不同林龄紫果云杉林土壤碳氮磷化学计量特征研究  

The Study of the Stoichiometric Characteristics of Soil Carbon,Nitrogen and Phosphorus in Picea Purpurea Forests of Different Ages

作　　者：汤桂迎 韩富忠 李强峰[1] 宋维秀[1] 周华坤[3] 史正晨 Tang Guiying;Han Fuzhong;Li Qiangfeng;Song Weixiu;Zhou Huakun;Shi Zhengchen(College of Agriculture and Animal Husbandry,Qinghai University,Xining 810016,China;Maixiu Forestry Farm of Huangnan Prefecture,Huangnan 811401,China;Key Laboratory of Restoration Ecology in Cold Regions of Qinghai Province,Northwest Plateau Institute of Biology,Chinese Academy of Sciences,Xining 810008,China;University of Chinese Academy of Sciences,Beijing 100049,China;Qinghai Normal University,Xining 810016,China)

机构地区：[1]青海大学农牧学院,西宁810016 [2]黄南州麦秀林场,黄南811401 [3]中国科学院西北高原生物研究所,青海省寒区恢复生态学重点实验室,西宁810008 [4]中国科学院大学,北京100049 [5]青海师范大学,西宁810016

出　　处：《青海科技》2024年第4期46-52,共7页Qinghai Science and Technology

基　　金：青海省麦秀林区天然林监测项目(2023-2027年)实施方案(第一期2023年);青海省麦秀林区青海云杉林抚育经营和人工林近自然经营技术研究项目(2023—2027年);黄南州牧光储一体光伏园区生态监测评价项目;黄南藏族自治州生物多样性本底调查与研究项目。

摘　　要：为探究紫果云杉不同生长发育阶段的土壤有机碳、全氮、全磷的质量分数及生态化学计量特征的影响,以青海省黄南州麦秀林场40年生、90年生、140年生紫果云杉天然林为研究对象,采用五点法采集0~10、> 10~20、> 20~30 cm的土壤样品,测定三种林龄和三个土层深度的土壤有机碳(C)、全氮(N)、全磷(P)质量分数,并计算化学计量比。研究结果表明,林龄和土层深度对土壤有机碳、全氮、全磷有显著影响(P <0.01),对碳磷比和氮磷比有显著影响(P <0.01),对碳氮比无显著影响(P> 0.05)。土壤有机碳是影响土壤碳磷比变化的重要因素,土壤氮是影响土壤氮磷比变化的重要因素。In order to investigate the effects of soil organic carbon(C),total nitrogen(N)and total phosphorus(P)mass fractions and ecological stoichiometric characteristics in different growth and development stages of Picea purpurea,soil samples from 0-10cm,>10-20cm,and>20-30cm in Maixiu Forest Farm,Huangnan Prefecture were collected to determine the mass fractions of soil organic carbon(C),total nitrogen(N),and total phosphorus(P)across the three forest ages and at various soil depths,and calculate the corresponding stoichiometric ratios,with the use of the five-spot sampling method.The results showed that forest age and soil depth significantly influenced the concentrations of soil organic carbon(C),total nitrogen(N)and total phosphorus(P)(P<0.01),and also significantly affected the stoichiometric ratios of carbon to phosphorus and nitrogen to phosphorus(N∶P)ratio(P<0.01),and there was no significant impact on the carbon to nitrogen(C∶N)ratio(P>0.05).Soil organic carbon significantly influenced the C∶P ratio,and soil nitrogen significantly influenced the N∶P ratio.

关 键 词：紫果云杉 生态化学计量 碳氮磷 林龄 

分 类 号：S714.2[农业科学—林学] S791.18