花生连作田土壤微生物群落动态与土壤养分关系研究

Relation of Microbial Population Dynamics and Nutrient in Soil of Continuous Cropping with Peanut

对不同连作年限花生田土壤中的微生物群落和养分进行了分析,结果表明,随着花生连作年限的增加,土壤及花生根际土壤中的真菌数量明显增加,细菌数量明显减少;根际与非根际土壤的R/S值随连作年限的增加而降低;连作1年后碱解氮含量变化达显著水平,土壤中速效磷和速效钾的含量与细菌数量呈极显著的正相关关系。

This paper analyzed the microbial populations and nutrients in soil of continuous cropping with peanut. The results showed that with the increase in years of continuous cropping, fungi quantity increase, the number of bacteria count decreased obviously, and the R/S of microbe in soil of rhizosphere and bulk reduced. The hydrolysable N, as measured after one year of continuous cropping, exhibited a significant change. The contents of rapidly available K and P in soil, was found significantly positively related to the number of bacteria.