四川米仓山水青冈原生林与杉木人工林土壤酶化学计量特征  

Soil Enzyme Stoichiometric Characteristics of Fagus Primary Forest and Cunninghamia lanceolata Plantation in Micangshan,Sichuan

作　　者：刘泉位 张天国 杜娟 尹清孝 汪倪宇 孙伟 吴伯武 向伟 陈亚梅 胥晓[3] LIU Quan-wei;ZHANG Tian-guo;DU Juan;YIN Qing-xiao;WANG Ni-yu;SUN Wei;WU Bo-wu;XIANG Wei;CHEN Ya-mei;XU Xiao(Micangshan Nature Reserve Affairs center,Guangyuan Sichuan 628200,China;Wangcang County State-owned Forest Farm,Guangyuan Sichuan 628200,China;College of Life Science,China West Normal University,Nanchong Sichuan 637009,China)

机构地区：[1]旺苍县米仓山自然保护区事务中心,四川广元628200 [2]旺苍县国有林场,四川广元628200 [3]西华师范大学生命科学学院,四川南充637009

出　　处：《西华师范大学学报(自然科学版)》2025年第2期111-118,共8页Journal of China West Normal University(Natural Sciences)

基　　金：西华师范大学基本科研业务项目(20A005);四川米仓山自然保护区大样地建设(一期)项目(2020)。

摘　　要：为了研究水青冈(Fagus)原生林与杉木(Cunninghamia lanceolata)人工林土壤酶活性及酶化学计量比的差异和驱动因素,以四川米仓山国家级自然保护区内水青冈原生林与杉木人工林作为研究对象,测定了土壤理化性质,与碳、氮、磷获取相关的7种土壤酶活性及酶化学计量特征,分析了土壤理化性质与土壤酶活性及其化学计量特征的相关性,探究了水青冈原生林与杉木人工林土壤微生物养分限制因素的差异性。结果表明:(1)水青冈原生林土壤中全碳、全氮、全磷、速效磷、溶解性氮含量、土壤酸性磷酸酶、β-1,4-葡萄糖苷酶、β-1,4-N-乙酰葡糖胺糖苷酶、纤维二糖水解酶、亮氨酸氨基肽酶、过氧化物酶和多酚氧化酶酶活性均高于杉木人工林。(2)这些土壤酶活性与土壤理化性质具有显著的正相关性。(3)水青冈原生林与杉木人工林中的C∶N∶P分别是1.00∶0.95∶1.46和1.00∶1.03∶1.54,向量角度为杉木人工林显著高于水青冈原生林且均大于45°,这表明两者土壤微生物生长可能均受到P元素的限制,且杉木人工林受限制程度更高。与水青冈原生林相比,杉木人工林的土壤养分含量更低,且微生物受P元素限制的程度也更强,因此在利用杉木进行生态修复的同时,也应该注重限制元素(如P元素)的补充。To research the distinctions and their driving factors of soil enzyme activities and their stoichiometric ratio between the primary Fagus forest and the Cunninghamia lanceolata plantation in Micangshan Nature Reserve,Sichuan,the soil physicochemical properties,and the 7 types of soil enzyme activities and their enzyme stoichiometric characteristics,related to carbon,nitrogen and phosphorus acquisition,were determined in the primary Fagus forest and the C.lanceolata plantation.Besides,the correlations between the soil physicochemical properties,soil enzyme activities and their stoichiometric characteristics were analyzed,and the differences in limiting factors of soil microbial nutrients between these two forest types were also explored.The results show that:(1)The content of total carbon,total nitrogen,total phosphorus,available phosphorus,dissolved nitrogen and the activities of acid phosphatase,β-1,4-glucosidase,β-1,4-N-acetylglucosaminidase,cellobiohydrolase,leucine aminopeptidase,peroxidase,and polyphenol oxidase in soil of the primary Fagus forest are higher than those in the C.lanceolata plantation.(2)There are highly positive correlations between these enzyme activities and soil physicochemical properties.(3)The ratios of C∶N∶P are 1∶0.95∶1.46 and 1∶1.03∶1.54 in the primary Fagus forest and the C.lanceolata plantation respectively,and the vector angles of both are greater than 45°.In addition,the vector angles in the C.lanceolata plantation are significantly higher than those in the primary Fagus forest,suggesting that the growth of soil microorganisms in both may be restricted by P element,and the degree of restriction is higher in plantations.To sum up,compared with the primary Fagus forest,there is a decrease of soil nutrient contents in the C.lanceolata plantation,and the degree of restriction by P element to soil microorganisms is stronger.Therefore,when using Chinese fir for ecological restoration,we should also pay attention to the supplement of limiting elements(such as P element).

关 键 词：水青冈 杉木 土壤酶 酶化学计量比 土壤养分 

分 类 号：S153.6[农业科学—土壤学]