白银市东西大沟土壤理化性质与微生物数量的关系

The Relationship between Physical and Chemical Properties of Soil and Microbial Quantity in the West and East Grooves of Baiyin City

[目的]研究白银市东、西大沟土壤理化性质与微生物数量的关系。[方法]以白银市2条主要排污沟为研究对象,分析了东、西大沟土壤理化性质、微生物数量。[结果]东大沟土壤全N、全P含量显著高于西大沟,pH均值显著低于西大沟,而细菌、真菌数量显著低于西大沟,放线菌差异不显著,全N、全P均值比西大沟分别高100.00%和117.89%。西大沟N、P、pH与细菌、放线菌均呈负相关,N、P、pH与真菌呈正相关,东大沟N、P、pH与细菌分别呈正相关、负相关、负相关,N、P、pH与放线菌分别呈负相关、负相关、正相关,N、P、pH与真菌均呈负相关。多元回归线性分析表明,对东大沟真菌影响较大的是全N含量,其次是pH,且均呈显著负相关,相关系数为0.999;对东、西大沟其余微生物有影响,但不显著。[结论]该研究为更好地理解重金属污染、解决农田灌溉污水水质提供参考。

[Objective]To study the relationship between physical and chemical properties of soil and microbial quantity in the west and east grooves of Baiyin City.[Method]This paper made a study of two main refuge sewage grooves in Baiyin City and analyzed physical and chemical properties of soil in the west and east grooves.[Result]The amount of total nitrogen and total phosphorus of the east groove was much higher than that of the west groove while its pH was apparently lower than the west groove.The quantity of bacteria and fungi were much less than the west groove and the differences of actinomycetes in the west and the east grooves were not significant.The average values of total nitrogen and total phosphorus in the east groove was higher than the west groove as a result of100.00%and117.89%.In the west groove,nitrogen,phosphorus,and pH were negatively correlated with bacteria and actinomycetes,nitrogen,phosphorus,and pH were positively correlated with fungi.In the east groove,nitrogen,phosphorus,and pH respectively had a positive correlation,a negative correlation and a negative correlation with bacteria,then they respectively had a negative correlation,a negative correlation,and a positive correlation with actinomycetes.Nitrogen,phosphorus,and pH of the east groove and fungi were negatively correlated.The results of multiple regression demonstrated that total nitrogen affected fungi in the east groove most,the next one was pH,and they all negatively correlated to fungi with a correlation index of0.999,which had a non-significant impact on microbe in the west and the east groove.[Conclusion]Studying the correlation between soil physical and chemical properties and microbe quantity in the west and east grooves makes people provide advice to understand heavy metal pollution and solve the water quality problems of sewage irrigation in farmland better.