The objective of this work was to evaluate the effect of different sward heights (8.9, 10.0, 11.2, 11.8; 13.3; 13.6; 14.6; 18.2 cm) in the mixture of black oat IAPAR 61 (Avena strigosa Schreb cv IAPAR 61) + field pea (Pisum arvense L.), under grazing, on leaf/stem ratio (L/S), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents and dry matter (DMIVD) and of organic matter (OMIVD) in vitro digestibility. A completely randomized experimental design with […]

The objective of this work was to study the quantitative and qualitative carcass and meat characteristics of Charolais (C) and 3/4 C 1/4 Nellore (N) cull heifers. Twenty-five culled heifers, three years old, were feedlot finished per 80 days period. No significant difference was observed for slaughter weight (473.6 vs. 468.8 kg), cold carcass weight (241.8 vs. 241.8 kg), dressing percentage (51.09 vs. 51.61%), fat thickness (4.13 vs. 4.78 mm), forequarter percentage (35.52 vs. 36.01%), sidecut percentage (15.03 vs. 15.42%), […]

Using a linear statistical model (GLM/SAS) the reproductive performance and growth of 480 Nellore heifers were evaluated from the age of 7.5 to 17/18 months under four feeding systems during the dry period (96/05 to 96/10): Brachiaria brizantha cv. Marandu pasture (B); Brachiaria brizantha cv. Marandu pasture + Anipro (BA); Pennisetum americanum cv. (L.) Leeke (Pearlmillet) (M) and Brachiaria brizantha cv. Marandu pasture + Sal Ouro (BS). At the end of supplementation all heifers were moved to a paddock of […]

The objective of this research was to evaluate the effects of two experimental periods and two forage levels in the diet on the total and parcial apparent digestibility of dry matter (DM), organic matter (OM), crude protein (CP), acid detergent fiber (ADF), neutral detergent fiber (NDF), gross energy (GE) and starch. Four Holstein steers, averaging two years old and 340 kg of body weight, ruminally and duodenally cannulated, were used. The experimental design was a 4 x 4 latin square […]

This experiment was conducted at the Brasília Agricultural College – Federal District, and studied the dynamics of appearance and death of tillers as well as leaf elongation in three positions of the stump (central, intermediate and peripheral) of Paspalum atratum cv. Pojuca, submitted to four rotational grazing cycle of 10 days use and 30 days resting. A descriptive analysis was applied using a hierarchical model. Nitrogen was applied at a rate of 40 kg/ha, in the form of ammonium sulfate […]

This work was conducted aiming to evaluate the effect of the addition nicarbazin and lysine levels in the diet of broilers from 1 to 21 days of age and its residual effect on the period from 22 to 49 days of age. The broilers were created in high environmental temperature. Four hundred and eighty male broilers Ross brand were used, in a completely randomized experimental design, in a 2×4 factorial arrangement (addition or not of nicarbazin and level of lysine), […]

The experiment was conducted to evaluate the performance of beef heifers with average age of ten months and average initial weight of 200 kg, grazing cultivated annual temperate grasses mixtures supplemented with salt plus lasalocid or salt. Spread sowing ocurred on 04/21/95, being the area fertilized with 200 kg/ha of 05-30-15. Nitrogen fertilization in the form of urea (175 kg/ha of N) was subdivided in four applications. The establishment of the pasture occured from 04/21 to 06/08 and the experimental […]

The apparent metabolizable energy (AME) and nitrogen corrected apparent metabolizable energy (AMEn) values were determined and energy prediction equations obtained using the chemical composition of 11 feedstuffs. The feedstuffs evaluated were: brown flour meal, wheat flour, wheat grain, wheat grain residue, wheat germ, cookies residue, macaroni residue and, four wheat brans. Total excreta collection method was used, with 480 broiler chicks, 16 to 24 days old. A randomized complete design was utilized, with 11 feedstuffs and a basal reference diet, […]

Two experiments, using 8 to 18 days old Avian -Farm male broiler chicks, were conducted to evaluate the effect of microbial enzymes on the ileal digestibility coefficient (DC) of dry mater (DM), crude protein (CP), energy (E), calcium (Ca) and phosphorus (P) in corn soybean meal diets with different level of Ca and available P (Pa). Chromic oxide (0,5%) was added to the diets, as an indigestible marker, to estimate ileal digestibility. All chicks were killed at the end of […]

The experiment was conducted from October 1997 to April 1998, to evaluate the nonstructural carbohydrates (SC), total nitrogen (TN) and roots weight, of the pasture of Coastcross – 1 (Cynodon dactylon (L.) Pers), under four levels of dry matter residue (DMR: 1978, 2130, 2545 and 3857 kg DM/ha), under continuous stocking (put and take). A completely randomized design, with two replications, was used. SC and TN contents were analysed on roots and stem base according to dry matter residue levels […]