链霉菌702对水稻种子萌发、幼苗生长及土壤微生物的影响  

Effects of Streptomyces 702 on Seed Germination and Seedling Growth of Rice and Soil Microbes

作　　者：魏赛金[1,2] 王世强[2] 李昆太[2] 涂国全[2] 潘晓华[1] 

机构地区：[1]江西农业大学作物生理生态与遗传育种教育部重点实验室/江西省作物生理生态与遗传育种重点实验室,南昌330045 [2]江西农业大学生物科学与工程学院,南昌330045

出　　处：《农业环境科学学报》2014年第5期853-861,共9页Journal of Agro-Environment Science

基　　金：国家"十二五"科技支撑计划项目(2011BAD16B04;2012BAD14B14);国家自然科学基金项目(30960011)

摘　　要：土壤微生物及其代谢产物往往会对作物生长产生影响。以春光1号水稻为供试种子,链霉菌702及其代谢产物为供试菌和抗生素,通过盆栽试验研究链霉菌702及其代谢产物农抗702对水稻种子萌发、秧苗素质和土壤微生物区系影响。结果表明,低浓度农抗702促进水稻种子萌发、胚根和芽的生长,根系活力提高,但含糖量下降;种子中的淀粉酶活性、蛋白质含量随农抗702浓度的升高先升后降。施加链霉菌702菌剂后土壤细菌和霉菌数量均有所减少,放线菌数量增加,硝化细菌和亚硝化细菌减少,好气性纤维素分解菌增加,土壤微生物不同生理类群的变化,加速了土壤养分循环,增强了水稻的养分吸收,从而促进水稻生长。Soil microbes and their metabolites may influence crop growth. A pot experiment was conducted to investigate the effects of Streptomyces 702 and its metabolites（Ag-antibiotic 702） on seed germination and seedling growth of rice（Spring No. 1 ） and soil microbial flora. Seed germination and radicle and bud growth were improved under low concentrations of Ag-antibiotic 702. With increasing Ag-antibiotic 702 concentrations, amylase activity and protein contents increased at first and then decreased. In addition, root vigor was enhanced, while sugar contents were reduced by the Ag-antibiotic 702. Additions of Streptomyces 702 agent tended to decrease soil bacteria, mold, nitrobacteria and nitrifying bacteria, but significantly increased actinomycetes and aerobic cellulose decomposing bacteria,

关 键 词：链霉菌702 种子萌发 秧苗生长 微生物群落 

分 类 号：X172[环境科学与工程—环境科学]