Uso do licuri (syagrus coronate) moído na alimentação de cordeiros

Abstract

The objectives of this study were to determine the effects the ground licuri in the diets of crossbred Dorper x Santa Inês lambs on its performance and rumen metabolism in two experiments. Experiment 1. The aim was to evaluate intake, apparent digestibility, physical effectiveness NDF, nitrogen balance, microbial protein synthesis, chewing activity, performance, carcass characteristics, and blood parameters of crossbreed x Santa Ines lambs fed increasing levels (0, 5, 10, and 15 % DM basis of the diets) of ground licuri. Forty male lambs (20,89 kg ± 3,97 BW kg) were used in a complete randomized design. The experiment lasted 75 days. The lambs were fed a mixture of Tifton hay (29 %), sisal silage by-products (17 %) and a concentrated mixture (54 %), with 46:54 forage: concentrate rates. The performance was recorded (kg) every 25 days, and the digestibility data were collected between 41 and 45 days. The animals were fed twice daily, at 8:00 h and 16:00 h, ensuring a 10% surplus and water supply was ad libitum, and significance was declared at P≤0.05 for both experiments. The licuri inclusion showed decreased linear effects (P<0.05) on intake of DM and TDN. The intake and digestibility of EE showed increasing linear effect (P<0.05). The apparent digestibility coefficients of DM remained unchanged. The ground licuri inclusion did not affect the nitrogen balance (P>0.05). The MPS and EMPS were affected negatively (P<0.05). The total weight gain, average daily gain, and carcass characteristics decreased linearly (P<0.05). The ground licuri inclusion did not affect the nitrogen balance (P>0.05). The MPS, total weight gain, and carcass characteristics decreased linearly (P<0.05). The chemical, and physical characteristics of longissimus dorsi were similar among treatments. The chewing activity was no affected (P>0.05) and NDF (g) per bolus decreased linearly (P<0.05). The blood urea showed increased linear effect (P<0.05), while the serum glucose decreased linearly (P<0.05). Experiment 2. The objective this study was to evaluate the effects of the supplementation of licuri ground 0; 4; 8; 12 and 16% DM basis on the diets on intake, digestibility, nitrogen balance, MPS, EMPS, ruminal parameters, and blood parameters. Five crossbred Dorper x Santa Ines, non-castrated males ram, with average body weight of 42.5 kg were used in a 5 × 5 Latin square design, with 5 periods of 16 days. The lambs 15 were fed a mixture of tifton hay (26 %), sisal silage (28 %) and a concentrated mixture (47 %) (V:C 53:47). The ground licuri inclusion did not affect (P>0.05) nutrient intake, nutrient digestibility, rumen fermentation parameters, nitrogen balance, MPS, EMPS, and blood parameters. The pH and concentration of NH3-N, acetate, propionate, butyrate, and total VFA, showed quadratic effect (P<0.05) among collection times (0, 2, 4, 6 and 8 hours after feeding). The ground licuri inclusion showed no effect (P>0.05) on the treatments x time interactions of the rumen fermentation parameters. The ground licuri inclusion increased the NDF, EE, and decreased NFC as was included in the diets. The animals responses in these experiments were contradictory and therefore required subsequent studies with NDF adjustments in the diet to determine the appropriate level of ground licuri inclusion.