摘要
为了了解农田栽培人参对土壤微生物群落结构的影响,采用磷脂脂肪酸法(PLFA)测定了1、2、3、4、5年生农田栽参根区土壤微生物量的活性部分,分析了群落结构的变化。结果表明:农田栽培人参根区土壤以i15∶0,a15∶0,16∶1ω9c,16∶0等4种PLFAs占有优势地位;农田栽参根区土壤微生物总量和细菌生物量具有相同的降低趋势,均低于对照,且2年生降低的幅度最明显;真菌生物量和放线菌生物量具有相同的增加趋势,与对照相比均有增加,但增加的比率相差明显,真菌增加的幅度明显,接近10倍,放线菌虽有增加,但幅度微弱。真菌占总生物量的比率迅猛增加,是农田栽参土壤微生物群落结构变化的主要特征。
In order to study the effects of cultivating ginseng in farmland on soil microbial community structures,active microbial mass and community structure in rhizosphere of ginseng of 1,2,3,4 and 5 years old were determined by phosphor lipid fatty acid（PLFA）.The results showed the microorganisms containing the PLFA of i15∶0,a15∶0,16∶1ω9c and 16∶0 were dominance in microbial community in farmland root zone soil cultivating ginseng.Bacterial biomass and total biomass were decreased significantly,and total biomass was more declined at 2 years old.Fungal biomass were enhanced significantly and raised by 10 times,while actinomycete biomass increased slightly.In the community structure,fungi ratio in total biomass were enhanced compared with the control,which was key characters of soil microbial community structure in farmland cultivated ginseng.
出处
《吉林农业科学》
CSCD
2010年第6期32-36,共5页
Journal of Jilin Agricultural Sciences
基金
国家科技支撑计划子课题(2007BAI38B01)
吉林省科技发展计划(20090573)
关键词
农田栽培人参
土壤微生物群落结构
磷脂脂肪酸
Cultivating ginseng in farmland
Soil microbial community structure
Phosphor lipid fatty acid
