CAJ | 학술논문

采用磷脂脂肪酸谱图分析法研究针叶林、针阔混交林和阔叶林3种林地土壤不同土层的微生物区系差异性,结果表明:供试的3种覆被类型林地土壤微生物、细菌、真菌和放线菌相对生物量均随土壤深度的增加而极显著或显著减少,以针阔混交林和阔叶林土壤的垂直差异较为显著;土壤各类细菌相对生物量也均随土壤深度的增加而减少.林地土壤微生物区系均以细菌占绝对优势,其次是真菌,分别占土壤微生物总生物量的69.92%-77.08%和20.64%-30.01%;细菌则以假单胞细菌为主,占细菌总生物量的26.80%-38.38%.针阔混交林0-20 cm和20-40 cm土壤微生物和细菌相对生物量均极显著大于阔叶林和针叶林;针阔混交林和针叶林土壤真菌相对生物量均显著大于阔叶林.针阔混交林0-20 cm土壤细菌多样性大于阔叶林和针叶林,而针阔混交林和阔叶林20-40 cm土壤细菌多样性则大于针叶林.
채용린지지방산보도분석법연구침협림、침활혼교림화활협림3충임지토양불동토층적미생물구계차이성,결과표명:공시적3충복피류형임지토양미생물、세균、진균화방선균상대생물량균수토양심도적증가이겁현저혹현저감소,이침활혼교림화활협림토양적수직차이교위현저;토양각류세균상대생물량야균수토양심도적증가이감소.임지토양미생물구계균이세균점절대우세,기차시진균,분별점토양미생물총생물량적69.92%-77.08%화20.64%-30.01%;세균칙이가단포세균위주,점세균총생물량적26.80%-38.38%.침활혼교림0-20 cm화20-40 cm토양미생물화세균상대생물량균겁현저대우활협림화침협림;침활혼교림화침협림토양진균상대생물량균현저대우활협림.침활혼교림0-20 cm토양세균다양성대우활협림화침협림,이침활혼교림화활협림20-40 cm토양세균다양성칙대우침협림.
Micro-flora differences in various soil layers covered with coniferous, coniferous-broadleaf mingled and broadleaf forest were studied by phospholipids fatty acid spectrum analysis. The results showed that the relative biomass of total microorganisms, bacteria, fungus and actinomycetes in the forestry soils decreased significantly or remarkably with the increase of soil depth, and the vertical differences of the biomass were much significant in the soils covered with coniferous-broadleaf mingled and broadleaf forest. The bacteria and fungus, whose biomasses were 69.92% -77.08% and 20.64% -30.01% of total microorganism respectively, were dominative and secondary micro-flora in the forestry soils, and the biomass of pseudomonas was 26.80% -38.38% of total bacteria, were main species of soil bacteria, which showed distinct characteristics of soil micro-flora in subtropical area. The relative biomasses of total microorganisms and bacteria in both 0-20 cm and 20 - 40 cm layers covered with coniferous-broadleaf mingled forest were significantly higher than those covered with coniferous and broadleaf forest, and those of fungus in two layers covered with coniferous-broadleaf mingled and coniferous forest were remarkably higher than those covered with broadleaf forest. The bacteria diversities in 0 -20 cm layer covered with coniferous-broadleaf mingled forest were higher than those covered with broadleaf and coniferous forest, and those in 20 -40 cm layer covered with coniferous-broadleaf mingled and broadleaf forest were higher than those covered with coniferous forest.