Phosphorous application effects were evaluated on ryegrass dry matter (DM) accumulation, root development and plant tissue concentration of phosphorus, nitrogen and carbon aiming to determinate the nutritional status of the pasture, as well as to verify the possibility to establish a phosphorus dilution curve for this pasture. Also, the development of phosphorus and ryegrass cultivated with the residual effect of phosphorus fertilization was determined. The experiment was carried out in Pinhais County – Paraná State on a Cambisol with very […]

Production and quality of milk from dairy cows grazing exclusively on Mombasa grass pasture, during the spring-summer period and fed roughage supplementations, during the autumn-winter, were evaluated in two consecutive years. The pasture of 11.4 ha was divided into 57 paddocks of 2,000 m2 each, including three replications with 19 paddocks each. The pasture was managed with two occupation days and 36 resting days. During the spring-summer period, cows received only grass pasture. In the autumn-winter period, they had access […]

In recent years, the use of microbial inoculants has been increased in Brazil, although the number of trials is still behind the international standards, mainly regarding animal performance data. In corn and sorghum silages studies, homofermentative bacteria represented the exclusive source of inoculants evaluated, which in turn, were also the major inoculant used for tropical grass silages research, whereas in sugar cane silages predominated heterofermentative bacteria. Usually, the application of homofermentative bacteria showed favorable results only for corn and grass […]

The aim of this experiment was to evaluate the effect of tannin on grain over potential degradability parameters of the dry matter and crude protein of six sorghum silage genotypes by in situ technique. It was used four crossbred steers, canulated in rumen, fed ad libitum twice at day with a diet comprised by Cynodon dactylon hay. Six sorghum silage genotypes, harvested at milk stage, were incubated in the rumen: BR 303, BR 304, BR 601, and AG 2006 (without […]

The experiment evaluated the performance of beef heifers submitted to three alternatives of autumn-winter feeding systems, during 88 days, and after this period on improved pastures all together until the end of theirs first mating season, with 14-15 months of age. The systems were: Pasture- continuous grazing on cultivated annual ryegrass (L. multiflorum Lam); supplementation- continuous grazing on natural pasture plus energy and protein supplementation; feedlot – feedlot, with sorghum silage plus non- proteic nitrogen (NNP). After this period, all […]

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 experiment was conducted to evaluate the performance of lactating Holstein cows fed diet with different replacement levels (0, 12, 24 and 36%) of forage cactus (Opuntia ficus indica Mill) for sorghum silage (Sorghum bicolor (L.) Moench). Eight cows were assigned to a two 4×4 latin square design. Each experimental period lasted 21 days, 14 days for adaptation and 7 days for data collection. The intakes of dry matter (DM) in kg/day, % of live weight (LW) and g/kg0,75, organic […]