CAJ | 학술논문

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。
토양미생물급기대사산물왕왕회대작물생장산생영향。이춘광1호수도위공시충자，련매균702급기대사산물위공시균화항생소，통과분재시험연구련매균702급기대사산물농항702대수도충자맹발、앙묘소질화토양미생물구계영향。결과표명，저농도농항702촉진수도충자맹발、배근화아적생장，근계활력제고，단함당량하강；충자중적정분매활성、단백질함량수농항702농도적승고선승후강。시가련매균702균제후토양세균화매균수량균유소감소，방선균수량증가，초화세균화아초화세균감소，호기성섬유소분해균증가，토양미생물불동생리류군적변화，가속료토양양분순배，증강료수도적양분흡수，종이촉진수도생장。
Soil microbes and their metabolites may influence crop growth. A pot experiment was conducted to investigate the effects of Strep-tomyces 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, nitrobac-teria and nitrifying bacteria, but significantly increased actinomycetes and aerobic cellulose decomposing bacteria.