Leaf blade area estimate of Digitaria pentzii under different cutting heights

Authors

Abstract

Pasture studies require information on leaf area, as it is one of the main parameters for evaluation of plant growth. Thus, the objective of this study was to estimate the leaf blade area of pangolão grass (Digitaria pentzii Stent.) using non-destructive methods by regression model analysis. The experimental design consisted of randomized blocks, with three cutting heights (10, 15, and 20 cm) and four replications. Three hundred leaf blades of pangolão grass were randomly collected, and their respective lengths (L) and widths (W) determined using a digital caliper. The leaf blade area of pangolão grass was estimated by the gravimetric method, using linear and power regression models to explain the leaf blade area as a function of the product of L and maximum W. The real leaf blade area presented an average value of 18.64 cm², ranging from 4.29 to 45.95 cm². The leaf blade area of pangolão grass, regardless of cutting height, was estimated with greater accuracy by the power model. The power model, ?=LW1.007, can be used to estimate the leaf blade area of pangolão grass based on leaf blade L and W values.
Keywords: modeling; non-destructive method; pangolão grass.

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Author Biographies

Raul Caco Alves Bezerra, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada/Discente de agronomia

Discente de agronomia da Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada

Mauricio Luiz de Mello Vieira Leite, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada Professor associado I

Professor associado I da Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada

Área: Pastagens e forragicultura.

Mirna Clarissa Rodrigues de Almeida, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada

Discente do Programa de Pós-graduação e Produção vegetal da Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada 

Leandro Ricardo Rodrigues de Lucena, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada

Professor adjunto I da Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada

Área: Estatística.

Vicente José Laamon Pinto Simões, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada

Discente do Programa de Pós-graduação e Produção vegetal da Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada

Aldo Tores Sales, Instituto Tecnológico de Pernambuco

Professor do Programa de Pós-graduação em tecnologias Ambientais do Instituto Tecnológico de Pernambuco.

Área: Zootecia/Pastagens e forragicultura.

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Published

2020-04-22

How to Cite

BEZERRA, R. C. A.; LEITE, M. L. de M. V.; ALMEIDA, M. C. R. de; LUCENA, L. R. R. de; SIMÕES, V. J. L. P.; SALES, A. T. Leaf blade area estimate of Digitaria pentzii under different cutting heights. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 21, 2020. Disponível em: https://revistas.ufg.br/vet/article/view/54719. Acesso em: 16 aug. 2024.

Issue

Vol. 21 (2020): Continuous publication

Section

ZOOTECNIA

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