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Ciência Rural

versión impresa ISSN 0103-8478

Resumen

AVILA, Suélen Capa de et al. Sunflower meal supplementation to wethers fed sorghum bagasse silage. Cienc. Rural [online]. 2013, vol.43, n.7, pp.1245-1250.  Epub 02-Jul-2013. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84782013005000091.

Six Texel × Polwarth (43.6±4.4kg of body weight (BW)) wethers fed ad libitum sorghum bagasse silage (Sorghum bicolor (L.) Moench ssp. saccharatum) were used in a replicated 3×3 Latin Square experiment to evaluate the nutritional effect of supplementing levels of sunflower meal (0, 7 or 14g kg-1 de BW). In all treatments the urea plus ammonium sulphate (9:1, respectively) solution (8%, p/v) was mixed to silage at feeding at a rate of 50ml k-1g of silage. Total dry matter (DM), organic matter (OM) neutral detergent fibre (NDF) and non-fibre carbohydrates (NFC) intake, as well as DM intake from silage and digestible OM intake were positively affected (P<0.05) by increased levels of sunflower meal supplementation. The NDF digestibility was not affected by treatments whereas the apparent DM and OM digestibility were linearly increased (P<0.05) due supplementation. The efficiency of ruminal microbial protein synthesis was not affected by treatments whereas N intake, digestibility, urinary excretion and retention as well as rumen microbial protein synthesis increased linearly (P<0.05) at increased levels of supplementation. In conclusion, sunflower meal supplementation positively impacts sorghum silage utilization and nutrients supply to wethers.

Palabras clave : biofuel; byproduct; intake; digestibility; microbial protein synthesis; N retention.

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