The objective of the experiment was to evaluate, through feedlot performance of calves, three corn hybrids (Zea mays, L.): Agroceres AG-5011, Braskalb XL-344 and Cargill C-806. For the evaluation, 27 Nellore x Charolais non-castrated crossbred males with average age of 10 months and average initial weight of 252 kg, were used. The animals were fed during 84 days, divided in four periods of 21 days. The hybrids silages tested represented 70% of the dry matter offered. No significant interaction of […]

This work was carried out to study the effect of dry matter feed intake level (DMI/% BW), weight gain, production and viability of embryos in cross-breed heifers so does production and viability of embryonic structures in Nellore cows. During the first trial, 27 cross-breed (½ Nelore x ½ Simental) heifers were used divided in 3 treatments and 9 replications: 1.2%; 1.6% and 2.6% of DMI/day in relation to body weight, respectively. The heifers were synchronized and after nine days these […]

The experiment was carried out to evaluate increasing crude protein (CP) levels in drylot lambs diet, and its effects on animal performance. Thirty two tricross lambs (1/2 Texel + ¼ Bergamácia + ¼ Corriedale), being 16 males and 16 females, with average age 5 months and live weight 30 kg, were fed for 57 days, with isoenergetic diets (72% TDN), but with different protein levels (12, 16, 20 and 24% PB). The animals were identified, weighted and distributed in the […]

The experiment was conducted with the objective to evaluate the performance of feedlot finished calves, fed with silages of AG-5011 corn hybrid harvested with different cutting height: low cut (20 cm) and high cut (42 cm). Twelve Braford calves with an average age of seven months and average live weight of 209 kg, were used. The feedlot period was 126 days, divided in two periods of the 63 days. The roughage:concentrate ratio was 60:40 and 50:50 for the first and […]

The experiment was conducted with the objective to evaluate the parameters of dry matter intake, weight gain, feed conversion and energy efficiency of young feedlot steers, fed with two diets that included the AG-2006 sorghum silage harvested with different cutting heights: low cut (14 cm) and high cut (45 cm). Twelve Braford calves with an average age of seven months and average live weight of 208 kg, were used. The feedlot period was 126 days, divided in two period of […]

The trial was carried out in a Tanzania grass (Panicum maximum) pasture, rotationally grazed by lactating cows, to estimate the dry matter intake. Three treatments were tested: crossbred cows fed 3 kg per day of concentrate and crossbred and Zebu cows (Gyr) without concentrate supplementation. The forage availability was 7,340.2 kg of dry matter (DM) /ha before and 5,639.5 after the 3rd grazing day. The Tanzania grass DM intake was 8.26 ± 5.66, 11.01 ± 5.37 and 9.55 ± 2.31 […]

Feedlot parameters of two categories of cull females, cows and heifers, fed two diets, with and without monensin, were studied. The daily amount of monensin supplied was 150 mg/animal. The roughage:concentrate ratio was 65:35. The roughage used was sorghum silage. The inclusion of monensin to the diet caused a significant reduction of the daily voluntary dry matter intake (DDMI), which was more pronounced for the cows (9.1%) than for the heifers (1.7%). The animal category x diet interaction affected significantly […]

The experiment was conducted to evaluate the parameters of dry matter intake, weight gain, feed conversion and energy efficiency of feedlot steers, fed with four diets that included silage of hybrids of sorghum with different agricultural behavior: AGX-213 and AG-2002 (forage), AGX-217 and AG-2005E (double purpose). Forty-eight steers with an average age of 19 months and average live weight of 316 kg, were used. The roughage:concentrate ratio was 63:37, for all the diets tested. No significant interaction was observed between […]

Effects of monensin supplementation on the performance, the carcass characteristics and the composition and the partial economic analysis, were evaluated in a 120-d trial, using 20 Holstein bulls calves, with average weight and age of 90.8 kg and 80 days, respectively. The treatments consisted on different levels of monensin (0, .4, .8, and 1.2 mg of monensin/kg LW). Results with the increase of the monensin levels were observed for weight gain (1.064, 1.312, 1.372, and 1.252), dry matter intake (4.158, […]

ABSTRACT – Daily dry matter intake (CPUPV), feed:gain ratio (CONV) and average daily gain (ADG) of 80 Charolais (Ch), Caracu (Ca) and reciprocal crossbred (ChCa and CaCh) males were analyzed. The ChCa and CaCh were generated by rotational Ch x Ca crossbreeding. All animals were fed in individual stalls for 76 to 97 day periods receiving corn silage ad libitum and a concentrate containing 17.8% CP and 79% TDN fed 1% LW/animal•day. The three traits were analyzed first as a […]