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,
出处
《农业环境科学学报》
CAS
CSCD
北大核心
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)
关键词
链霉菌702
种子萌发
秧苗生长
微生物群落
Streptomyces 702
seed germination
seedling growth
microbial community
