Optimized Carbon and Nitrogen Co-Application Enhances Lodging Resistance in Fragrant Rice

Strategic Insights -

Researchers from South China Agricultural University have discovered that optimized carbon and nitrogen co-application can significantly improve lodging resistance in fragrant rice. The study, conducted over a two-year period from 2021 to 2022, found that a specific treatment involving the co-application of carbon and nitrogen at the booting stage can regulate stem internode morphology and improve lodging resistance. The findings have important implications for the production of fragrant rice, a crop that significantly contributes to food security.

Key Takeaways:

  • The study investigated the effects of carbon and nitrogen co-application on lodging in fragrant rice and found that optimized co-application can improve lodging resistance.
  • The research identified a specific treatment (T5: 150 mg/L glucose + 100 mg/L urea) that significantly increased the pushing resistance force by 22.22-127.78% and reduced the lodging index at a low level.
  • The study found that the internode length and dry weight significantly influenced the plant height and the pushing resistance force and then regulated the lodging index.
  • The structural equation modeling and random forest modeling analyses suggest that carbon and nitrogen co-application treatments may further improve the resistance of rice to lodging by increasing the dry weight of the third and fourth internodes.
  • The study provides guidelines for enhancing lodging resistance by regulating internode characteristics via the co-application of carbon and nitrogen at the booting stage in fragrant rice.

Statistics:

  • The study involved a 2-year field experiment with fragrant rice cultivars Meixiangzhan 2 and Xiangyaxiangzhan grown under nine carbon and nitrogen co-application treatments.
  • The T5 treatment significantly increased the pushing resistance force by 22.22-127.78%.
  • The T5 treatment kept the lodging index at a low level and reduced the plant height.
  • The structural equation modeling and random forest modeling analyses suggest that carbon and nitrogen co-application treatments can improve lodging resistance by increasing the dry weight of the third and fourth internodes by 50-77.50%.

Sources:

  • NewsRx. Research from South China Agricultural University in the Area of Agriculture Described (Carbon-Nitrogen Management via Glucose and Urea Spraying at the Booting Stage Improves Lodging Resistance in Fragrant Rice). Agriculture Week. June 26, 2025; p 2525.
  • Agriculture. Carbon-Nitrogen Management via Glucose and Urea Spraying at the Booting Stage Improves Lodging Resistance in Fragrant Rice. 2025, 15(11):1155.
  • DOI: 10.3390/agriculture15111155 (Available at https://doi-org.sdpl.idm.oclc.org/10.3390/agriculture15111155)