【摘要】 在广东省不同地区,按不同土地利用类型（如自然林地、果园、水田、旱地、荒地等）以及不同土壤类型取样进行土壤微生物数量和土壤养分状况分析。结果发现,从三大类微生物总数的平均状况来看,广东省大部分土壤微生物总数可达1.0×10⁶个·g^-1干土以上;不同地区土壤微生物总数存在一定差异,从平均状况来看,潮汕地区(7.77×10⁶个·g^-1干土)>湛江地区(1.6×10⁶个·g^-1干土)>广州地区(1.35×10⁶个·g^-1干土);不同土地利用方式下微生物数量也存在着一定差异,具体表现为:林地>菜地>稻田>果园>作物旱地>荒地,土壤微生物总量与土壤肥力状况密切相关。从土壤类型来看,砖红壤、赤红壤微生物数量较低。从总体上看,广东省大部分土壤微生物数量处于较低水平。更多还原

【Abstract】 According to different land use systems（forest land,cropland,orchard land,rice field and bare land）and different soil types,soil samples were obtained in different regions of Guangdong Province,and amount of microbes,including bacteria,fungi and actinomyces,and soil nutrients were analyzed.The experimental data showed that there was a positive relationship between soil microbial population and soil fertility status,and the total amount of microbes was 1.0×10⁶ ind·g^-1dry soil or more in most soils of Guangdong province.Differences of soil microbial amount were found in different areas,soil microbial amount in east region(the number of Chaoshan region is 7.77×10⁶ ind·g^-1dry soil)were higher than those in west region(the number of Zhanjiang region is 1.6×10⁶ ind.·g^-1dry soil),it was lowest in Guangzhou area(the number is 1.35×10⁶ ind.·g^-1dry soil).There also was difference of soil microbial amounts among different land use systems,i.e.total microbial amounts from high to low were in forest land> vegetable planting land>rice farmland>orchard land>dry cropland>bare land.The microbial biodiversity had a decreasing trend in most soils of Guangdong province.更多还原