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Manuel Milla-Pino
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Abstract
In the production of forage species, it is imperative to determine the dynamics of biomass accumulation at different times of the year. Objectives: This study was aimed at modeling the dynamics of dry matter production in Brachiaria hybrid cv. Cayman grass during the dry season. Methods: The data correspond to total biomass obtained from an investigation of pasture management with different cutting intervals, using a completely randomized block design. Two non-linear models were used (Gompertz and logistic). Results: The Gompertz model showed the best fit for estimating accumulated dry matter production (kg DM ha−1) in Brachiaria hybrid cv. Cayman at different cutting intervals. Accumulated dry matter production in Brachiaria hybrid cv. Cayman remained uniform for a longer time period for a 42- to 49-day cutting interval. Conclusions: Application of the Gompertz model is suggested for drought conditions. The sustainability of dry matter production is determined by cutting interval, intrinsic growth rate of Brachiaria hybrid cv. Cayman, and other factors affecting the development of this species.
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