Cutting intervals on dry matter performance of Saboya grass (Panicum máximum Jacq.) and its silage chemical composition
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Abstract
During the dry season in the north of the Ecuadorian coast, there is a grass shortage, aspect that need to be solved. The objective of this research was to evaluate the effect of different cutting intervals on the dry biomass yield, chemical composition and nutritional quality of savoy grass (Panicum maximum Jacq.). During the rainy season transition to dry, in the Viche locality, in the province of Esmeraldas in Ecuador, the dry biomass, organoleptic characteristics, chemical and cell wall composition of savory grass silage cut at ages of 13, 20, 27, 34 and 41 days were evaluated. Treatments were set up in a Complete Random Design for the pasture characteristics and chemical composition of the silage, and in a Randomized Complete Block Design for the organoleptic characteristics of the silage. The statistical analysis was based on the Analysis of Variance and the multiple mean comparisons between treatments with Tukey at 5 %. In this research, the quality of silage organoleptic characteristics was higher at 20 and 34 days. Bromatological analyses showed a content of 8.25 % of crude protein at 27-day silage preparation, being the highest of all treatments, followed by silage preparation at 41-day with 5.53 % of crude protein. The annual dry matter yield ranged from 9.74 to 29.98 t ha-1. Silage prepared at 27 days had the highest nutritional values, while yield was higher at 41 days. None of the treatments reached an optimal level of fermentation (pH, lignification, stem/leaf ratio).
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