Crop coefficient estimated by degree-days for `Marandu' palisadegrass and mixed forage

Autor(es)

de Souza, Debora Pantojo ^[1] ; Sanches, Arthur Carniato ^[2] ; Mendonca, Fernando Campos ^[1] ; Macedo Pezzopane, Jose Ricardo ^[3] ; Amorim, Danielle Morais ^[1] ; Ferreira de Jesus, Fernanda Lamede ^[4]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz ESALQ, Piracicaba, SP - Brazil

^[2] Fundacao Univ Fed Grande Dourados, Fac Ciencias Agr FCA, Dourados, MS - Brazil

^[3] Embrapa Pecuaria Sudeste, Sao Carlos, SP - Brazil

^[4] Univ Fed Rural Amazonia UFRA, Dept Engn Agr, Tome Acu, Para - Brazil

• Tipo de documento: Artigo Científico
• Fonte: REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS; v. 53, n. 2, p. 71-81, DEC 2021.
• Citações Web of Science: 0

Resumo

Considering profitability in pasture-based systems, investigating parameters affecting crop coefficients for irrigation management becomes important. In this experiment, we determined the crop coefficient of `Marandu' palisadegrass based on accumulated degree-days and estimated plant water consumption under single ('Marandu' palisadegrass) and mixed ('Marandu' palisadegrass + black oats + Italian ryegrass) cropping regimes. The research was conducted at the Luiz de Queiroz College of Agriculture in Piracicaba, Sao Paulo, Brazil, between 2016 and 2017. Evapotranspiration was assessed using weighing lysimeters while crop evapotranspiration was calculated using mean weight variation. Reference evapotranspiration and degree-days were estimated. Data were obtained from an automated weather station. Equations and regression models relating crop coefficient with accumulated degree-days were generated for two seasons (spring/summer and autumn/winter) and evaluated for two year-cycles, from 2015 to 2018. The results showed better prediction accuracy for the single cropping system in spring/summer 2017-18. (AU)

• Processo FAPESP: 12/23002-6 - Determinação do coeficiente de cultura (KC) de plantas forrageiras tropicais em cultivo solteiro e em condições de sobressemeadura com forrageiras de clima temperado
• Beneficiário: Fernando Campos Mendonca
• Modalidade de apoio: Auxílio à Pesquisa - Regular