2 株贝莱斯芽孢杆菌在上海葡萄上的应用.

To explore the effects of two strains of Bacillus spp. combined with organic fertilizer on the growth and fruit of sunshine rose, and to further expand the application range of microbial fertilizer on grapes. In November 2020, two strains of Bacillus velezensis YH-18 and B. velezensis YH-20 were applied to the sunshine rose grapes planted in Fengxian District of Shanghai. Two kinds of microbial liquid inoculants were applied to the grape planting soil, diluted and mixed according to the ratio of bacterial liquid : water = 1 : 2, and then poured into the pesticide applicator. The bacterial liquid was directly sprayed on the applied organic fertilizer in the garden by spraying, and the soil was covered in time after application. In March 2021, the in situ reapplication was carried out.30 days after the first application, the chlorophyll content of grape leaves in the YH-18 and YH-20 treatment groups increased by 10.12% and 3.26% compared with the control; the leaf thickness increased by 22.16% and 10.80% compared with the control; the leaf area increased by 23.92% and 19.87% compared with the control. After two times of application, the ear weight ratio of grapes in the YH-18 and YH-20 treatment groups increased by 19.55% and 16.19% compared with the control; the longitudinal diameter of single fruit increased by 3.15% and 3.76% compared with the control; the fruit shape index was improved. The soluble solids content of grapes in the YH-18 and YH-20 treatment groups increased by 22.08% and 13.58% compared with the control; the titratable acid content of grapes in the YH-18 treatment group increased by 21.05% compared with the control;the water content of grapes decreased by 2.18% and 1.96% compared with the control;the hardness of grapes in the YH-18 treatment group increased by 20.9% compared with the control. The application of YH-18 and YH-20 microbial inoculants on the basis of organic fertilizer in the garden significantly improved the growth of grapes and improved the quality of fruits, which is suitable for widespread promotion in grape plantations. [ABSTRACT FROM AUTHOR]