杜尚嘉 吴海霞 陈国德 符溶 陈彧



摘要以五指山次生林群落为研究对象,探究次生林群落土壤养分特征在不同演替阶段(幼龄林、中龄林、成熟林、过熟林)的变化规律及其土壤肥力质量。结果表明:随着次生林正向演替的进程,土壤 pH呈现先上升后下降的趋势,而土壤有机质、全磷含量均呈现先下降后上升的趋势,土壤全钾含量呈逐渐上升趋势;土壤有机质含量与 pH为极显著负相关,土壤有机质含量与全氮、全磷均为极显著正相关;次生林群落不同演替阶段土壤养分综合得分排序:幼龄林>成熟林>过熟林>中龄林。
关键词五指山市;次生林群落;土壤养分;分布特征;肥力质量
中图分类号 S714.8 文献标识码 A DOI:10.12008/j.issn.1009-2196.2021.12.004
Soil Nutrient Characteristics and Fertility Quality Evaluation of Secondary Forest Communities in Wuzhishan
DU Shangjia1) WU Haixia1) CHEN Guode1) FU Rong1) CHEN Yu1 ,2)
[1 Hainan Academy of Forestry, Haikou, Hainan 571100, China;
2 Hainan Academician Workstation (Forestry), Haikou, Hainan 571100, China]
Abstract The soil samples in the secondary forest communities of Wuzhishan Mountains at different forest succession stages (young, middle-aged, mature and over-mature) were collected by using quadrat approach to analyze their changes in soil nutrient characteristics and their soil fertility quality. The results showed that with the process of positive succession of the secondary forests the soil pH increased first and then decreased, while the contents of soil organic matter and total phosphorus decreased first and then increased, and that the content of soil total potassium increased gradually. The content of soil organic matter is significantly negatively correlated with pH, and the content of soil organic matter is positively correlated with the contents of total nitrogen and total phosphorus. The comprehensive scores of soil nutrients in the secondary forest communities at different forest succession stages are in the order of young forest > mature forest > over-mature forest > middle-aged forest.
Keywords Wuzhishan city ; secondary forest community ; soil nutrients ; distribution characteristics ; fertility quality
土壤是森林生態系统中最基本的资源,同时也是生态系统中不可再生的资源。土壤作为森林存在和发展的物质基础,不仅为植物生长供应和协调养分、水分、空气和热量,还是生态系统中物质和能量交换的重要参与者和载体[1-3]。土壤养分是由土壤提供的植物生长所必须的营养元素,是林木生长发育所必须的物质基础及易于被调节的因子。研究土壤养分动态变化规律,有助于进一步掌握土壤肥力的调控原理与技术,土壤肥力质量评价是依据土壤资源调查及对土壤的要求,针对土壤的利用价值和存在潜力进行评估[4],此二者都对防止森林土壤退化、维持土地的可持续利用具有重大意义,并且为寻找合适的森林经营方式提供科学参考和理论依据。此前已有大量……