成都市龙泉山不同混交林类型对土壤磷组分的影响  

Effects of Different Mixed Forest Types on Phase of Soil Phosphorus Fraction in Chengdu Longquan Mountain

作　　者：曲别三约 骆晓[2] 樊戢 康雨诗 林润哲 刘梦丹 肖欢 周世兴[1] 黄从德[1] QUBIE Sanyue;LUO Xiao;FAN Ji;KANG Yushi;LIN Runzhe;LIU Mengdan;XIAO Huan;ZHOU Shixing;HUANG Congde(College of Forestry,Sichuan Agricultural University,Chengdu 611130,China;Sichuan Forestry Survey,Design and Research Institute Co.,Ltd.,Chengdu 610084,China)

机构地区：[1]四川农业大学林学院,成都611130 [2]四川省林业勘察设计研究院有限公司,成都610084

出　　处：《四川农业大学学报》2024年第2期414-421,共8页Journal of Sichuan Agricultural University

基　　金：世界银行贷款长江上游森林生态系统恢复项目科研课题项目子专题-多功能混交林营建技术研究与示范(510201202038467);四川省自然科学基金青年基金(2022NSFSC1134)。

摘　　要：【目的】旨在探究营建不同混交林类型对土壤磷组分的影响,为柏木人工林的可持续经营提供参考。【方法】以四川省成都市龙泉山上由抛荒地营建的香樟×乌桕混交林、栾树×香樟混交林、乌桕×柏木×龙爪槐混交林为研究对象,以柏木纯林为对照,测定了土壤磷组分含量(全磷、微生物磷、速效磷含量)及土壤理化性质,并分析不同混交林类型土壤磷组分含量和土壤理化性质的相关关系,探究影响土壤磷组分的主控因子。【结果】①3种混交林均显著提高了土壤微生物磷、速效磷和全磷的含量。在3种混交林中,香樟混交林提高土壤全磷和微生物磷含量的效果更显著;栾树混交林提高土壤速效磷和微生物磷含量的效果更显著。②3种混交林均提高了土壤有机碳、全氮含量与土壤总孔隙度,降低了土壤容重和pH。③冗余分析表明,土壤pH和土壤有机碳是影响土壤磷组分含量的主要因子,解释度分别为49.8%和27.6%。【结论】3种混交林总体上通过提高土壤有机碳含量和土壤pH来提高土壤全磷、微生物磷和速效磷含量。【Objective】This study aims to investigate the effects of various mixed forest types on soil phosphorus components and to provide insights for the sustainable management of Cupressus funebris plantations.【Method】In this study,three newly established mixed forests,namely,mixed forests of Cinna⁃momum camphora and Triadica sebifera,mixed forests of C.camphora and Koelreuteria paniculata,mixed forests of T.sebifera,C.funebris and Sophora japonica,along with pure forests of C.funebris,were selected as objects in Chengdu Longquan Mountain.We measured soil phosphorus fractions,including total phosphorus,microbial biomass phosphorus,available phosphorus,as well as soil physicochemical properties,and analyzed their relationships to explore the impact of forest types on soil phosphorus fractions and potential influencing factors.【Result】①Three types of mixed forests significantly increased the contents of soil microbial biomass phosphorus,available phosphorus,and total phosphorus.The contents of soil total phosphorus and microbial biomass phosphorus were higher in the mixed forest of C.cam⁃phora and T.sebifera compared to other forest types.However,the contents of soil available phosphorus and microbial biomass phosphorus were higher in mixed forest of K.paniculata and C.camphora than in other forest types.②Mixed forests increased the contents of soil organic carbon(SOC)and soil total nitrogen,as well as total soil porosity,while decreasing soil bulk density and soil pH.③Redundancy analysis revealed that soil pH and SOC were the primary factors influencing the soil phosphorus components,accounting for 49.8%and 27.6%of the variations in soil phosphorus components,respectively.【Conclusion】In the initial stage of establishing mixed forests of C.funebris,soil total phosphorus,microbial biomass phosphorus,and available phosphorus contents typically increase with SOC content and soil pH.

关 键 词：混交林 柏木纯林 土壤磷组分 冗余分析 

分 类 号：S725.2[农业科学—林木遗传育种]