连翘根际微生物区系和土壤酶活性变化的研究  

Variation of Microbial Community and Enzyme Activity in Rhizospheric Soil of Forsythia suspense(Thunb.)

作　　者：魏志华[1] 程茂高[1] 介晓磊[1] 乔卿梅[1] 王新民[1] 

机构地区：[1]郑州牧业工程高等专科学校,河南郑州450011

出　　处：《北方园艺》2010年第6期12-14,共3页Northern Horticulture

基　　金：河南杰出青年科学基金资助项目(074100510018);国家第四十一批博士后科学基金资助项目(20070410616)

摘　　要：研究了2 a生和10 a生连翘根际土壤微生物和酶活性的变化规律。结果表明:随着连翘生长期的延长,其根际土壤中微生物总量呈增长趋势,其中细菌和真菌数量增长明显,放线菌呈下降趋势,所有土壤微生物中细菌数量均占优势;硝化细菌、氨化细菌、好气性纤维素分解菌、厌气性纤维素分解菌、厌气性固氮菌等重要有益微生物生理类群随连翘生长年限的延长而增强,而反硝化细菌和好气性固氮菌数量变化不明显;同时连翘生长能够显著增加根际土壤中过氧化氢酶、蔗糖酶、磷酸酶的活性,显著降低蛋白酶活性,而对多酚氧化酶和脲酶活性影响不明显。This paper studied the variations of microbes community and enzyme activity in Forsythia suspense （Thunb.） rhizosphere soil grown of 2 years or 10 years. The results showed that with the Forsythia suspense （Thunb.） growing development, the gross of microorganisms had an obvious increase; the number of fungi and bacteria had a distinct increase, while the aetinomycetes decreased. The number of bacteria in rhizosphere soil were dominated all the time. The number of nitrobacteria, ammonifier, aerobic cellulose decomposer, anaerobic cellulose decomposer and anaerobic azotobacter showed increase tendency with the Forsythia suspense （Thunb.） growing development. And the variation of number was not obvious of denitrifying bacteria and aerobic azotobacter. The enzyme activity of catalase, sucrase and phosphatase in rihzosphere showed increase tendency, while the variation of enzyme activity in protease was contrary. Polyphenol oxidase and urease were not obvious.

关 键 词：连翘 根际 微生物区系 酶活性 

分 类 号：S154.37[农业科学—土壤学] S567.9[农业科学—农业基础科学]