@Article{MatsunagaSiAmSaDaOl:2022:EvCrCo,
author = "Matsunaga, Wendy K. and Silva, Vicente P. R. and Amorim,
Vict{\'o}ria Pereira and Sales, Eliton S. G. and Dantas, Silvia
M. and Oliveira, Andr{\'e} B.",
affiliation = "{Universidade Federal de Campina Grande (UFCG)} and {Universidade
Federal de Campina Grande (UFCG)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Federal de Campina
Grande (UFCG)} and {Universidade Federal de Campina Grande (UFCG)}
and {Universidade Federal de Campina Grande (UFCG)}",
title = "Evapotranspiration, crop coefficient and water use efficiency of
onion cultivated under different irrigation depths",
journal = "Revista Brasileira de Engenharia Agricola e Ambiental",
year = "2022",
volume = "26",
number = "3",
pages = "219--225",
keywords = "Allium cepa L, Soil water balance, Water need, Allium cepa L.,
balan{\c{c}}o h{\'{\i}}drico do solo, necessidade
h{\'{\i}}drica.",
abstract = "This study aimed to determine crop evapotranspiration through the
soil water balance, the crop coefficient and water use efficiency
of the onion (Allium cepa L.) in a system with four irrigation
regimes, cultivated in the semiarid region of northeastern Brazil.
Two field experiments were carried out during the rainy and dry
periods of the region in 2018, using the treatments of 100% (T1),
75% (T2), 50% (T3) and 25% (T4) of the reference
evapotranspiration for daily water replacement and five replicates
for each treatment. It was verified that crop evapotranspiration
varies according to the water availability in the soil; however,
the highest water use efficiency occurred for the T3 treatment.
The T1 treatment obtained the highest estimated yield, 43.86 tons
ha-1, while T4 obtained 13.47 tons ha-1, the lowest estimated
yield among the treatments, and this difference was statistically
significant (p \≤ 0.05) by F test. The crop coefficients
obtained were 0.68, 0.89, 0.99 and 0.73 for the initial,
vegetative, bulbing and maturation stages, respectively. RESUMO:
Este estudo objetivou determinar a evapotranspira{\c{c}}{\~a}o
da cultura atrav{\'e}s do balan{\c{c}}o de {\'a}gua no solo, o
coeficiente de cultivo e a efici{\^e}ncia do uso da {\'a}gua da
cebola (Allium cepa L.) em um sistema com quatro regimes de
irriga{\c{c}}{\~a}o, cultivada no semi{\'a}rido nordestino.
Foram realizados dois experimentos de campo durante os
per{\'{\i}}odos chuvoso e seco da regi{\~a}o no ano de 2018,
utilizando-se os tratamentos de 100% (T1), 75% (T2), 50% (T3) e
25% (T4) da evapotranspira{\c{c}}{\~a}o de refer{\^e}ncia para
reposi{\c{c}}{\~a}o h{\'{\i}}drica di{\'a}ria e cinco
repeti{\c{c}}{\~o}es para cada tratamento. Verificouse que a
evapotranspira{\c{c}}{\~a}o da cultura varia de acordo com a
disponibilidade h{\'{\i}}drica no solo, entretanto, a maior
efici{\^e}ncia do uso da {\'a}gua ocorreu para o tratamento T3.
O tratamento T1 obteve a maior produtividade estimada em 43.86
tons ha-1 e T4 com 13.47 tons ha-1, a menor produtividade estimada
entre os tratamentos. Essa diferen{\c{c}}a foi estatisticamente
significativa (p \≤ 0,05) pelo teste F. Os valores do
coeficiente de cultivo obtidos foram de 0,68; 0,89; 0,99 e 0,73
para as fases inicial, vegetativo, bulbifica{\c{c}}{\~a}o e
matura{\c{c}}{\~a}o, respectivamente.",
doi = "10.1590/1807-1929/AGRIAMBI.V26N3P219-225",
url = "http://dx.doi.org/10.1590/1807-1929/AGRIAMBI.V26N3P219-225",
issn = "1415-4366",
language = "en",
targetfile = "matsunaga_2022_evapotranspiration.pdf",
urlaccessdate = "25 jun. 2024"
}