Water Requirement and Crop Coefficients of Young Jatropha curcas L. Trees in a Subtropical Humid Environment

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Lena, Bruno Patias ^[1] ; Folegatti, Marcos Vinicius ^[2] ; Flumignan, Danilton Luiz ^[3] ; Irmak, Suat ^[4] ; Francisco, Joao Paulo ^{[5, 6]} ; Diotto, Adriano Valentim ^[7] ; Almeida Santos, Otavio Neto ^[8] ; de Sousa Andrade, Irineu Pedro ^[9] ; Fanaya Junior, Eder Duarte ^[10] ; Alves Marques, Patricia Angelica ^[2] ; Almeida Barboza Junior, Cicero Rene ^[11]

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^[1] Auburn Univ, Dept Crop Soil & Environm Sci, 201 Funchess Hall, Auburn, AL 36830 - USA

^[2] Luiz de Queiroz Coll Agr, Dept Agr Syst Engn, Ave Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil

^[3] Brazilian Agr Res Corp, Rodovia BR 163, Km 253, BR-79804970 Dourados, MS - Brazil

^[4] Univ Nebraska, 239 LW Chase Hall, 3605 Fair St, Lincoln, NE 68503 - USA

^[5] Univ Fed Rural Rio de Janeiro, Rod BR-465, Setopedica, SP - Brazil

^[6] Univ Estadual Maringa, Agron Sci Dept, Estr Paca S-N, BR-87507190 Umuarama, PR - Brazil

^[7] Univ Fed Lavras, Dept Agr, BR-37200900 Lavras, MG - Brazil

^[8] Luiz de Queiroz Coll Agr, Ave Padua Dias 11, Piracicaba, SP - Brazil

^[9] Fed Inst Educ Sci & Technol Rondonia, Rod BR-174, Km 3, BR-76980000 Vilhena, RO - Brazil

^[10] Univ Estadual Mato Grosso do Sul, Dept Agr Syst Engn, Rod Graziela Maciel Barroso, Km 12, BR-70200000 Aquidauana, MS - Brazil

^[11] Fed Univ Oeste Bahia, Ave 23 Agosto, BR-47100000 Barra, BA - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING; v. 147, n. 7 JUL 1 2021.
• Citações Web of Science: 0

Resumo

Long-term and continuous crop evapotranspiration (ETc) and the crop coefficient (K-c) of jatropha (Jatropha curcas L.), which are needed to determine irrigation requirements, are lacking. The objective of this study was to measure jatropha ETc and K-c over four growing years. Field experiments were conducted from March 2012 to August 2015, and three different irrigation treatments were evaluated. The K-c values were determined for the irrigated treatments as the ratio between the ETc and grass-reference evapotranspiration (ET0) (i.e., K-c = ETc/ET0) ). The ETc was determined using a directly weighing lysimeter, and agrometeorological parameters measured at a weather station were used to estimate the ET0. Over the four growing years, the ETc values ranged from 0.7 to 8.3 mm day(-1) for center pivot irrigation, 0.6 - 7.4 nun day(-1) for drip irrigation, and 0.4 - 5.4 min day(-1) for no irrigation (rainfed). In the first growing year, a K-c average of 0.6 for all treatments was found. The highest K-c values were obtained at midphase (from December to February), with values of 0.9 and 0.8 in the second growing year, respectively, for the center pivot and drip treatments. During the same growth phase for the third and fourth growing season, the K-c for both irrigated treatments were averaged at 0.9. (C) 2021 American Society of Civil Engineers. (AU)

• Processo FAPESP: 13/16638-4 - Evapotranspiração e coeficiente de cultivo da cultura do pinhão-manso a partir do terceiro ano de cultivo associada a diferentes tipos de poda
• Beneficiário: Marcos Vinícius Folegatti
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/19333-0 - Evapotranspiração e coeficiente de cultivo do pinhão-manso no terceiro e quarto ano
• Beneficiário: Bruno Patias Lena
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 11/16321-5 - Consumo hídrico do pinhão-manso (Jatropha curcas L.) irrigado e sem irrigação na fase de formação
• Beneficiário: Bruno Patias Lena
• Modalidade de apoio: Bolsas no Brasil - Mestrado