Impact of cattle-feed supplementation including agro-industrial remnants in multinutrient blocks in the province of Otuzco, La Libertad region.

Abstract

The objective of this research was to determine the impact of cattle-feed supplementation including agroindustrial remnants in multinutrient blocks. For that purpose, the study design was a descriptive-experimental type and 16 creole cows shepherded with a predominant for of Brachiaria brizantha, which were milked daily were considered for the sample. Then, the cows were divided into two groups of 8 cows each (group A and group B) showing an average production of 4.16 +/- 0.75 y 4.02 +/- 0.96 kg of milk per day. To evaluate the supplementation effect two treatments were worked: (T0) means, under-grazing without supplementation, and (T1) means, under-grazing with supplementation of MNBs (multinutrient blocks). Likewise, the used agro-industrial remnants were: Broken rice, powdered rice, and mango paste. The elaboration of this balance feed consisted of 4 stages: Weighing, Mixing, Pressing, unmolding and drying. Then, the agro-industrial remnants, the final product and milk were taken to the laboratory of the National University Federico Villareal to determine their nutritional composition. The obtained results were subjected to an analysis of variance (ANOVA) by using the adjusted test of Duncan (α =95%). The results showed that the MNB protein content (33.7%) and fiber (12.5%) surpassed the traditional forage. With respect to the milk composition existed significant differences between both treatments in terms of protein percentage and lactose, in contrast to, milk production where no variation was showed. Hence, the supplementation of the MNBs with agro-industrial remnants had a positive effect with respect to the nutritional composition compared to the traditional forage and milk produced from the use of this supplement, without influencing the milk production levels.