The objective of this experiment was to evaluate the animal productivity and economic return of the use of urea or ammonium sulfate for fertilization of oat (Avena strigosa Schreb) plus ryegrass (Lolium multiflorum Lam.) pasture. The pasture was established on 04/21/94 and the grazing period occured from 06/05 to 11/06/94. The continuous grazing method with variable stocking rate was used. The animals used were beef heifers, with 10 months of age. The amount of nitrogen used was 200 kg/ha, subdivided […]

The experiment was carried out to evaluate the use of Leucaena leucocephala and Cajanus cajan as protein sources, during the dry season for lambs grazing on buffel grass pastures. Nine experimental treatments resulting from the combination among three types of pasture (buffel grass, buffel grass+Cajanus cajan, and buffel grass+leucaena) and three stocking rates (4, 6 and 10 lambs/ ha) were tested. Eighteen paddocks (two replicates of pastures per treatment) of 0.5 ha were used. Sixty lambs with 19.4 kg live […]

The objective of this work was to evaluate the dry matter (DM) yield and chemical composition of furachão grass (Panicum repens L.) at different cutting ages (15, 30, 45, 60 and 75 days), with and without fertilization. For the yield analysis and chemical aanalysis composition, a completely randomized block design in a 5 x 2 factorial arrangement (cutting ages and fertilization levels), with three replicates, was used. Fertilization increased DM produced and reduction in the DM contents. The crude protein […]

Four cultivars of Panicum maximum: Mombaça, Tanzânia, Centenário and Vencedor were grown in pots, under a transparent plastic cover, to evaluate the dynamic of leaf and tillers growth. Two growths, the establishment and the aftermath, after clipping at the age of 21 days, and two types of tiller, main and primary tillers, were studied. A completely randomized design with four replicates was used to compare the treatments resulting from a 4 x 2 x 2 factorial arrangement. The leaf blade […]

A 40 days alfalfa (Medicago sativa) regrowth was harvested in the summer at the early flowering stage with (26.3% DM, 18.94% CP, 8,90% DM soluble carbohydrates and 43.35 meq OH–/100 g DM buffering capacity). Part of the material was direct cut ensiled (26.3% DM) and part was wilted for 20 hours (44.12% DM). Both silages, either wilted or not, were assigned to four treatments: Control, Enzymes, Inoculate and Inoculate plus Enzymes and were ensiled in laboratory silos (3.6 L), with […]

Fifteen reproductive, 22 vegetative and 21 agronomic descriptors were evaluated, the agronomic ones comprised seven descriptors for annual, winter and summer evaluations, respectively, with the objective to select the most appropriate descriptors for characterization of Paspalum guenoarum and Paspalum plicatulum. Principal components analysis was used to discard redundante or non-discriminative descriptors. The principal component analysis allowed a reduction of 53, 68 and 43%, respectively, in the number of initial descriptors considered. By means of this technique, it was possible to […]

ABSTRACT – The experiment was conducted to evaluate the animal production and the economic result of the mixtures of oat + ryegrass (MOR), triticale + ryegrass (MTR), rye + ryegrass (MRR) in continuous grazing. Beef heifers with seven months of age and initial 140 kg LW were used. The sowing was broadcast at 04/12/96, using 85 kg/ha of oat, 170 kg/ha of triticale, 140 kg/ha of rye and 30 kg/ha of ryegrass, in the respective mixtures. The area was fertilized […]

ABSTRACT – This experiment was conducted in an elephant grass pasture from EMBRAPA/CNPGL to compare methods for estimating forage availability, as well as to evaluate the accuracy of three observers in the evaluations. The cutting, plant height, ground cover and height x ground cover methods, multiple regression analysis and the visual comparative yield were compared with the total productions in respective half of evaluated area. The visual comparative yield method always provided the highest coefficients of determination of estimating equations, […]

ABSTRACT – This experiment was conducted to evaluate the total dry matter (DM) production, leaf/stem ratio, percentage of leaf and stem and nutritive value of the elephantgrass (Pennisetum purpureum Schum.) cultivar Roxo under four cutting ages (40, 60, 80 and 100 days) from July of 1994 to December of 1995 in the wet land region of the Paraíba State. The cultivar was stablished in plots of 3,0 x 5,0 m and plant spacing of 0,70 x 0,80 m, using a […]

ABSTRACT – The tissue proportions, the degree of simple linear correlation of this characteristics with the in vitro dry matter disappearance (IVDMD) and their chemical composition were determined in transversal sections of the botanical fractions, leaf blades and sheath and stem sampled from the top and bottom tillers of dwarf elefantgrass (Pennisetum purpureum, Schumach cv. Mott, setariagrass (Setaria anceps, Stapf ex Massey cv. Kazungula)) and jaraguagrass (Hyparrhenia rufa, Nees Stapf). The jaraguagrass, with high percentage of parenchyma bundle sheath (PBS) […]