广西林业科学2025，Vol.54Issue(4)：376-383,8.DOI:10.19692/j.issn.1006-1126.20250403
桉树与木荷混交林碳储量与土壤养分特征研究
Study on Carbon Storage and Soil Nutrient Characteristics of Eucalypt×Schima superba Mixed Plantation
摘要
Abstract
In order to select suitable mixed models for ecological restorations of eucalypt pure plantations,tak-ing eucalypt×Schima superba mixed plantation and eucalypt pure plantation as research objects,soil physical and chemical properties and carbon(C)storages in tree layer and soil layer were measured,and stoichiometric characteristics of soil C,nitrogen(N)and phosphorus(P)were analyzed.Results showed that in eucalypt×S.su-perba mixed plantation,average DBH,average tree height,average individual volume and average individual carbon content of eucalypts were significantly higher than those in eucalypt pure plantation.Accumulation per unit area and carbon storage per unit area of eucalypt×S.superba mixed plantation were significantly lower than those of eucalypt pure plantation.In eucalypt pure and eucalypt×S.superba mixed plantations,soil bulk densi-ties,pH,soil organic carbon(SOC)contents,total nitrogen(TN)contents,total phosphorus(TP)contents,total potassium(TK)contents,C∶N,C∶P and N∶P as well as soil carbon storages in 0-20 cm soil layers were higher than those in 20-40 cm layers.In 0-20,20-40 and 0-40 cm soil layers,eucalypt×S.superba mixed plantation had higher contents of SOC,TN and TK as well as C∶P and N∶P than eucalypt pure plantation,and eucalypt pure plantation had higher soil bulk density,pH,TP content,C∶N and soil carbon storage than eucalypt×S.su-perba mixed plantation.Soil carbon storages were significantly higher than tree layer carbon storages in both eu-calypt pure and eucalypt×S.superba mixed plantations.Tree layer carbon storage and total carbon storage in eu-calypt×S.superba mixed plantation were significantly lower than those in eucalypt pure plantation.Various cor-relations were found among soil physical and chemical properties.Compared with eucalypt pure plantation,eu-calypt×S.superba mixed plantation exhibited higher soil organic matter mineralization rate and lower phospho-rus availability,and nitrogen limitation was partially mitigated in soil.Soil porosity and overall nutrient status were improved in eucalypt×S.superba mixed plantation,which was beneficial for restoration of soil fertility.关键词
碳储量/土壤养分/生态化学计量特征/桉树×木荷混交林Key words
carbon storage/soil nutrient/ecological stoichiometric characteristic/eucalypt×Schima superba mixed plantation分类
农业科技引用本文复制引用
王仁杰,廖维建,李典云,肖啸,张志娟,梁惠子,杜玉敏,王光梅,戴凌,王勇..桉树与木荷混交林碳储量与土壤养分特征研究[J].广西林业科学,2025,54(4):376-383,8.基金项目
广西优良用材林资源培育重点实验室自主课题(2024-A-03-02) （2024-A-03-02）
广西林科院研究团队项目(2024RT07) （2024RT07）
广西自筹经费林业科技项目(桂林科研[2022ZC]第18号) （桂林科研[2022ZC]第18号）
