期刊论文

Control Factors of Soil Microbial Biomass Phosphorus in Stands of Chinese Fir Plantations With Different Ages in Huitong,Hunan Province

中文

水土保持研究

1005-3409

2019

26

1

260-265

10.13869/j.cnki.rswc.2019.01.038

国家林业公益性行业科研专项(201404316) 湖南省科技重点研发计划项目(农业支撑领域)(2015NK3025).

本校为其他机构

选取会同县不同林龄(3年生、8年生、18年生、26年生)杉木人工林为研究对象,测定其土壤全磷(TP)、有效磷(Bray 1-P)、微生物量磷(MB-P)、无机磷和有机磷组分,利用逐步回归分析和通径分析揭示各土壤磷素因子和理化因子对MB-P影响较大的优势因子。结果显示:(1)4种不同林龄杉木林土壤MB-P含量的平均值为6.90 mg/kg。TP和Bray 1-P含量的平均值分别为320.71 mg/kg,1.77 mg/kg,均属低水平。(2)不同龄林各因子对MB-P的影响:3年林,Bray 1-P, Al-P对MB-P的影响较大;8年林,N/P,LO-P、土壤含水率(W)、MRO-P对MB-P影响突出;18年林,Fe-P,N/P,Al- P,Bray 1-P对MB-P的作用明显;26年林,Fe-P,TP对MB-P的影响较大,C...

Changes in total P,Bray 1-P,microbial biomass P,inorganic P and organic P fractions in soils were investigated in four aged Chinese fir plantation forests(3,8,18 and 26-year-old stands)in Huitong,Hunan Province,China.Stepwise regression analysis and path analysis were used to reveal the dominant factors affecting soil microbial biomass P form phosphorus factors and soil physical and chemical properties.The results showed that:(1)the average value of the microbial biomass P content was 6.90 mg/kg in the four examined aged stands.the average concentrations of total P and Bray 1-P were 320.71 mg/...