CROP COEFFICIENT OF MARANDU PALISADE GRASS: AN APPROACH INVOLVING LEAF AREA INDEX AND CANOPY HEIGHT

Authors

  • Débora Pantojo de Souza Doutora, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Piracicaba, CEP: 13419-800 São Paulo, Brasil https://orcid.org/0000-0001-7483-3898
  • Arthur Carniato Sanches Docente, Universidade Federal da Grande Dourados –UFGD, Faculdade de Ciências Agrárias, Rodovia Dourados/Itahum, Km 12 - Unidade II, CEP: 79.804-970, Dourados – Mato Grosso do Sul, Brasil https://orcid.org/0000-0003-2379-0634
  • Fernando Campos Mendonça Docente, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Piracicaba, CEP: 13419-800 São Paulo, Brasil https://orcid.org/0000-0003-4899-7092
  • Felipe Gustavo Pilau Docente, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Piracicaba, CEP: 13419-800 São Paulo, Brasil https://orcid.org/0000-0003-1370-5352
  • Fernanda Lamede Ferreira de Jesus Docente, Universidade Federal Rural da Amazônia–UFRA campus Tomé-Açu, Rodovia PA- 451, Km-03, Bairro Açaizal, CEP: 68.680-000, Tomé-Açu – Pará, Brasil https://orcid.org/0000-0002-9183-6326

DOI:

https://doi.org/10.15809/irriga.2021v26n4p924-937

Abstract

Determining the evapotranspiration rate enhances our understanding of plant water needs, potentially improving irrigation management. This study aimed to investigate the water consumption of the Marandu palisade grass (Urochloa brizantha) cultivar ‘Marandu’, single cropped and intercropped with black oat and ryegrass, by determining the crop coefficient (Kc) and their correlation with canopy height (CH) and leaf area index (LAI). The experiment was carried out at ESALQ/USP from April 2016 to January 2017. Two weighing lysimeters were used for calculated the Crop evapotranspiration (ETc): one with single-cropped Marandu palisade grass throughout the year and the other intercropped with black oat and ryegrass during autumn and winter (from April to September 2016). Estimated Kc, CH, and LAI were measured every 4-day. Regression equations were generated to determine the correlation between Kc and CH and Kc and LAI in each season. Minimum and maximum Kc values for single cultivation in each season were: 0.61 and 0.97 for spring, 0.45 and 1.10 for summer, 0.47 and 0.74 for autumn, and 0.52 and 0.94 for winter.  In the intercropped cultivation, Kc values ranged from 0.62 to 1.04.

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Published

2021-12-22

How to Cite

SOUZA, Débora Pantojo de; SANCHES, Arthur Carniato; MENDONÇA, Fernando Campos; PILAU, Felipe Gustavo; JESUS, Fernanda Lamede Ferreira de. CROP COEFFICIENT OF MARANDU PALISADE GRASS: AN APPROACH INVOLVING LEAF AREA INDEX AND CANOPY HEIGHT. IRRIGA, [S. l.], v. 26, n. 4, p. 924–937, 2021. DOI: 10.15809/irriga.2021v26n4p924-937. Disponível em: http://revistas.fca.unesp.br/index.php/irriga/article/view/4278. Acesso em: 22 feb. 2025.

Issue

Vol. 26 No. 4 (2021): Irriga

Section

Artigos

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Copyright (c) 2021 IRRIGA

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