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Effects of bio-organic fertilizer on the occurrence of main soil-borne diseases, yield and quality of flue-cured tobacco
CHEN Fa-yuan, MA Jun, ZHANG Xin, WU Fang-lian, ZHAI Lin-dun, ZHAO Tong-zhou, SUN Xue-cheng, HUANG Hong
HUBEI AGRICULTURAL SCIENCES
2025, 64 (3):
44-48.
DOI: 10.14088/j.cnki.issn0439-8114.2025.03.007
To determine the control effect of bio-organic fertilizer added with biocontrol agent on soil-borne diseases of flue-cured tobacco, two treatments of commercial organic fertilizer (T1, CK) and bio-organic fertilizer (commercial organic fertilizer,Trichoderma harzianum agent and Bacillus amyloliquefaciens agent was mixed at a mass ratio of 6∶1∶1, T2) were set up. A field experiment was conducted to study the effects of organic fertilizer added with biocontrol agents on the incidence, disease index of bacterial wilt, black shank and root knot nematodiasis at 30,50 and 70 days after transplanting, as well as the yield and output value of flue-cured tobacco. The results showed that, after 30, 50 and 70 days of transplanting, compared with CK, the control effect of T2 on bacterial wilt was 47.0%,66.6% and 73.7%, the control effect on black shank was 38.8%,34.6% and 11.7%, and the control effects on root-knot nematodiasis were 60.0%,38.1% and 22.2%, respectively, indicating that the control effects of bio-organic fertilizer treatment on flue-cured tobacco bacterial wilt were stable and increased with the growth stage,while the control effects on black shank disease and root-knot nematodiasis were limited and the best effect was at the seedling stage. Compared with CK, the yield and output value of T2 increased by 10.6% and 10.2%, respectively, and the proportion of superior tobacco increased by 12 percentage points. The commercial organic fertilizer combined with Trichoderma harziensis and Bacillus amyloliquefaciens could significantly reduce the occurrence of tobacco bacterial wilt, have certain control effects on tobacco black shank disease and root knot nematodiasis, and improve the yield and output value of tobacco leaves after curing and the proportion of high-grade tobacco, which could be further promoted and applied in the tobacco-growing area of southwestern Guizhou Province.
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