桂西北土壤理化性质对桉树人工林生长的影响  

Effects of Soil Physical and Chemical Properties on Growth of Eucalyptus Plantation in Northwest Guangxi

作　　者：廖广寿 李建升 李就鹏 黄苗 杨梅[1] LIAO Guangshou;LI Jiansheng;LI Jiupeng;HUANG Miao;YANG Mei(Guangxi Colleges and Universities Key Laboratory for Cultivation and Utilization of Subtropical Forest Plantation,Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China,College of Forestry,Guangxi University,Nanning Guangxi 530004,P.R.China;Guangxi State-owned Qipo Forest Farm,Nanning Guangxi 530225,P.R.China)

机构地区：[1]广西大学林学院广西高校亚热带人工林培育与利用重点实验室/中南速生材繁育国家林业和草原局重点实验室,广西南宁530004 [2]广西壮族自治区国有七坡林场,广西南宁530225

出　　处：《西部林业科学》2024年第5期64-70,79,共8页Journal of West China Forestry Science

基　　金：广西林业科技项目“桉树人工(复层)林根系特征与养分利用机制”(2023GXZCLK25)。

摘　　要：以广西西北部地区河池市和百色市内6个分场的桉树人工林为研究对象,利用方差分析检验了不同林分不同土层(0~20,20~40 cm)的土壤理化性质和桉树生长差异特征,利用Pearson相关分析法和冗余分析法,探讨了土壤理化性质对桂西北桉树人工林生长影响。结果显示:(1)桂西北地区桉树人工林土壤主要呈酸性,0~20 cm土层的土壤自然含水率和养分含量普遍高于20~40 cm土层;(2)平胸分场和分水岭分场的桉树生长情况相对较好,其土壤自然含水率、有机质、全氮、全钾和铵态氮的养分含量高于其它分场;(3)桂西北地区桉树人工林土壤速效磷含量较低,全氮和有机质含量较为丰富;(4)相关性和冗余分析表明,土壤自然含水率和土壤养分对桉树生长具有较高的相关性,其中土壤含水率、有机质、速效磷、全氮和全钾的含量在一定程度上可以解释不同分场的桉树生长间的差异。研究结果表明:桂西北桉树的生长受土壤自然含水率、有机质、速效磷、全氮和全钾的含量影响最大。因此,为促进桂西北地区桉树的生长,提高林分生产力,可以施加有机肥和含磷量较高、氮和钾元素较为充足的无机肥。In this study,Eucalyptus plantations in six forest farms within Hechi and Baise cities in the Northwest Guangxi were used as research subjects.Soil physicochemical properties and Eucalyptus growth in different soil layers(0-20 cm and 20-40 cm)of different stands were examined using ANOVA,the effects of soil physicochemical properties on the growth of Eucalyptus plantations in Northwest Guangxi were explored using Pearson correlation analysis and redundancy analysis.The results showed that:(1)The soil of Eucalyptus plantations in Northwest Guangxi was mainly acidic,and the soil natural moisture content and nutrient content in 0-20 cm soil layer were generally higher than those in 20-40 cm soil layer.(2)The growth of Eucalyptus plantations in Pingxiong and Fenshuiling were better,and the natural moisture content,organic matter,total nitrogen,total potassium and ammonium nitrogen were higher than other sites.(3)The content of rapidly available phosphorus was lower,and the content of total nitrogen and organic matter was more in the soil of Eucalyptus plantations in Northwest Guangxi.(4)Correlation and redundancy analyses showed that soil natural moisture content and soil nutrients had a high correlation with Eucalyptus growth.Soil natural moisture content,the content of organic matter,rapidly available phosphorus,total nitrogen,and total potassium could explain to some differences between Eucalyptus growth in different forest farms.In summary,soil natural moisture content,the content of organic matter,rapidly available phosphorus,total nitrogen,and total potassium can most affect the growth of Eucalyptus in Northwest Guangxi.Therefore,in order to promote the growth and increase the productivity of Eucalyptus plantations in Northwest Guangxi,the organic fertilizers and inorganic fertilizers with higher phosphorus content and more adequate nitrogen and potassium elements can be added.

关 键 词：桉树人工林 生长 土壤理化性质 桂西北 

分 类 号：S714.5[农业科学—林学] S792.39