Estimating the area and weight of cactus forage cladodes using linear dimensions

• Autor(a) principal: Lucena, Leandro Ricardo Rodrigues de
• Data de Publicação: 2020
• Outros Autores: Leite, Maurício Luiz de Mello Vieira, Simões, Vicente José Laamon Pinto, Nóbrega, Camila, Almeida, Mirna Clarissa Rodrigues, Simplício, Josimar Bento
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Acta Scientiarum. Agronomy (Online)
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/45460
• topic: Clone Sweet Giant; Non destructive method; Modeling; Nopalea cochenillifera; Regression.; Giant Sweet clone; non-destructive method; modelling; Nopalea cochenillifera; regression.

The forage palm is one of the main forages of ruminants in semiarid regions. Measurements of leaf area are required in agronomic studies because they are one of the main parameters used to evaluate plant growth. The objective of this study was to validate and define the best models for estimating the area and weight of Giant Sweet clone (Nopalea cochenillifera) forage cladodes in a non-destructive way based on the linear dimensions of length, width and thickness. There were 432 randomly measured cladodes at 550 days after planting. The length, width and thickness of each cladode were measured using a digital calliper. The cladodes were weighed individually. The cladode area was calculated by the gravimetric method. The power regression model was the most efficient method to explain the cladode area as a function of the product of length by width, while the gamma model was the most efficient method to explain the weight of cladodes as a function of the product of length by width and thickness. The power model,  and gamma model, = 0.536T + 0.028LW, were used to determine the area and weight of Nopalea cochenillifera Giant Sweet clone cladodes, respectively, based on the values of linear dimensions measured independently of the order of the cladode.