This experiment was carried out to evaluate the forms of phosphorus application, soil sampling and row spacing on critical levels of phosphorus in the soil and shoot for the establishment of elephant grass cv. Napier. The treatments were arranged in three randomized blocks and consisted of five phosphorus levels (0, 1, 2, 3.3 and 5) corresponding, respectively, to 0, 30, 60, 100 and 150 kg/ha P for application on the bottom of the furrow and to 0, 60, 120, 200 […]

The objective of this study was to select superior genotypes in half-sib populations obtained from crosses between sexual plants and apomictic accessions. The experiment also proposed to compare among and within family and combined selection strategies. Ten plots of sexual plants were randomly distributed among 230 plots of apomictic accessions. After natural pollination, seeds of each sexual plant constituted a half-sib family. Thirty plants of each female progenitor were evaluated in a randomized block design experiment, with five plants per […]

The objective of this study was, by using a path analysis of seed yield in white clover, to obtain basic information for use in management strategies for higher seed production and higher natural reseeding and greater persistence of the species in the pasture. The following variables were analyzed: number of flower buds, number of inflorescences, number of mature inflorescences, number of legumes/inflorescence, weight of 100 seeds and seed yield. The variable most correlated with seed yield was the number of […]

The objective of this experiment was to evaluate the susceptibility to aerobic deterioration and dry matter losses of fresh sugarcane and silages with or without chemical additives, and diets composed formulated with these bulks. The experiments were conducted in a complete randomized design with four replications, consisting of fresh or ensilaged sugarcane with calcium oxide or limestone at the level of 1% fresh matter. The aerobic stability was assessed of the bulks and diets by monitoring temperature, pH and dry […]

This trial was conducted aiming to evaluate the effects of Brachiaria brizantha vegetative seed harvest residues hay treated with anhydrous ammonia (NH3) or urea, and protein sources on the steers performance, and carcass quality. Twenty-four male beef cattle were (12 F1 Nellore X Aberdeen Angus and 12 F1 Nellore X Red Angus), distributed in four treatments, with six replications. Animal crossbreed type and initial body weight were considered blocks. The diets were: Untreated hay supplemented with non-protein nitrogen (UHNPN); untreated […]

This study was carried out to evaluate total lipids (TL), cholesterol and fatty acids (FA) in the longissimus dorsi muscle of Bos taurus (n=40) and Bos indicus (n=40) bulls, aged 30-36 months and 240-270 kg carcass weight, finished in the feedlot for 90 days. The total lipids content was similar in both groups. Cholesterol was higher in Bos indicus (66.95 mg/100 g) than in Bos taurus (37.37 mg/100 g). For saturated fatty acids, the means for C14:0 and C18:0 were […]

The objective of this study was to evaluate the influence of the ionophore monensin on the intake, weight gain, feed:gain ratio and withers and croup heights of heifers maintained in feedlot, and also the feeding costs. Twenty eight Holstein heifers were confined individually for 84 days, and fed diets containing 32.84% concentrate (corn grain, soybean meal, urea and mineral mix) and 67.16% corn silage and sugar cane, at the proportion of 1:1 in DM. The ionophore levels added to the […]

Nine ruminally fistulated Nellore steers were located in nine paddocks of palisade grass (Brachiaria brizantha cv. Marandu) pasture under daily supplementation (seven times per week), from Monday to Friday (five times per week) or Monday, Wednesday and Friday (three times per week). Ruminal fluid was sampled on two consecutive days. On the first day, all the animals that were supplemented (D1) and other subsequent day in which only for the animals under daily supplementation received the supplement (D2). The supplementation […]

The use of indigestible dry matter (iDM) and indigestible neutral detergent fiber (iNDF) as internal markers to estimate digestibility in lambs was evaluated. Data and samples were obtained from six independent digestion trials with lambs housed in metabolism cages given ad libitum different forage and concentrate feedstuffs. Indigestible residues were determined after 144 hours of in situ incubation of feed and faeces samples. Recovery rate varied from 64.8 to 108.5% for iDM, and from 49.5 to 67.9% for iNDF. As […]

The objective of this study was to observe the effect of using bypass fat in the diet of Bergamasca ewes on milk yield, milk composition and ewe weight dynamics. Seventy seven ewes were distributed in two homogeneous groups, according to lambing order and age fed a control diet with corn silage and concentrate; or with a control diet with bypass fat (35 g/ewe/day) added to the concentrate. The diets were isoenergetic and isonitrogenous, presenting 16% CP and 70% TDN on […]