Soil water potential during different phenological phases of coffee irrigated by center pivot
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Data
2013-04
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Resumo
Irrigation management can be established, considering the soil water potential, as the
limiting factor for plant growth, assuming the soil water content between the field capacity and the
permanent wilting point as available water for crops. Thus, the aim of this study was to establish the
soil water potential interval during four different phenological phases of coffee irrigated by center
pivot. The experiment was set at the experimental area of the Engineering Department at the
Federal University of Lavras, in Brazil. The coffee variety planted is designated as Rubi, planted
0.8 meters apart, with rows spaced 3.5 meters apart. The treatments corresponded to the water
depths applied based on different percentages of Kc and reference evapotranspiration (ET 0 ) values.
Sensors were used to measure the soil water potential interval, installed 25 centimeters depth. In
order to compare the results, it was considered as the best matric potential the one that was balanced
with the soil water content that resulted in the largest coffee productivity. Based on the obtained
results, we verified that in the phases of fruit expansion and ripening, the best results were obtained,
before the irrigations, when the soil water potential values reached -35 and -38 kPa, respectively.
And in the flowering, small green and fruit expansion phases, when the values reached -31 and -32
kPa, respectively.
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Palavras-chave
Irrigated coffee, Coffea arabica L., Available water, Cafeicultura irrigada, Água disponível, Coffea arabica L.
Citação
EVANGELISTA, Adão W. P.; LIMA, Luiz A.; SILVA, Antônio C. da; MARTINS, Carla de P.; RIBEIRO, Moisés S. Soil water potential during different phenological phases of coffee irrigated by center pivot. Engenharia Agrícola, Jaboticabal, v. 33, n. 2, p. 269-278, Mar./Apr. 2013.