Activities of polyphenol ox⁃idase and acid phosphatase in mixed plantation were higher than those in pure plantation.Variation coefficients within repeats in five soil enzyme activities were smaller and variation coefficients between repeats were larger,which showed that dispersion degree of soil enzyme activity distribution was large.Variation coefficients of cata⁃lase activity between repeats were larger,reaching 47.30%and 69.33%respectively in mixed and pure planta⁃tions.In mixed plantation,there was significantly positive correlation between urease activity and cellulase ac⁃tivity;polyphenol oxidase activity had extremely significant positive correlation with catalase activity and acid phosphatase activity,and had significantly positive correlation with cellulase activity;there was extremely sig⁃nificant positive correlation between catalase activity and acid phosphatase activity.In pure plantation,urease activity had significantly positive correlation with polyphenol oxidase activity,and had extremely significant negative correlation with cellulase activity;polyphenol oxidase activity had significantly negative correlation with catalase activity,and had extremely significant negative correlation with cellulase activity.Correlations among soil enzymes were complex,which jointly participated in material circulation of soil ecosystem.

关 键 词：土壤酶活性 杉木 红豆杉 混交林 

分 类 号：S714[农业科学—林学]