热带亚热带植物学报2026，Vol.34Issue(3)：245-254,10.DOI:10.11926/jtsb.5012
间伐强度对华南2种近自然改造人工林土壤养分释放的影响
Influence of Thinning Intensity on Soil Nutrient Release in Two Near-nature Plantations in South China
摘要
Abstract
To assess the impact of thinning intensity on soil nutrient release characteristics,the Daling Mountain Forest Farm in Dongguan City,Guangdong Province was selected as the study area.Soil carbon(C),nitrogen(N),and phosphorus(P)contents,as well as the extracellular enzyme activities related to N and P nutrient acquisition,were measured in 13-to 17-year-old Acacia mangium and Eucalyptus urophylla plantations that had undergone near-natural transformation(thinning+planting native tree species)under three thinning intensities(no thinning,30%thinning,and 60%-70%thinning).The results showed that compared with the unthinned plots,the available N and P contents in the thinned plots of A.mangium increased by an average of 28%and 71%,respectively,and those in the thinned plots of E.urophylla increased by an average of 21%and 33%,respectively.The activities of soil C,N,and P acquisition enzymes in both thinned plots decreased to varying degrees.By comparing the stoichiometric ratios and vector characteristics of ecological enzymes under the two thinning intensities,it was indicated that thinning could effectively alleviate the C limitation required for nutrient transformation,but excessive thinning might further lead to soil N limitation.It was suggested that moderate thinning(30%)could balance the release of N and P nutrients in the soil and the improvement of vegetation diversity in both plantations,and should be the optimal choice for thinning intensity in the near-natural transformation of these two forest types.关键词
土壤养分/间伐强度/近自然改造/生态酶化学计量/人工林Key words
Soil nutrient/Thinning intensity/Near-nature transformation/Ecoenzymatic stoichiometry/Plantation引用本文复制引用
严朝东,张东旭,苏纯兰,秦晓霖,潘丽禅,刘卫,练琚愉,曹洪麟..间伐强度对华南2种近自然改造人工林土壤养分释放的影响[J].热带亚热带植物学报,2026,34(3):245-254,10.基金项目
东莞市社会发展科技项目(20231800938582) （20231800938582）
东莞市财政预算项目(441900210000000273742)资助 This work was supported by the Project for Social Development Science and Technology in Dongguan(Grant No.20231800938582),and the Project of Dongguan Fiscal Budget(Grant No.441900210000000273742). （441900210000000273742）
