Effects of different microbial inoculants on the prevention and control of potato continuous cropping diseases

FENG Kunrong; HAN Xiunan; ZHANG Binbin; LI Haijiao

doi:10.16861/j.cnki.zggc.2025.0463

Abstract：To investigate the control effects of different microbial inoculants on potato continuous cropping diseases,Ba-cillus subtilis(T1),Trichoderma harzianum(T2),actinomycetes(T3),a compound inoculant(T4,containing Bacillus am-yloliquefaciens+Trichoderma),and conventional chemical fertilizers(CK)were used as the research objects.By analyzing the effects of each treatment on potato growth,physiology and biochemistry,yield,quality,disease incidence,and soil mi-crobial community,the control effects of different microbial inoculants on potato continuous cropping diseases were clari-fied.The results showed that microbial inoculants could significantly promote potato growth,improve yield and quality,while optimizing soil microecology and inhibiting the occurrence of soil-borne diseases.Specifically,compared with CK,the plant height,stem diameter,leaf area,root length,relative chlorophyll content,and root activity of the T4 treatment were extremely significantly increased by 30.39%,30.00%,35.97%,46.43%,23.70%,and 58.86%,respectively.Mean-while,the disease indexes of potato black scurf and common scab in the T4 treatment were extremely significantly re-duced by 65.76%and 51.17%compared with CK.In addition,the T4 treatment achieved the highest potato yield of 2 950.25 kg per 667 m²,which was extremely significantly 40.47%higher than that of CK.In conclusion,the compound inoculant containing Bacillus amyloliquefaciens and Trichoderma exhibits a favorable control effect on potato continuous cropping diseases and is worthy of popularization and application in field production.