中文摘要：

为了得到有益于灰枣生长发育的优势菌种,通过田间试验,研究了灰枣根际促生复合菌株P13K7、P13K24和单一功能菌株P13、P15、K7、K24以及对照（CK）7个处理对灰枣根际土壤养分和微生物数量的影响。应用主成分分析法,将8个指标（p H值、有机质含量、碱解氮含量、速效磷含量、速效钾含量、细菌数量、放线菌数量和真菌数量）简化成2个主成分,2个主成分所提供的信息量占全部信息量的90.78%。结果表明：与对照相比,施用PGPR能够改善灰枣土壤养分和提高微生物总量。经过土壤指标的综合分析得出,复合菌株P13K24的应用效果最好。

英文摘要：

In order to obtain superiority strains good for gray jujube growth and development, through a field test, the effects of combination bacteria （P13K7 and P13K24）, single function bacteria （P13, P15, K7, K24） and the control （CK） on nutrients and microbial quantity in Ziaiphus jujuba cv. Huizao rhizosphere soil were researched. Eight indexes were simplified into two principal components using the method of principal component analysis, including soil pH value, organic matter content, alkali-hydrolyzable nitrogen content, rapid available phosphorus content, rapid available potassium content, bacteria quantity, actinomycetes quantity and fungi quantity. Information amount contained in the two principal components accounted for 90.78%of total information amount. The results showed that：compared with the control, application of PGPR could improve soil nutrients and microbial quantity. The combination bacteria P13K24 had the best application effect according to the comprehensive evaluation results of the soil indexes.