应用生态学报2024，Vol.35Issue(6)：1492-1500,9.DOI:10.13287/j.1001-9332.202406.018
南亚热带人工林树种配置对根际土壤生物有效磷的影响
Effects of tree species assembly on bioavailable P components in rhizosphere soil of southern subtropical plantation
摘要
Abstract
Improving the availability of soil phosphorus(P)and promoting tree growth through tree species selec-tion and assembly are the critical issue.We conducted an afforestation experiment following randomized block experimental design with 1,2,4,and 6 tree species richness in south subtropics,including Pinus massoniana,Mytilaria laosensis,Erythrophleum fordii,Castanopsis hystrix,Michelia macclurei,Manglietia glauca,Aquilaria sinensis,and Dalbergia odorifera.We measured the bioavailable P components(CaCl2-P,citrate-P,enzyme-P and HCl-P)and examined the effects of different tree species assembly on bioavailable P components and tree growth.The results showed that,compared with non-nitrogen-fixing tree species,the mixing of nitrogen-fixing tree species(E.fordii and D.odorifera)effectively increased the contents of soil water,total nitrogen,total phosphorus,and microbial biomass P(MBP).The assembly of specific tree species improved the accumulation of bioavailable P.Mixing of nitrogen-fixing tree species significantly increased CaCl2-P content by 46.2％to 160.3％,the enzyme-P content produced by microbial mineralization by 69.3％to 688.2％,and HCl-P by 31.5％to 81.3％,increased MBP by 81.8％to 149.4％,and microbial biomass N(MBN)by 88.1％to 160.6％,respectively.Redundancy and correlation analysis results showed that MBP,available P,total phosphorus,L-leucine aminopeptidase,cellobiose,acid phosphatase,MBN and soil organic carbon were key factors driving the variation of rhizosphere soil bioavail-able P.Mixing of nitrogen-fixing tree species increased enzyme-P and citrate-P,and the availability of which were positively correlated to tree basal area.In this study,mixing of nitrogen-fixing tree species increased the rhizosphere soil bioavailable P content,which facilitates tree growth.关键词
南亚热带/人工林/生物有效磷/树种配置/林分生长Key words
south subtropics/plantation/bioavailable P/tree species assembly/stand growth引用本文复制引用
李金凤,王晖,尤业明,王健,童秀丽,胡佳佳,明安刚,陈琳,刘世荣..南亚热带人工林树种配置对根际土壤生物有效磷的影响[J].应用生态学报,2024,35(6):1492-1500,9.基金项目
本文由国家自然科学基金项目(31930078)、国家重点研发计划项目(2021YFD2200402)和中国林业科学研究院基本科研业务费项目(CAFYBB2021ZW001)资助. （31930078）
