In a degraded pasture of Tobiatã grass (Panicum maximum Jacq cv. Tobiatã), in Pirassununga – SP, an experiment was carried out to observe the effects of levels and types of limestone with or without incorporation on the tillering, ground cover and pasture productivity during six cuts from 1996 to 1997. There was no response in the dry matter yield to by the levels and types of limestone, however the practice of limestone incorporation using harrow was effective, and based in […]

The adequacy of the recommendation of phosphorus for growing Nellore steers was evaluated by means of the weight gain, feed intake and feed:gain ratio during 250 days. Fifteen steers were fed a basal P-deficient but otherwise adequate in the other nutrients, enabling gains of 500 g/day. The diet was supplemented (treatment 1 = 15 g P/day, treatment 2 = 11 g P/day) or not (treatment 3 = 5 g P/day) with monoammonium phosphate. Phosphorus deficiency did not affect organic matter […]

The experiment was conducted to evaluate the effect of energy supplementation on the performance of finishing cull cows under temporary grazing on triticale plus ryegrass. The energy supplement was ground sorghum in the levels of 0, .3, .6 and .9% of the live weight. Forty Charolais cull cows were divided in age classes and randomly distributed on the supplementation levels. No interaction was observed between age of the cow and supplementation level. The increase of supplementation level did not affect […]

Data of 109.200 lactations were used to verify the effects of heterogeneity of variance on genetic evaluation of cows and bulls of Holstein breed raised in Brazil. Total milk production adjusted for adult age was used to classify the herds among three classes of phenotypic standard deviation: Low (<1427 kg), medium (between 1427 kg and 1625 kg) and high (>1625 kg) classes. Records from the first lactation were analyzed for total milk production adjusted for adult age (TOTAJU) and for […]

The effect of different dietary concentrate levels (25, 37.5, 50, 62.5, and 75%) on the carcass characteristics, gastrointestinal tract weight, internal organ weight and gastrointestinal tract fill was evaluated. Twenty-four F1 Simental x Nellore bulls, with 17 months of age and average live weight of 354 kg, were used. The animals were slaughtered when reached 500 kg of live weight. After cooling, carcasses were qualitative (loin eye area) and quantitatively (measures, yields and prime cuts) evaluated. The carcass and prime […]

This research was carried out to evaluate the inbreeding effects and its possible influence on the beef cattle growth. Data with 27,406 observations of weaning weight, standardized to 205 (WW), and 14,317 observations of yearling weight, standardized to 365 days (YW), from Gyr breed animals, from 1970 to 1995, were used. The analysis were made using the least square method that included the random effect of contemporary group and the fixed effects of generation (class), age of cow at calving, […]

A field plot experiment was conducted in the Instituto de Zootecnia, Nova Odessa-SP, in a split plot design with 12 replicates, to compare, in the grasses marandu (Brachiaria brizantha Stapf. cv. Marandu), setaria (Setaria sphacelata cv. Kazungula) and tanzania (Panicum maximum cv. Tanzania-1): dry matter yield, dry matter percentage, sward height, leaf blade percentage, apical meristem height, in cuts at 35 days of growth, in the spring (21/11 to 25/12/97), summer (29/12/97 to 02/02/98), fall (13/04 to 18/05/98) and winter […]

The experiment was carried out to evaluated the reproductive traits of crossbred goats submitted to the semi-arid Notheast climate conditions. Data from 657 does kept in a native pasture and fed corn and soybean meal based diet, during the dry season, and 945 kids milked up 24 hours, were analyzed. The means for the does prolificacy and at kidding weight were respectively 1.69+.03 and 36.38+.03 kg for ½ Pardo Alpina (PA) + ½ Moxotó (MO), 1.59+.05 and 36.24+0.58 kg for ¾ […]

In order to increase the sugar cane bagasse digestibility, this agricultural by-product was treated with several chemical reagents with or without physical treatment. After preliminary evaluation, where several delignificant agents were evaluated, ten treatments were selected for more detailed in vitro dry and organic matter disappearance trials. Then, for the in vivo digestibility trial, four sugar cane bagasse based diets were made: 1 – Hydrolyzed sugar cane bagasse, pressure of 17 kgf/cm2 per 5 min; 2 – Bagasse treated with […]

The lignin extracted from the forages by the acetyl bromide reagent (acetyl bromide lignin – AcBrL) to be used as a reference standard for the quantitative spectrophotometric determination of lignin could not originate from intact plant because of interference of other substances, which absorb ultraviolet light at the same wavelength of lignin. It is then recommended that lignin extraction be performed in one of the following materials: cell wall itself (CW), neutral detergent fiber (NDF), or acid detergent fiber (ADF). […]