Effects of different microbial agents on the disease prevention effect and yield of beetroot rot
[Objective]explore the control effect of microbial agents on beetroot rot and its impact on yield.[Methods]Six microbial agents were selected,namely Trichoderma(M),Bacillus subtilis(B),Tri-choderma plus Bacillus subtilis(C),Pseudomonas fluorescentis(P),Purpuria purpuris(D),and Bacillus polymyxoplasmos(PP),to carry out experimental research on the field prevention and control of beetroot rot.[Results]The results showed that the incidence and disease index of beetroot rot were significantly reduced compared with the control(CK)(P<0.05),the incidence rate was reduced by 18.18%-50.00%,the dis-ease index was reduced by 2.27-5.87,the prevention effect of each treatment reached 19.12%-49.45%,and the prevention effect was C>D>B>P>M>PP.The application of microbial agents could improve the physicochemical properties of the rhizosphere soil of beets,among which M,B,C,D treatment couldincrease the content of soil organic matter,and 6 microbial agents could significantly increase the content of available nitrogen,available phosphorus and available potassium.The application of microbial agents could increase the accumulation of aboveground,underground and total dry matter of beet,the yield and sugar content of beetroot were higher than those of the control,the sugar production rate increases by 7.43%to 38.05%,and the sugar production of D,C and M was the most significant(P<0.05),with an increase of 38.05%,28.49%and 19.78%.[Conclusion]The results of soil nutrient and beet yield determination shows that the application of fungal agents can activate soil nutrients,and the control effect of Trichoderma + Bacillus subtilis is better,which is better than that of Trichoderma and Bacillus,which increases the content of organic matter and quick-acting nutrients in the rhizosphere soil,and at the same time increases the accumulation of aboveground,underground and total dry matter of beets,and the yield and sugar content of beetroot are higher than those of the control,and the sugar yield increases by 7.43%-38.05%.It can be seen that microbial agents can im-prove the physical and chemical properties of crop rhizosphere soil,increase the content of organic matter,al-kaline nitrogen,available phosphorus and available potassium in the soil,promote crop nutrient absorption and growth,thus increasing the crop yield.
beetroot rotmicrobial agentsprevention and control effectsyield
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维普
