桂南桉树人工林土壤肥力质量评价及限制因子诊断  

Soil Fertility Quality Evaluation and Limiting Factor Diagnosis ofEucalypt Plantations in Southern Guangxi

作　　者：兰俊 张明慧 付军 欧军 郭飞 杨春霞 杨章旗[2] Lan Jun;Zhang Minghui;Fu Jun;Ou Jun;Guo Fei;Yang Chunxia;Yang Zhangqi(Guangxi State-owned Paiyangshan Forest Farm,Ningming,Guangxi 532500,China;Guangxi Forestry Research Institute,Pinus Massoniana Engineering Technology Research Center of National Forestry and Grassland Administration,Guangxi Pinus Massoniana Research Center of Engineering Technology,Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning,Guangxi 530002,China)

机构地区：[1]广西壮族自治区国有派阳山林场,广西宁明532500 [2]广西壮族自治区林业科学研究院,国家林业和草原局马尾松工程技术研究中心,广西马尾松工程技术研究中心,广西优良用材林资源培育重点实验室,广西南宁530002

出　　处：《广西林业科学》2024年第4期421-429,共9页Guangxi Forestry Science

基　　金：广西科技基地和人才专项项目(桂科AD22036001);广西崇左市科技计划项目(崇科攻2022ZC1202);广西自筹经费林业科技项目(桂林科研[2022ZC]第81号,桂林科研[2022ZC]第82号)。

摘　　要：为给桉树(Eucalyptus spp.)人工林管理提供理论依据,基于15个土壤化学性质指标,采用主成分分析法构建最小数据集,计算土壤肥力质量综合指数,对桂南4个不同代次5种林龄尾叶桉(Eucalyptus urophylla)人工林土壤质量进行评价;采用限制因子诊断模型,筛选土壤限制因子。结果表明,桉树人工林土壤偏酸性。随桉树人工林代次和林龄变化,土壤有机质、全氮、全磷、全钾、水解氮、有效磷、速效钾、速效钙、速效镁、速效铁、速效锰、速效铜、速效锌和速效硼含量均变异大;土壤pH值变异小。土壤pH值及有机质、全氮、水解氮、有效磷、速效镁和速效硼含量可作为反映桉树人工林土壤肥力质量的最小数据集指标。不同代次和林龄桉树人工林土壤肥力质量好、较好、中等、较差和差等级占比分别为0%、5%、80%、15%和0%。土壤有机质、全氮、全钾、速效铁和速效硼含量是桂南桉树人工林土壤肥力质量的主要限制因子。建议重视有机和无机复合肥的施用,补充铁和硼等微量元素,根据不同代次和林龄实施相应的经营策略。In order to provide theoretical basis for management of eucalypt plantations,based on 15 soil chemical property indexes,minimum data set were established by principal component analysis.Integrated fertility indexes were calculated.Soil qualities of Eucalyptus urophylla plantations with four different generations and five stands ages were evaluated.Limiting factor diagnosis model was used to screen soil limiting factors.Results showed that soil pH in eucalypt plantations were acidic.Contents of soil organic matter,total nitrogen,total phosphorus,total potassium,hydrolyzable nitrogen,available phosphorus,available potassium,available calcium,available magnesium,available iron,available manganese,available copper,available zinc and available boron varied greatly with changes of generations and stand ages of eucalypt plantations,and soil pH varied little.Soil pH and contents of organic matter,total nitrogen,hydrolyzable nitrogen,available phosphorus,available magnesium and available boron could be used as minimum data set indexes to reflect soil fertility quality of eucalypt plantations.Proportions of very good,good,moderate,poor and very poor soil fertility qualities in eucalypt plantations with different generations and stand ages were 0%,5%,80%,15%and 0%respectively.Contents of organic matter,total nitrogen,total potassium,available iron and available boron were main limiting factors for soil fertility qualities of eucalypt plantations in southern Guangxi.It was suggested to pay attention to application of organic and inorganic compound fertilizers as well as supplement of trace elements such as iron andboron. Appropriate management strategies according to different generations and stand ages should be implemented.

关 键 词：土壤化学性质 最小数据集 土壤肥力质量 桉树人工林 

分 类 号：S792.39[农业科学—林木遗传育种]