Gliricidia sepium : produtividade, composição químico-bromatológica e características de fermentação da silagem

• Autor(a) principal: Conceição, Josile Maria da
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFS
• Texto Completo: https://ri.ufs.br/handle/riufs/6843
• topic: Zootecnia; Leguminosa; Proteínas; Silagem; Alimentos; Aditivos; Adensamento; Alimento alternativo; Fermentação; Density; Alternative food; Fermentation; CIENCIAS AGRARIAS::ZOOTECNIA

Gliricidia sepium is a tree legume, resistant to water deficit, with high crude protein content in leaves and high forage mass production. These characteristics have made this legume a source of high nutritional quality, and can reduce the effects of forage seasonality on the production of ruminants. Two experiments were carried out. The first one was to evaluate the forage mass production and forage quality of gliricidia submitted to different population densities, being: 10,000, 20,000, 30,000 and 40,000 plants / ha. The following variables were evaluated: green and dry forage mass and dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) of leaves and fine stems. The experimental design was a randomized block with five replicates per treatment. The highest mass yields of green and dry forage were observed in treatments with 20,000, 30,000 and 40,000 plants / ha. PB, NDF and AD did not differ between treatments, and treatments with 10,000 and 40,000 plants / ha presented higher DM content. The recommended planting density for that local and similar edafoclimatic conditions is 20,000 plants / ha. In the second experiment, the fermentation characteristics of gliricidia silage associated to two additives (maize and molasses) were evaluated through the data of pH, lactic acid and ammoniacal nitrogen (N-NH3), and the chemical-bromatological composition of dry matter (DM), crude protein (CP), mineral matter (MM), neutral detergent fiber (NDF) and acid detergent fiber (ADF) and DM in vitro digestibility . The treatments used were: 1- 100% gliricidia (G); 2 - 95% G and 5% corn (C); 3 - 90% G and 10% C; 4 - 90% G, 5% (C) and 5% molasses (Mo); 5 - 95% G and 5% (Mo); 6 - 90% G and 10% Mo. Each treatment had five replicates, totaling thirty mini silos, arranged in a completely randomized design. PB, NDF and ADF decreased with the addition of additives in the silage, while DM and MM contents increased. The highest digestibility was achieved in treatments with the addition of 5% and 10% molasses in the silage. The addition of corn did not alter the fermentative and nutritional characteristics of the silage. The addition of molasses increased the digestibility, production of lactic acid and decreased the concentration of N-NH3. The addition of molasses from 5% improves the nutritional quality and the fermentation of gliricidia silage.