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Optimizing radish (Raphanus sativus L.) production through alternative nitrogen sources.

V A Targino1, T J Dias1, V F O Sousa2

  • 1Universidade Federal da Paraíba, Areia, PB, Brasil.

Brazilian Journal of Biology = Revista Brasleira De Biologia
|February 4, 2026
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Summary
This summary is machine-generated.

Nitrogen fertilization significantly impacts radish growth. Urea at 15 kg/ha is the most effective for enhancing radish yield and development, optimizing nutrient use and reducing environmental impact.

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Area of Science:

  • Agronomy
  • Plant Physiology
  • Soil Science

Background:

  • Radish (Raphanus sativus) is a nutrient-rich tuberous vegetable suitable for crop rotation.
  • Optimizing nitrogen (N) fertilization is crucial for radish development, minimizing leaching losses, environmental damage, and production costs.

Purpose of the Study:

  • To evaluate the effects of different nitrogen (N) sources and doses on radish growth and physiology.
  • To determine the optimal N fertilization strategy for maximizing radish yield and quality.

Main Methods:

  • A greenhouse experiment utilized a randomized block design with a 2x5 factorial arrangement.
  • Treatments included two N sources (urea and ammonium sulfate) and five doses (0, 15, 30, 45, 60 kg N/ha).
  • Evaluated parameters included plant height, biomass, leaf area, gas exchange, chlorophyll content, and fluorescence.

Main Results:

  • Nitrogen sources and doses positively influenced radish growth.
  • Urea application showed greater efficiency in promoting plant growth and chlorophyll indices (chlorophyll a and total chlorophyll).
  • Fertilization with 15 kg N/ha of urea yielded the most significant increase in radish growth and production.

Conclusions:

  • Urea is a more effective nitrogen source for radish cultivation compared to ammonium sulfate.
  • An application rate of 15 kg N/ha of urea is recommended for optimal radish growth and yield.
  • Strategic nitrogen fertilization can enhance radish productivity while mitigating environmental risks.