不同林龄肉桂人工林土壤养分状况及肥力评价  

Soil Nutrient Status and Fertility Evaluation of Cinnamomum cassia Plantations atDifferent Stand Ages

作　　者：覃其云[1] 张帅 贝荣趣 唐健[1] 莫大旺 王会利[1] Qin Qiyun;Zhang Shuai;Bei Rongqu;Tang Jian;Mo Dawang;Wang Huili(Guangxi Forestry Research Institute,Key Laboratory of National Forestry and Grassalnd Administration on Cultivation of Fast-Growing Timber in Central South China,Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning,Guangxi 530002,China;Wuzhou Forestry Technology Extending Station,Wuzhou,Guangxi 543002,China;Wuzhou Forestry Research Institute,Wuzhou,Guangxi 543100,China)

机构地区：[1]广西壮族自治区林业科学研究院,中南速生材繁育国家林业和草原局重点实验室,广西优良用材林资源培育重点实验室,广西南宁530002 [2]梧州市林业技术推广站,广西梧州543002 [3]梧州市林业科学研究所,广西梧州543100

出　　处：《广西林业科学》2023年第6期733-738,共6页Guangxi Forestry Science

基　　金：广西科技计划项目(桂科AD20297118);中央引导地方科技发展资金项目(桂科ZY21195026)。

摘　　要：为了解桂东地区不同林龄肉桂(Cinnamomum cassia)人工林土壤养分状况,为肉桂主产区土壤养分管理和科学施肥提供科学依据,以9个不同林龄肉桂人工林为试验对象,采用全国第二次土壤普查养分分级标准和灰色关联分析法对土壤养分状况和土壤肥力进行评价。结果表明,不同林龄肉桂人工林的土壤均呈酸性或强酸性,全磷、有效磷、交换性钙、交换性镁和有效硼含量均处于极贫乏水平,速效钾、交换性锰含量均处于贫乏水平;有机质和全氮含量均处于中等水平;全钾和有效铜含量均处于中等偏下水平;有效锌含量处于中等偏上水平;碱解氮和有效铁含量均处于富或极富水平。土壤肥力关联度为0.395~0.671,平均值为0.527,土壤肥力总体属于Ⅳ级(差)水平。3个样点土壤肥力属于Ⅲ级(一般)水平,5个样点土壤肥力属于Ⅳ级(差)水平,1个样点土壤肥力属于Ⅴ级(极差)水平。土壤有机质、全氮、有效磷、有效硼和速效钾是影响肉桂人工林土壤肥力的主要因素。In other to understand soil nutrient status of Cinnamomum cassia plantations at different stand ages in eastern Guangxi and provide scientific basis for soil nutrient management and scientific fertilization in main C.cassia producing areas,taking nine C.cassia plantations as experimental objects,second national soil survey nutrient grading standard and grey correlation analysis method were used for soil nutrient status analysis and comprehensive evaluation of soil fertility.Results showed that soils of C.cassia plantations at different stand ag-es were acidic or strongly acidic.Contents of total P,available P,exchangeable Ca,exchangeable Mg and avail-able B were at extremely poor levels.Contents of available K,exchangeable Mn were at poor levels.Contents of organic matter and total N were at middle levels.Contents of total K and available Cu were at below middle lev-els.Content of available Zn was at above middle level.Contents of alkali-hydrolyzed N and available Fe were at rich or extremely rich levels.Correlation degrees of soil fertility were 0.395~0.671 with average value of 0.527.Soil fertility generally belonged to GradeⅣ(poor).Soil fertilities of 3 sample points belonged to GradeⅢ(general),5 sample points belonged to GradeⅣ(poor),and 1 sample plot belonged to GradeⅤ(extremely poor).Organic matter,total N,available P,available B and available K were main factors affecting soil fertility.

关 键 词：土壤养分 肥力评价 灰色关联度 肉桂 

分 类 号：S714.8[农业科学—林学]