广西林业科学2025，Vol.54Issue(2)：151-159,9.DOI:10.19692/j.issn.1006-1126.20250204
桉树及其混交林土壤团聚体碳、氮和磷化学计量特征
Stoichiometric Characteristics of C,N and P in Soil Aggregates of Eucalypt Plantation and Its Mixed Plantations
摘要
Abstract
In order to provide scientific basis for optimizing management models and improving soil quality of eucalypt plantation,taking 10-year-old eucalypt-Dalbergia odorifera mixed plantation,eucalypt plantation and eucalypt-Castanopsis hystrix mixed plantation as research objects,distributions of soil aggregates,contents of soil organic carbon(SOC),total nitrogen(TN)and total phosphorus(TP)as well as stoichiometric characteris-tics in 0-20 and 20-40 cm soil layers were analyzed.Results showed that in 0-20 and 20-40 cm soil layers,contents of SOC,TN and TP in whole soils were significantly higher in eucalypt-D.odorifera and eucalypt-C.hystrix mixed plantations than those in eucalypt plantation.In eucalypt plantation as well as eucalypt-D.odor-ifera and eucalypt-C.hystrix mixed plantations,soil aggregates with>0.25 mm particle size accounted for high-er proportions.SOC contents in soil aggregates with>2 and 1-2 mm particle sizes were overall higher than those in soil aggregates with<0.25 mm particle size,while TN contents were higher in soil aggregates with 0.25-<1 and<0.25 mm particle sizes.TP content was relatively evenly distributed in soil aggregates with differ-ent particle sizes.Contents of SOC,TN and TP in order of were eucalypt-D.odorifera mixed plantation>euca-lypt-C.hystrix mixed plantation>eucalypt plantation.Soils in eucalypt plantation as well as eucalypt-D.odor-ifera and eucalypt-C.hystrix mixed plantations all exhibited rapid carbon decomposition and mineralization rates,low phosphorus availability and nitrogen limitation.Eucalypt-D.odorifera mixed plantation significantly enhanced contents of SOC,TN and TP and promoted formation of soil aggregates with>2 mm particle size.关键词
土壤团聚体/碳、氮和磷化学计量特征/桉树/混交林Key words
soil aggregate/stoichiometric charateristic of C,N and P/eucalypt/mixed plantation分类
农业科技引用本文复制引用
牛青茂,崔宇鸿,廖子华,卢泉羽,陈秋烨,郭苗,叶绍明..桉树及其混交林土壤团聚体碳、氮和磷化学计量特征[J].广西林业科学,2025,54(2):151-159,9.基金项目
广西自筹经费林业科技项目(2023GXZCLK09) （2023GXZCLK09）
中央财政林业科技推广示范项目(2022TG26号) （2022TG26号）
