一分快三_一分快三平台_首页
Long-term fertilization regimes influence FAME profiles of microbial communities in an arable sandy loam soil in Northern China

Shixue Zheng, Junli Hu, Xuefei Jiang, Fengqin Ji, Jiabao Zhang, Ziniu Yu, Xiangui Lin

tSoil samples collected from a long-term (19-year) experimental field with seven treatments wereanalyzed for fatty acids methyl esters (FAMEs) to determine fertilization regime effects on microbialcommunity structure in sandy loam soils. The amounts of FAMEs in bacteria, actinomycetes, and fungiwere highest with the two organic manure (OM)-fertilized treatments (OM and 1/2 OMN – half OM plushalf mineral fertilizer), lowest with the NK treatment, and fell in the middle levels with three mineral P-fertilized treatments (NPK, NP and PK) and the control with no fertilizer (CK), with the exception of fungiwhich showed no significant difference among the five treatments without OM fertilization. Principalcomponent analysis of FAME patterns indicated that NPK was not significantly different from CK, but thetwo manure-containing treatments and the P-deficiency treatment (NK) were significantly different fromCK and NPK. Redundancy analysis plot showed that FAME amounts significantly correlated to soil organicC and total N contents, while soil available P and total P contents, which were greatly decreased by the NKtreatment, also had positive and substantial effects on soil microbial FAMEs. The results demonstratedthe importance of P fertilization as well as organic manure in maintaining soil microbial biomass andimpacting community structure.



Designed By Alex