Journal of Zhejiang Agricultural Sciences ›› 2025, Vol. 66 ›› Issue (12): 2910-2915.DOI: 10.16178/j.issn.0528-9017.20240632

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Effects of fertilizer synergists on soil nutrients, agronomic traits and economic characteristics of tobacco

LI Qian1(), ZHANG Xiang1, LI Liang1, SI Xianzong1, SUO Yanyan1, CHENG Peijun1, LI Hongliang2, LI Jianhua2, SONG Zhengxiong3,*()   

  1. 1. Institute of Plant Nutrient and Environmental Resources, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan
    2. Xuchang Tobacco Company, Xuchang 461000, Henan
    3. Song County Tobacco Company of Luoyang City, Luoyang 471400, Henan
  • Received:2024-08-01 Online:2025-12-11 Published:2025-12-17

Abstract:

To enhance fertilizer utilization and improve soil nutrient levels in tobacco fields, thereby increasing tobacco yield and quality, a field experiment was conducted to investigate the effects of four fertilizer synergists, including chitosan(T2), diethyl aminoethyl hexanoate (DA-6)(T3), brassinolide(T4), and polyaspartic acid(T5), on soil nitrogen content, enzyme activity, agronomic traits of flue-cured tobacco, and economic characteristics of cured tobacco leaves. The results showed that the application of different fertilizer synergists increased the content of total nitrogen, alkali-hydrolyzable nitrogen, and nitrogen in microbe in the soil. Specifically, T3 treatment resulted in the highest total nitrogen content at the rosette and budding stages, while T4 treatment showed the highest total nitrogen content at the maturity stage. The highest alkali-hydrolyzable nitrogen content was observed in T5 treatment at the rosette stage, T3 treatment at the budding stage, and T2 treatment at the maturity stage. T3 treatment achieved the highest soil nitrogen content in microbe at the rosette stage, while T5 showed the highest levels at both the budding and maturity stages. All fertilizer synergists increased the activities of soil sucrase, protease, and catalase across the three growth stages. Additionally, the application of fertilizer synergists improved the yield, output value, average price, and proportion of high-grade cured tobacco leaves, with the T3 treatment performing the best. Overall, DA-6 demonstrated comparatively good effects as a fertilizer synergist.

Key words: flue-cured tobacco, fertilizer synergist, soil, yield, quality

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