Title:	Application stages and nitrogen sources in topdressing of super-early bean crop irrigated.
Authors:	SILVA JÚNIOR, J. L. da BRAZ, A. J. B. P. BOLDRIN, P. F. FERREIRA, C. J. B. SILVEIRA, P. M. da
Affiliation:	JAIR LEAO DA SILVA JUNIOR, UNIVERSIDADE DE RIO VERDE, GO; ANTONIO JOAQUIM BRAGA PEREIRA BRAZ, UNIVERSIDADE DE RIO VERDE, GO; PAULO FERNANDES BOLDRIN, UNIVERSIDADE DE RIO VERDE, GO; CAMILA JORGE BERNABE FERREIRA, UNIVERSIDADE DE RIO VERDE, GO; PEDRO MARQUES DA SILVEIRA, CNPAF.
Date Issued:	2020
Citation:	Científica, v. 48. n. 2, p. 147-153, 2020.
Description:	Producing food in a sustainable manner, exploiting the genetic potential of crops and optimizing cultivation time to ensure increased production are the biggest challenges for agriculture. The cultivation of super-early common bean lineages with high productive capacity leads to minor water consumption in crops under irrigation and vacate the area in less time. The objective of this work was to evaluate the yield components of super-early cycle common bean cultivars, under irrigated system in function of sources of nitrogen (N) as well as to assess different application stages. The experiment was conducted in randomized block design in a factorial scheme 4x3 + 1, corresponding of four sources of N in coverage (urea, urea + ammonium sulfate, urea + ammonium sulfate + elemental sulfur and urea + elemental sulfur), three application stages (V3, V4 and R5) and a control treatment. The N incorporation did not influence on the grain yield of the super-early cycle common bean regardless of the source and season, whereas significant results were merely found when compared to the control. The number of pods was affected when the application was carried out at the R5 stage, with a significant reduction in this yield component. The relative chlorophyll index was lower when nitrogen coverage was performed at the R5 stage.
Thesagro:	Feijão Phaseolus Vulgaris Fertilizante Nitrogenado Clorofila
NAL Thesaurus:	Beans Nitrogen fertilizers Chlorophyll
Keywords:	BRS FC 104
ISSN:	1984-5529
DOI:	http://dx.doi.org/10.15361/1984-5529.2020v48n2p147-153
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPAF)