02496naa a2200373 a 450000100080000000500110000800800410001910000200006024501520008026000090023252014250024165000160166665000240168265000110170665000220171765000200173965000160175965000120177565000170178765000250180465000290182965000120185865000100187065000140188065000220189465300220191665300250193865300210196370000200198470000250200470000260202970000170205577300500207221644492024-05-24       2024    bl uuuu     u00u1 u    #d1 aALVES, D. M. S.  aTop dressing of nitrogen and phosphorus fertilizer increases yield and leads to biofortification of a local cowpea genotype.h[electronic resource]  c2024  aThe traditional local genotype, EPACE-10, has a higher grain protein content (GPC) but a lower yield than the commercial genotypes, Gurgu ́eia or Novaera. This study aimed to evaluate whether the GPC and quality or productivity of these different genotypes could be affected by top dressing fertilization with nitrogen (N) or phosphorus (P). In the first experiment, EPACE 10 and Gurgu ́eia were subjected to the following treatments: inoculated with Rhizobium and only inoculated with N fertilization 25 days after sowing (DAS) or at the first flowering stage. In the second experiment, EPACE-10 and Novaera were subjected to the following treatments: inoculated only; inoculated plus mono ammonium phosphate (MAP) or urea applied at the pollination stage. In both experiments, none of the treatments resulted in an increase in GPC for each genotype. However, treatment with N at 25 DAS in the first experiment and with MAP in the second experiment increased methionine and cysteine content in EPACE 10, while treatment with N in the second experiment increased methionine content in Novaera. Therefore, in both trials, the top dressing fertilizer treatments increased the yield of EPACE 10 to the same level as Gurgu ́eia or Novaera. Furthermore, the local genotype EPACE 10 exhibited a positive response to P fertilization, resulting in increased methionine and cysteine content and yield specific to its genotype.  aAmino acids  aAmmonium phosphates  aGrains  aNitrogen fixation  aProtein sources  aAminoácido  aFeijão  aFertilizante  aFixação de Fosfato  aFixação de Nitrogênio  aFosfato  aGrão  aProteína  aVigna Unguiculata  aBiofortificação  aFontes de proteínas  aGrain amino acid1 aFERREIRA, W. M.1 aFONSECA, M. P. S. DA1 aCARVALHO, J. L. V. de1 aPIMENTEL. C.  tScientia Horticulturaegv. 334, 113204, 2024.