桂北石灰岩区域桉树人工林土壤肥力评价——以国有维都林场为例  

Evaluation of Soil Fertility Quality in Eucalyptus Plantations in the Limestone Region of Northern Guangxi-A Case Study of Weidu Forest Farm

作　　者：湛年勇 黄斌 黄严龙航 江海涛 唐健[1] 杨瑞青 ZHAN Nianyong;HUANG Bin;HUANG Yanlonghang;JIANG Haitao;TANG Jian;YANG Ruiqing(Guangxi Academy of Forestry/Guangxi Laboratory of Forestry,Nanning 530002,China;State-Owned Weidu Forest Farm,Laibin 546199,China;Guangxi Huawo te Group Co.,Ltd.,Nanning 530034,China)

机构地区：[1]广西壮族自治区林业科学研究院/广西林业实验室,广西南宁530002 [2]广西壮族自治区国有维都林场,广西来宾546199 [3]广西华沃特集团股份有限公司,广西南宁530034

出　　处：《乡村科技》2025年第7期116-121,共6页Rural Science and Technology

基　　金：广西自然科学基金项目(2022GXNSFBA035630);广西自筹经费林业科技项目(2023GXZCLK62);广西自筹经费林业科技项目(2023GXZCLK57);广西林科院研究团队项目(2024RT13)。

摘　　要：以广西壮族自治区国有维都林场为例,对桂北石灰岩区域桉树人工林土壤肥力进行了系统评价。通过采集不同土层(0~20 cm和20~40 cm)的土壤样品,测定了土壤pH值、有机质质量分数、全氮质量分数、全磷质量分数、全钾质量分数、速效养分质量分数及中微量金属元素质量分数等化学性质指标。利用主成分分析法筛选出了影响土壤肥力的关键指标,构建了最小数据集,并基于内梅罗指数法对不同土层的土壤肥力进行了评价。研究结果表明,不同土层深度下的土壤肥力存在显著差异;0~20 cm土层土壤肥力较高,有机质含量丰富,氮、磷、钾等营养元素含量适中,肥力等级评价为“较好”;而20~40 cm土层土壤肥力相对较低,肥力等级评价为“中等”。针对桂北石灰岩区域桉树人工林土壤肥力下降的问题,提出了相应的改良措施,旨在为区域生态可持续发展提供科学依据。This study systematically evaluated the soil fertility quality of Eucalyptus plantations in the limestone region of northern Guangxi,taking Weidu Forest Farm as an example.Soil samples were collected from different soil layers(0~20 cm and 20~40 cm),and chemical properties such as soil pH,organic matter content,total nitrogen,total phosphorus,total potassium,available nutrients,and trace metal elements were determined.Principal component analysis(PCA)was used to select key indicators influencing soil fertility,and a minimum dataset(MDS)was constructed.The soil fertility quality of different soil layers was evaluated using the Nemerow index method.The results showed that there were significant differences in soil fertility quality between different soil layers.The 0~20 cm soil layer exhibited higher soil fertility quality,with abundant organic matter content and moderate levels of nitrogen,phosphorus,and potassium nutrients,and was evaluated as having"good"fertility.In contrast,the 20~40 cm soil layer had relatively lower soil fertility quality,and was evaluated as having"moderate"fertility.In response to the issue of declining soil fertility in Eucalyptus plantations in the limestone region of northern Guangxi,this study proposed corresponding improvement measures aimed at providing a scientific basis for regional sustainable ecological development.

关 键 词：桉树人工林 土壤肥力 森林培育 养分管理 有机质 

分 类 号：S714.8[农业科学—林学]