Water productivity in irrigated coconut palms in humid tropical climate conditions in eastern Brazilian Amazon/Produtividade da agua em coqueiro irrigado nas condic es de clima tropical mido na Amaz nia Oriental

• Published in: Ciência rural 2024-11, Vol.54 (11), p.1
• Main Authors: de Carvalho, Erika de Oliveira Teixeira, Fernandes, Gabriel Siqueira Tavares, Rua, Matheus Lima, Monteiro, Adrielle Carvalho, da Silva, Joao Vitor Ferreira, de Lourdes Alcantara Velame, Maria, de Novoa Pinto, Joao Vitor, Lins, Paulo Manoel Pontes, de Miranda, Fabio Rodrigues, de Souza, Paulo Jorge De Oliveira Ponte
• Format: Article
• Language: English
• ISSN: 0103-8478
• DOI: 10.1590/0103-8478cr20230416

The growing demand for coconut water has led to the expansion of irrigated green dwarf coconut cultivation; however, the inefficient use of water has contributed to the degradation and waste of water resources, making fundamental studies aiming to optimize the use of water. The objective of this study was to determine the physical productivity and water productivity of green dwarf coconut palms under the climatic conditions of Santa Izabel do Para, eastern Amazonia, Brazil. The experiment was carried out from 2020 to 2021, in a green dwarf coconut plantation spaced 7.5 m x 7.5 m in a triangle, at Fazenda Reunidas Sococo, with an area of approximately 7 ha. Water productivity (WP) was determined both in terms of fruit production ([WP.sub.f]) and coconut water production ([WP.sub.ca]), through the relationship of fruit productivity (fruit biomass and water volume) with accumulated evapotranspiration. The dwarf coconut tree presented a total production of 105 and 186 fruits [plant.sup.-1] and 37 and 62 L [plant.sup.-1] of coconut water in the years 2020 and 2021. The largest volumes of water and the highest weights occurred during the wettest season. [WP.sub.f]was of 1.87 fruits [m.sup.-3](2020) and 2.94 fruits [m.sup.-3] (2021) and [WP.sub.ca] 0.66 L [m.sup.-3](2020) and 0.98 L [m.sup.-3] (2021). Key words: Cocos nucifera, WP, evapotranspiration. A crescente demanda por agua de coco tem ocasionado a expansao do cultivo de coqueiro-anao-verde irrigado, no entanto, o uso ineficiente da agua tem contribu do com a degradacao e desperd cio dos recursos h dricos, tornando fundamental estudos que visem otimizar o uso da agua. Objetivou-se determinar a produtividade f sica e a produtividade da agua do coqueiro-anao-verde, nas condic es climaticas de Santa Izabel do Para, leste da Amaz nia, Brasil. O experimento foi realizado no per odo de 2020 a 2021, em um plantio de coqueiro-anao-verde em espacamento 7,5 m x 7,5 m em tri ngulo, na Fazenda Reunidas Sococo, apresentando uma area de aproximadamente 7 ha. A produtividade da agua (PA) foi determinada tanto em termos de producao de frutos ([PA.sub.f]) como de producao de agua de coco ([PA.sub.ac]), atraves da relacao da produtividade de frutos (biomassa do fruto e volume de agua) com a evapotranspiracao acumulada. O coqueiro-anao apresentou uma producao total de 105 e de 186 frutos [planta.sup.-1] e de 37 e de 62 L [planta.sup.-1] de agua de coco nos anos de 2020 e 2021. A evapotranspiracao total foi de 56,2 [m.sup.3] (