Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (28): 48-53.doi: 10.11924/j.issn.1000-6850.casb2022-0768

Previous Articles     Next Articles

The Alleviating Effect of Microbial Fertilizer on Watermelon Continuous Cropping Obstacles

ZHU Shijun1(), WANG Lili1, JIN Shuquan1(), WANG Feng1, ZHOU Jinbo1, LU Xiaohong2   

  1. 1 Ningbo Academy of Agricultural Science/ Ningbo Key Laboratory of Testing and Control for Characteristic Agro-Product Quality and Safety, Ningbo, Zhejiang 315101
    2 Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193
  • Received:2022-09-07 Revised:2023-04-06 Online:2023-10-05 Published:2023-09-25


To clarify the effect of microbial inoculants on watermelon continuous cropping obstacles, 4 treatments including ordinary organic fertilizer+ inactivated microbial inoculants (CK), ordinary organic fertilizer+ microbial inoculants (T1), biological organic fertilizer+ inactivated microbial inoculants (T2), bio-organic fertilizer+ microbial inoculants (T3) were set, and the change of watermelon growth, yield and quality, and soil biological characteristics were tracked. The results showed that T3 could effectively promote the growth and development of watermelon. Compared with CK, the main vine length, stem thickness and chlorophyll of T3 increased by 18.04%, 17.21% and 20.09% from seedling stage to fruit expansion stage, respectively. T3 had a significant inhibitory effect on watermelon vine blight and Fusarium wilt, with protection effect of 12.81% and 9.32%, respectively. T3 increased the yield of each batch of watermelon fruits by 18.59% and 19.11%, respectively, and increased the soluble solids by 10.67% and 13.26%, and vitamin C by 6.42% and 5.32% comparing with CK. In addition, the microbial inoculum fertilizer was also conducive to improving the biological characteristics of the soil. Compared with the data before the test, activity of acid phosphate monoesterase, urease, catalaseby and sucrose of T3 treatment were increased by 6.65%, 9.61%, 3.23%, and 3.43%, respectively. Furthermore, the biomass of soil bacteria and actinomycetes were increased, and the biomass of fungi was reduced, the flora characteristics changed from “fungal type” to “bacterial type”. In summary, using bio-organic fertilizer as a base fertilizer and topdressing microbial inoculants could promote watermelon growth, increase watermelon yield and quality, inhibit soil-borne diseases, and improve soil biological characteristics, which has a positive effect on alleviating watermelon continuous cropping obstacles.

Key words: microbial fertilizer, watermelon, soil-borne diseases, continuous cropping obstacles, soil enzyme activity