寡聚糖生物农药对棉花体内细菌数量和作物生长的作用

通过常规分离方法，测定寡聚糖生物农药对中棉12品种的棉茎体内细菌群落数量的影响。2批实验结果表明喷寡聚糖后棉茎体内细菌群落数量均低于对照，喷寡聚糖10d后棉茎体内细菌群落数量显著下降(8.0×10

THE INFLUENCE OF OLIGOSACCHARIDES BIOCIDE ON BACTERIAL COLONY IN COTTON STEM AND THE EFFECTS ON GROWTH OF PLANTS

The influence of oligosaccharides biocide on bacterial colony in the stem of Chinese Cotton 12 was determined by routine separation mathod.The results of two groups experiments indicated that the number of bacterial colonies in the cotton stem,wtich were treated with the oligosaccharides,was lowerthan the control group;and it dropped significantly(8.0×107CFU/g)after treating 10 days,while the control group was 4.2×109CFU/g.This results illustrated that the oligosaccharides biocide could control the cotton damping-off,and as a equaled 0.05,the oriental difference was significant. The control effects were 70% at least when the oligosacchrides were diluted 150 or 300 times.Moreover,the oligosaccharides biocide had the effect of regulating growth.The results both in laboratory and in field indiated that the different concentration of the oligosaccarides could promote the primary growth of wheat,soybean,and rice;this effect was more significant at 50 μg/ml,the increasing yield ratio of soybean is 13.8%.