Consumo de nutrientes e comportamento ingestivo de cordeiros alimentados com dietas a base de silagens de grão de milho reidratado

Abstract

The objective was to evaluate the consumption of nutrients and ingestive behavior of feedlot lambs fed diets containing rehydrated grain silage maize. The experiment was carried out on the Rancho João Marcos farm, located in the municipality of São José dos Cordeiros, Paraíba. Thirty-nine uncastrated, undefined breed male lambs with an average initial weight of 22 ± 4.29 kg were used. The experimental design used was completely randomized, with three treatments and 13 repetitions, totaling 39 experimental units. The diets were composed of sorghum silage and concentrate feeds, the treatments represented in different ways in the diet of maize T1: dry ground corn grain; T2: corn grain silage rehydrated with water; T3: corn grain silage rehydrated with forage cactus. There was no effect of diets on dry matter intake (P=0.9564), organic matter (P=0.8504), mineral matter (P=0.7079), crude protein (P=0.7379), extract ether (P=0.4546), neutral detergent fiber (P=0.5106), non-fibrous carbohydrates (P=0.3485) and total carbohydrates (P=0.7109). The diets provided did not interfere with rumination (P=0.1310), feeding (P=0.5836), idle (P=0.0541) and activity (P=0.3196) times. For feeding efficiency as a function of neutral detergent fiber and dry matter, averages between diets of 41.59g/h and 149.71g/h, respectively, were obtained, with no significant difference. For rumination efficiency as a function of neutral detergent fiber and dry matter there was also no variation, with mean values of 31.56 and 113.12g/h, respectively. The use of diets containing corn grain silage rehydrated with water or forage palm did not interfere with nutrient intake and ingestive behavior of confined lambs, when compared to diets containing non-hydrated corn grain.