Abstract
To evaluate the inclusion of common beans in the diet of cattle in feedlot on characteristics of productive performance, nutrient digestibility and ruminal fermentation parameters, 15 bulls crossed were used in a completely randomized design. The animals were confined for 64 days, and 21 days of adaptation. We evaluated the inclusion common beans at levels of 0%, 13% and 26%. All diets were isocaloric and isonitrogenous with a 45:55 forage: concentrate ratio. The addition of beans in the diet did not affect animal performance, dry matter intake and feed efficiency. Inclusion bean changed the nutrient digestibility of DM, CP, EE, TC and OM, where the best digestibility was observed with the inclusion 13% and the lowest concentration of ruminal NH3-N. The general behavior of ruminal pH in relation to levels of inclusion of beans was 6.2. The inclusion of up to 13% of beans in the diet of feedlot cattle did not alter the apparent digestibility, ruminal and animal performance.
Highlights
With the evolution and greater competitiveness of Brazilian agricultural sector, the profit margins for the farmer got even tighter
We evaluated to the Feed Conversion (FC) = dry matter intake (g)/average daily gain (g), Food Efficiency (FE) = average daily gain (g)/dry matter intake (g), and protein efficiency ratio (PER) = average daily gain (g)/protein intake (g)
The levels of inclusion of beans showed no significant difference for the parameters of dry matter intake (DMI), crude protein intake (CPI), TDN intake (TDNI), carbohydrates intake (CHOTI), mineral matter intake (MMI), organic matter intake (OMI) and NDF intake (NDFI)
Summary
With the evolution and greater competitiveness of Brazilian agricultural sector, the profit margins for the farmer got even tighter. [6] characterized the common bean as a product of low acceptability and digestibility, with recommendations for inclusion of up to 15% in concentrates for fattening cattle. The collection of rumen fluid for the determination of pH and ammonia concentration was performed on day 21 of the experimental period.
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