防风根际微生物区系和土壤酶活性的变化研究  

Variation of microbial community and enzyme activity in rhizospheric soil of Saposhnicovia divaricata (Turz) Schisck

作　　者：程茂高[1] 乔卿梅[1] 王新民[1] 韦小敏[1] 

机构地区：[1]郑州牧业工程高等专科学校药物工程系,河南郑州450011

出　　处：《广东农业科学》2009年第12期81-83,共3页Guangdong Agricultural Sciences

基　　金：河南省杰出青年科学基金(074100510018);国家博士后科学基金(20070410616);河南省科技攻关项(0624070034)

摘　　要：研究了1年生和2年生防风根际土壤微生物区系和酶活性的变化规律。结果表明:随着防风生长年限的延长,其根际土壤中微生物总量有所降低,根际土壤细菌和真菌显著降低,放线菌略有升高,原有的细菌种群优势逐渐被放线菌所替代;反硝化细菌、氨化细菌、厌气性纤维素分解菌、好气性固氮菌、厌气性固氮菌等呈增长趋势,其中2年生防风根际土壤的反硝化细菌、氨化细菌和好气性固氮菌数量分别是对照土未种植防风地块土壤的5.77倍、9.01倍、14.13倍,硝化细菌数量显著减少,好气性纤维素分解菌数量先增后减、总体锐减;过氧化氢酶、多酚氧化酶、蔗糖酶、脲酶活性降低,蛋白酶和磷酸酶活性先急剧上升后缓慢降低。This paper studied the variations of microbes community and enzyme activity in Saposhnicovia divaricata （Turz） Schisck rhizosphere soil grown for one or tow years. The results showed that with increasing year of cropping, the gross of microorganisms had decreased, and the number of fungi, bacteria had a slight decrease, while the actinomycetes increased. The predominant species of bacteria gave place to actinomycetes. The number of denitrifying bacteria, ammonifier, anaerobic cellulose decomposition microbes, aerobic nitrogen-fixing bacteria, anaerobic nitrogen-fixing bacteria showed increase tendency, and the number of denitrifying bacteria, ammonifier, aerobic nitrogen-fixing bacteria were 577% ,901% ,1413% to CK. the number of nitrobacteria had a slight decrease, aerobic cellulose decomposer had a slowly increase in one year and a dramatic decrease in tow years.The enzyme activity of catatase, polyphenol oxidase,sucrase and urease in rihzosphere showed decrease tendency, while the activity of protease and phosphatase had a dramatic increase in one year and a slowly decrease in tow years.

关 键 词：防风 根际 微生物区系 土壤酶活性 

分 类 号：S154.37[农业科学—土壤学]