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<p>Melon (<i>Cucumis melo</i> L.) and tomato (<i>Solanum lycopersicum</i> L.) are key horticultural crops cultivated in protected agricultural facilities across North China. Nitrification inhibitors and microbial agents have been used to improve soil available nutrients. However, the effect of nitrification inhibitors and microbial agents on melons and tomatoes is unclear. This study investigated whether five additional treatments using nitrification inhibitors (dicyandiamide, DCD and 3, 4-dimethylpyrazole phosphate, DMPP) or/and microbial agents could enhance soil nutrients, tomato and melon growth, and yield in the tomato–melon rotation system in the North China Plain. The results showed that the combination of DCD and a microbial agent resulted in the lowest concentration of nitrate nitrogen in the soil. In addition, the application of DMPP alongside a microbial agent notably enhanced the plant height and stem diameter of melon, whereas the combination of DCD and a microbial agent led to the greatest plant height and stem diameter in tomato. Both nitrification inhibitors and microbial agents exhibited a markedly positive influence on the melon and tomato yields; among treatments, the co-application of DMPP and microbial agent showed the greatest yield improvement of 21.7% for melon and of 41.5% for tomato, compared to the local fertilization. Furthermore, the co-application of DMPP and microbial agent significantly improved tomato fruit quality with a 65.5% increase in vitamin C content, a 172.2% elevation in sugar-acid ratio, and a 43.5% reduction in nitrate concentration, compared to the local fertilization. In conclusion, nitrification inhibitors with microbial agent could effectively promote the growth and yield of melon and tomato, by regulating the soil available nutrient content and inhibiting the soil nitrogen nitrification.</p>

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Combined Effect of Nitrification Inhibitor and Microbial Agent on the Tomato–Melon Development, Yield, and Soil Nutrients in Crop Rotation System

  • 期刊论文

  • 发表日期：

    2025年7月4日

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  • Zitian Pu,
  • Ruifang Zhang,
  • Chi Zhang,
  • Chunnan Zhang,
  • Hong Wang,
  • Xin-Xin Wang

摘要

Melon (Cucumis melo L.) and tomato (Solanum lycopersicum L.) are key horticultural crops cultivated in protected agricultural facilities across North China. Nitrification inhibitors and microbial agents have been used to improve soil available nutrients. However, the effect of nitrification inhibitors and microbial agents on melons and tomatoes is unclear. This study investigated whether five additional treatments using nitrification inhibitors (dicyandiamide, DCD and 3, 4-dimethylpyrazole phosphate, DMPP) or/and microbial agents could enhance soil nutrients, tomato and melon growth, and yield in the tomato–melon rotation system in the North China Plain. The results showed that the combination of DCD and a microbial agent resulted in the lowest concentration of nitrate nitrogen in the soil. In addition, the application of DMPP alongside a microbial agent notably enhanced the plant height and stem diameter of melon, whereas the combination of DCD and a microbial agent led to the greatest plant height and stem diameter in tomato. Both nitrification inhibitors and microbial agents exhibited a markedly positive influence on the melon and tomato yields; among treatments, the co-application of DMPP and microbial agent showed the greatest yield improvement of 21.7% for melon and of 41.5% for tomato, compared to the local fertilization. Furthermore, the co-application of DMPP and microbial agent significantly improved tomato fruit quality with a 65.5% increase in vitamin C content, a 172.2% elevation in sugar-acid ratio, and a 43.5% reduction in nitrate concentration, compared to the local fertilization. In conclusion, nitrification inhibitors with microbial agent could effectively promote the growth and yield of melon and tomato, by regulating the soil available nutrient content and inhibiting the soil nitrogen nitrification.