【摘要】 采用池栽方式,研究潮土3种不同质地土壤棉花花铃期根际微生物数量和酶活性及其与土壤理化性质的相关性。结果表明,在棉花-土壤质地-微生物相互作用的生态系统中,土壤微生物和酶活性受土壤质地和棉花生长发育二方面影响。相关分析显示,细菌、真菌是影响壤土中速效磷的主要微生物,磷酸酶是影响3种质地中速效磷、碱解氮及砂土中速效钾的主要酶。细菌、真菌、磷酸酶可作为评判棉花根际土壤肥力的生物学指标。更多还原

【Abstract】 A pool-culture experiment was carried out by cultivating cotton in sandy,loamy and clayey texture of Chao soil,and studied on the variation features of rhizosphere microorganisms and enzyme activities of cotton during the flowering and boll-forming stage and their correlation with nutrients of the soils.The results indicated that the number of rhizosphere microorganisms and enzyme activities were affected by both the soil texture and development of cotton in the interaction system of the cotton,soil texture and microorganisms.Correlation analysis showed that bacteria and fungi were the most important microorganisms affecting soil available P.Phosphatase was the most important enzyme affecting soil available P and alkali-hydrolyzable N in defferent soil textures,and available K in loam.It indicated that bacteria fungi and Phosphatase can be used as the biological indices of soil fertilization properties at the cotton rhizosphere.更多还原