从根际微生物的角度研究了硅酸盐细菌对植物生长的促进作用。代谢产物对植物生长促进作用最好的是 1 38#菌 ,处理 5 0天 ,水稻株高比对照增加 2 7.7% ,生物量比对照增加 40 .2 % ,硅酸盐细菌的代谢产物对植物生长的刺激作用与浓度有关 ,低浓度的代谢产物对植物生长有明显的促进作用 ,高浓度的代谢产物则有一定的抑制作用 ,代谢产物的作用对根系生长的影响尤为明显 The effect of silicate bacteria on plant growth was studied from the perspective of rhizosphere microorganisms. Metabolites had the best effect on plant growth. When treated with 50 days, the plant height of rice increased by 2 7.7% and the biomass increased by 40.2% compared with the control. The metabolites of silicate bacteria had no significant effect on plant The stimulating effect of growth is related to the concentration. The metabolites of low concentration promote the plant growth obviously, and the metabolites of high concentration have some inhibitory effect, and the effect of metabolites on the growth of the root is obvious