A Study on Distribution Patterns of Soil Microorganisms in Refuse Dumps on Heidaigou Open Cut Coal Mine
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NETL
NSTL
维普
万方数据
利用稀释平板法对黑岱沟煤矿排土场不同恢复植被下的土壤微生物群落的数量、组成和分布进行了研究.结果表明:(Ⅰ)各恢复地土壤中微生物总数均低于未破坏土壤(原土),最高仅为原土的52.9%.(2)在0～30 cm范围内,原土微生物总数变化为:10～20 cm＞0～10 cm ＞20 ～30cm,而各恢复地中微生物总数在0～30 cm范围内,随土壤垂直深度的加深而降低.(3)各样地土壤微生物数均是细菌＞放线菌＞真菌.(4)不同植被恢复土壤中细菌数量变化趋势与微生物总数变化趋势基本相同,即原土＞沙棘+山杏+沙枣恢复地＞果树恢复地＞火炬树恢复地＞沙棘恢复地,不同植被各垂直深度土样放线菌和真菌无一致的变化趋势.(5)不同垂直深度土壤微生物数量分布与植物群落类型等有关.
By use of dilution plate counting method,a study has been made on the quantities, distribution patterns and compositions of soil microorganisms in different restored vegetation of refuse dumps on Heidaigou Open Cut Coal Mine. Results show that; (1) the total quantity of soil microorganisms in the resumed field is lower than that in the original undisturbed soil, and the maximum quantity reaches only 52.9% of that in the o-riginal soil; (2) within the depth of 0 ~30 cm,the total quantity of microorganisms in original soil decreases by order of 10 - 20 cm > 0 - 10 cm > 20 ～ 30 cm, while, with the increase of vertical depth of the resumed field, the total quantity decreases accordingly; (3) among different soil microorganism groups, the numbers of microorganisms all display the order that the number of bacteria > the number of actinomycetes > the number of fungi; (4) in resumed fields with different vegetation, the change pattern of the number of bacteria in the soil is generally similar to that of the total number of microorganisms, namely:that in original soil > in sea -buckthorn + armeniaca ansu + elaeagnus resumed field > in fruit tree resumed field > in torch tree resumed field > in sea - buckthorn resumed field, while the change pattern of the number of actinomycetes and fungi in different depth of different vegetation doesnt show the same trend; (5) the distribution of soil microorganism quantity in different vertical depth is associated with types of plant community.
NETL
NSTL
维普
万方数据
