广西林业科学2025，Vol.54Issue(4)：368-375,8.DOI:10.19692/j.issn.1006-1126.20250402
桂南不同林龄马尾松人工林土壤有机碳储量及其影响因素
Soil Organic Carbon Storages and Influencing Factors in Pinus massoniana Plantations of Different Stand Ages in Southern Guangxi
摘要
Abstract
In ordert to provide scientific basis for soil carbon sequestration management and multi-objective sustainable management of Pinus massoniana plantation,taking P.massoniana plantations of different stand ag-es(7-year-old,19-year-old,24-year-old,33-year-old,44-year-old and 66-year-old)in Guangxi state-owned Paiyangshan forest farm as research objects,distribution characteristics and influencing factors of soil or-ganic carbon content and carbon storage were analyzed.Results showed that there were significant differences in soil organic carbon content and carbon storage among P.massoniana plantations of different stand ages.Soil organic carbon content and carbon storage exhibited"W"shaped change trends with increase of stand age.In 0-40 cm soil layer,order of soil organic carbon content was 24-year-old(22.33 g/kg)>44-year-old(20.29 g/kg)>7-year-old(18.91 g/kg)>19-year-old(17.22 g/kg)>66-year-old(15.99 g/kg)>33-year-old(13.42 g/kg).Order of soil carbon storage was 24-year-old(128.12 t/hm2)>44-year-old(114.29 t/hm2)>7-year-old(105.81 t/hm2)>66-year-old(95.65 t/hm2)>19-year-old(88.80 t/hm2)>33-year-old(71.10 t/hm2).Soil organic carbon contents and carbon storages in 0-20 cm soil layers were significantly higher than those in 20-40 cm soil layers in P.massoniana plantations of different stand ages.Soil organic carbon content and carbon storage had significant positive correlations with soil total phosphorus content and extremely significant positive correlations with con-tents of soil total nitrogen,hydrolyzable nitrogen and available phosphorus as well as carbon content of litters.Soil organic carbon content had significant negative correlations with soil bulk density and pH.In silvicultural management,application of nitrogen and phosphorus fertilizers could promote growth and carbon accumulation of P.massoniana plantation.关键词
土壤有机碳/土壤碳储量/林龄/马尾松Key words
soil organic carbon/soil carbon storage/stand age/Pinus massoniana分类
林学引用本文复制引用
莫振世,杨章旗,李鹏,项栽芳,周怀勋,陈虎,郑明朝,黄晓霞,朱振文,韦鹏练..桂南不同林龄马尾松人工林土壤有机碳储量及其影响因素[J].广西林业科学,2025,54(4):368-375,8.基金项目
国家重点研发计划项目(2023YFD2200904) （2023YFD2200904）
国家重点研发计划项目子课题(2023YFF1304402-04) （2023YFF1304402-04）
广西自筹经费林业科技项目(桂林科研[2022ZC]第90号) （桂林科研[2022ZC]第90号）
