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- Title
Yield, water use efficiency, and yield response factor in carrot crop under different irrigation depths.
- Authors
Fonseca de Carvalho, Daniel; de Oliveira Neto, Dionizio Honório; Fernando Felix, Luiz; Marinho Guerra, José Guilherme; Ayade Salvador, Conan
- Abstract
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 2010-2011 period. 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.
- Subjects
CARROT research; WATER requirements for crops; TIME-domain reflectometry; ORGANIC farming; IRRIGATION research
- Publication
Ciência Rural, 2016, Vol 46, Issue 7, p1145
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/0103-8478cr20150363