Título:	Yield, water use efficiency, and yield response factor in carrot crop under different irrigation depths
Autoria:	CARVALHO, D. F. de OLIVEIRA NETO, D. H. de FELIX, L. F. GUERRA, J. G. M. SALVADOR, C. A.
Afiliação:	DANIEL FONSECA DE CARVALHO, UFRRJ; DIONIZIO HONÓRIO DE OLIVEIRA NETO, AGRISTAR DO BRASIL, SANTO ANTONIO DA POSSE, SP; LUIZ FERNANDO FELIX, VIA AGRÍCOLA LTDA., UBERABA, MG; JOSE GUILHERME MARINHO GUERRA, CNPAB; CONAN AYADE SALVADOR, UFRRJ.
Ano de publicação:	2016
Referência:	Ciência Rural, Santa Maria, v.46, n.7, p.1145-1150, jul., 2016.
Conteúdo:	The aim of the present study was to evaluate the effect of different irrigation depths on the yield, water use efficiency (WUE), and yield response factor (Ky) of carrot (cv. 'Brasília') in the edaphoclimatic conditions of Baixada Fluminense, RJ, Brazil. Field trials were conducted in a Red-Yellow Argisol in the 2010-2011period. A randomized block design was used, with 5 treatments (depths) and 4 replicates. Depths were applied by drippers with different flow rates, and the irrigation was managed by time domain reflectometry (TDR) technique. The reference (ETo) and crop (ETc) evapotranspiration depths reached 286.3 and 264.1mm in 2010, and 336.0 and 329.9mm in 2011, respectively. The root yield varied from 30.4 to 68.9t ha-1 as a response to treatments without irrigation and 100% replacement of the soil water depth, respectively. Values for WUE in the carrot crop varied from 15 to 31kg m-3 and the mean Ky value was 0.82. The mean values for Kc were obtained in the initial (0.76), intermediate (1.02), and final (0.96) stages. Carrot crop was influenced by different water depths (treatments) applied, and the highest value for WUE was obtained for 63.4% of soil water replacement.
Thesagro:	Daucus Carota
NAL Thesaurus:	Soil water balance Organic production
Palavras-chave:	Crop water requirement
ISSN:	1678-4596
Digital Object Identifier:	http://dx.doi.org/10.1590/0103-8478cr20150363.
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPAB)