生态学杂志2011，Vol.30Issue(10)：2203,1.
连作对浙贝母生长及土壤性质的影响
Impacts of continuous cropping on Fritillaria thunbergii Miq.growth and rhizosphere soil properties
摘要
Abstract
A field experiment was conducted to study the growth of Fritillaria thunbergii Miq. And the physicochemical properties, microbial flora, and enzyme activities of rhizosphere soil under 1 -, 2-, and 4-year cropping, aimed to reveal the possible mechanisms of continuous cropping obstacle of F. Thunbergii. With the increasing duration of continuous cropping, the contents of soil available N, P, and K decreased significantly while that of soil organic matter increased, soil pH presented a decreasing trend, the total amount of soil microbes and the amounts of soil bacteria and actinomycetes decreased linearly whereas the amount of soil fungi had a linear increase, and the activities of soil urease and catalase decreased but those of soil polyhenol oxidase and saccharase were in adverse. Under continuous cropping, the F. Thunbergii membrane lipid perox-idation accelerated, SOD and POD activities decreased, and the plant biomass as well as the root length and root surface area decreased significantly. It was suggested that the continuous cropping obstacle of F. Thunbergii was possibly caused by the nutrient deficiency, acidification, alteration of microbial flora, and oxidative stress in rhizosphere soil.关键词
浙贝母/连作障碍/土壤理化性质/微生物区系/土壤酶Key words
Fritillaria thunbergii Miq./continuous cropping obstacle/soil physicochemical properties/microbial flora/soil enzyme分类
农业科技引用本文复制引用
廖海兵,李云霞,邵晶晶,方芳,郭卫东,陈文荣..连作对浙贝母生长及土壤性质的影响[J].生态学杂志,2011,30(10):2203,1.基金项目
浙江省公益技术项目(2011C22052)资助. （2011C22052）
