This work had as objective to validate the computer program of Sistema Viçosa de Formulação de Rações, as well as the 1996 beef NRC, including levels 1 (NRC system) and 2 (Cornell System) for growing beef cattle under pastures. The data of daily gain predicted by the programs as a function of body weight, genetic groups and supplements composition and intake during the dry season were compared to the observed values. The levels 1 and 2 of NRC system underpredicted […]

A good establishment is an important condition to obtain adequate levels of productivity in elephantgrass pastures. However, besides the adoption of good agronomic practices at planting, it is necessary to assure that the post-planting management is correct, to favor the future productivity and persistence of the pasture. Aiming at obtaining a good initial density of elephant-grass in the pastures, various post-planting management systems were studied. The following treatments were compared: grazing three months after planting, followed by cutting at 20 […]

Adesmia latifolia is a forage legume native from Southern Brazil which is outstanding due to stoloniferous growth habit and for forage production during the cool season. The Lotus corniculatus (birdsfoot trefoil) is a forage usually utilized as cool season species in subtropical and temperate regions. For both species, however, there is a reduced number of scientific works related to the nodule type and biological nitrogen fixation (BNF). This work had the purpose to analyze such processes in these species and […]

ABSTRACT ¾ The contents of Mn, Fe, Zn, Cu, Co, Mo and Pb of soil, predominant forage in the pastures and water, were studied in the North and Northwest regions of Rio de Janeiro State, during the dry (June-July) and rainy (December-January) seasons. Samples of soil, forage and water were collected in 12 different points of the regions, in predominant grazing areas, as determined by satellite photograph and according to different soil characteristics. The mineral contents of the sample extracts […]

The amount of Ca, P, Mg, K and Na of the soils, and the levels of these elements and S of the forages predominant in the pastures and water, were studied in the North and Northwest regions of Rio de Janeiro State, in the dry (June-July) and rainy (December-January) seasons. Samples were collected from soil, forages and water from 12 different places of the regions, in predominant grazing areas, as showed by satellite photography and according to different soil characteristics. […]

The levels of organic matter and aluminum and the pH of the predominant soils in the North and Northwest regions of Rio de Janeiro State were studied during the dry (June-July) and rainy (December-January) seasons of the year. Samples of soil were collected from 12 different places of the regions, in predominant grazing areas, as determined by satellite photography and according to different soil characteristics. The aluminum contents of the sample extracts were determined by spectrometry, on an inductive plasma […]

ABSTRACT – With the objective to increase the germoplasm availability for forage production, 215 accessions of the genus Paspalum collected in different regions and introduced at the Embrapa Southeast – Cattle Research Center, located at the central region of the São Paulo state. These accessions were evaluated and selected based on their yields in the first year, of dry matter from the vegetative development throughout the year and during the period of high and low rain preciptation. The accesses were […]