栽培红花生长期土壤微生物与土壤理化因子动态

对红花（Carthamus tinctorius）生长期土壤微生物群落结构及其与土壤微环境营养元素、理化性质间的相关性进行了研究。结果表明，微生物总数表现为伸长期>种子成熟期>莲座期>花期；红花莲座期-伸长期放线菌、真菌数量均呈上升趋势，伸长期-花期细菌、真菌数量极显著（P<0.01）下降，花期-种子成熟期3种微生物类群数量（种植2年样地）再次呈现上升趋势。主成分分析和相关性分析结果显示，莲座期，速效磷、电导率共同影响微生物生长；伸长期，土壤营养元素含量是影响红花土壤微生物数量的关键因素；种子成熟期，影响因子变为有机质、土壤含水量、pH值，放线菌与有机质和速效磷存在负相关关系。试验表明，随着红花生长期的推进，其土壤微生物数量、土壤理化性质发生了变化。

Dynamics between soil microorganism and soil character actors during Carthamus tinctorius growth periods

An experiment was conducted to determine the soil microbial community structure and the relationship between soil microbial community and soil environment factors of Carthamus tinctorius field.The results of this study showed that the total number of microorganism showed as elongation stage>seed maturity stage>rosette stage>florescence stage.The fungi and actinomycete number increased from rosette stage to elongation stage,and the bacteria and fungi number significantly decreased from elongation stage to florescence stage(P<0.01),but increased from florescence stage to seed maturity stage.The Principal Component Analysis(PCA) with correlation analyses results showed that available phosphorus(AP) and electricity conductance(EC) together affected the growth of soil microbe community in the rosette stage,and available nitrogen(AN),AP,available potassium(AK) were the key factors impacting the number of soil microbes in elongation stage;the main factors affecting the growth of soil microbes were organic matter(OM),soil moisture(SM),and pH in the seed maturity stage.The Actinomycetes number was negatively related to OM and AP.This study suggested that the number of soil microbes varied with soil physicochemical property during the growth process of C.tinctorius.