Abstract Taking Trichodema viride-spent mushroom substrate(SMS)fermentation product as experimental material,this paper studied the effects of combining it with peat,vermiculite by different ratio(V/V) on promoting cucumber seedling growth and controlling efficiency on cucumber root rot.The results
showed that the physiological and chemical properties of treatment T7( Trichodema viride-SMS fermentation product∶peat∶vermiculite = 1∶1∶1),T9(Trichodema viride-SMS fermentation product∶peat∶vermiculite =2∶1∶1)and T11(Trichodema viride-SMS fermentation product∶peat∶vermiculite = 1∶2∶1)were very near that of the contrast(Trichodema viride-SMS fermentation product∶peat∶vermiculite=0∶2∶1).Thirty days after inoculation of Fusarium solani,the control efficiency of T7,T9 and T11 treatments on cucumber root rot were 88.56%,78.34%,82.31%,respectively,and were all significantly higher than that of the contrast thiophanate-methyl.In the experiment of nurturing cucumber seedlings,the mixed substrate T7 had the best
performance in terms of plant height,steam diameter,leaf area,chlorophyll content,number of lateral roots,above-ground and underground dry matter weights,root system activities,etc.Their indexes were 117%,127%,171%,99.4%,170%,189%,237% and 125% of the contrast,respectively.Therefore,taking Trichodema viride-SMS fermentation product for cucumber seedling culture had not only good efficiency on stimulating cucumber seedling growth but also better control effect on cucumber root rot.
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