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以乌鲁木齐河源区不同海拔表层土壤样品为研究材料,利用荧光显微计数技术、寡营养恢复培养技术等,研究了微生物的数量与土壤理化参数和植被类型的关联度.结果表明:表层土壤中可培养细菌数与表土含水量、总C、总N和pH值相关性不显著,与相应的植被类型明显相关,可培养细菌数从大到小所对应的植被为:苔草>嵩草>芨芨草>针阔叶混交林>云杉>车前草>山莓草;在相同植被类型下,可培养细菌数量表现出随海拔升高而降低的趋势.植被类型是影响土壤可培养细菌数量的主要因素,但海拔变化对可培养细菌数量的影响也不可忽略.
Taking surface soil samples from different altitudes in the Heyuan area of Urumqi as the research materials, the correlation between the quantity of microorganisms and the soil physical and chemical parameters and vegetation types was studied by using the fluorescence microscopy and the techniques of oligotrophic restoration and culture, etc. The results showed that: There was no significant correlation between the number of bacteria cultured and the water content of topsoil, total C, total N and pH value, which was significantly correlated with the corresponding vegetation types. The corresponding cultivable count of bacteria could be as follows: Carex> Kobresia> > Coniferous and broad-leaved mixed forest> Picea> Plantago> raspberry grass. Under the same vegetation type, the number of culturable bacteria showed a trend of decreasing with elevation.The vegetation type was the main factor that affected the quantity of soil culturable bacteria Factors, but the impact of changes in altitude on the number of cultivable bacteria can not be ignored.