Abstract

ROMERO-FELIX, Celia Selene et al. Yield and accumulated biomass in common bean under irrigation and rainfed. Rev. Mex. Cienc. Agríc [online]. 2021, vol.12, n.8, pp.1363-1376.  Epub May 02, 2022. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v12i8.2682.

Common bean (Phaseolus vulgaris L.) grown under rainfed conditions is affected by terminal drought, considerably reducing the seed yield and biomass accumulated in the canopy of the plant. The objective of this study was to evaluate the variability in seed yield, phenology and aerial biomass accumulated during the reproductive stage, in a group of common bean varieties, under irrigation (I) and drought (D) conditions, at the College of Postgraduates, Montecillo Campus. Eight genotypes of ‘Flor de Mayo’-type bean were used, three with black testa and one native, under a randomized complete block design with three repetitions in I and three in D, in the 2014 summer-autumn cycle. The fertilization dose 80-40-00 was used. D decreased seed yield (30%), biomass accumulated at the beginning of flowering (BMBF) (22%), biomass accumulated at anthesis (BMA) (19%) and biomass accumulated at physiological maturity (BMPM) (19%) and harvest index (14%) with respect to I. D also reduced the days and degree days to the beginning of flowering, anthesis and physiological maturity. There was variability within the group of bean varieties evaluated, with FM 2000 standing out for having high seed yield, on average of I and D, and in each moisture condition (I and D). While FM RMC stood out for exhibiting higher BMBF, BMA and BMPM, both in I and D.

Keywords : Phaseolus vulgaris L.; degree days; phenology; rainfed..