The objective of this research was to evaluate the effects of different crude fiber and soybean oil levels in diets for Tilapia Nile. Twenty-four circular fishbowls of 250 liters, with an individual system of water replenishment and heating, were used. The stocking rate was of seven fishes/fishbowl, totalizing 168 fishes, with average initial weight of 6.41±0.05 g. Weight gain, apparent feed:gain ratio, specific growing rate and protein efficiency rate were evaluated. The chemical composition and carcass yield, eviscerated carcass and […]

The objective of this study was to evaluate, in purified diets, the effects of different levels of crude fiber on the apparent digestibility and gastrointestinal transit rate in Nile Tilapia. Five circular fishbowls (250 L) with a closed system of water filtering, replenishment and heat for feeding and five digestibility fishbowls with individual filtering replenishment and heat system were used. Thirty-two fishes, averaging initial weight of 30.65 ± 0.50 were used. A completely randomized design with five levels of crude […]

Two experiments were carried out aiming to compare techniques of digestibility of fish food nutrients, by using external indicators (chromic oxide and barium carbonate), internal indicators (HCl-insoluble ash, acid detergent insoluble ash, crude fiber and acid detergent fiber) and the direct determination technique. Corn meal was used in the first experiment and soybean meal was used in the second one; both used 100 g tambaquis. Chromic oxide and barium carbonate are effective external indicators for estimating the digestibility coefficients of […]

An experiment was conducted to study seed dormancy (hardseedness) in seventeen genetic lines and three commercial cultivars of pigeon pea. The seeds were hand-harvested, hand-shelled, and stored in paper bags in a chamber with 10°C and 25% air relative humidity. Four replications of fifty-seed samples were put to germinate in moist paper rolls at 30ºC, after one, two, three, four, five, nine, twelve and fifteen months of storage. No hard seeds were observed among eight lines and the three commercial […]

The purpose of this work was to morphologically characterize and describe the vegetative cycle of eleven previously selected pigeon-pea lines submitted to self pollination, selection and multiplication, to obtain pure lines. All descriptions were accomplished through the use of internationally accepted descriptors for the species and it was concluded that all eleven lines can be easily distinguished by means of their morphological traits.

An experiment was carried out at to evaluate the fermentation pattern and chemical-bromatologycal composition of fresh and wilted Ipomoea glabra Choisy and Jaquemontia asarifolia L.B. Smith silages. To evaluate the fermentation pattern silos were open in 3, 7, 14, 21 e 28 days of fermentation. The used design was completely randomized in split-plot to the fermentation pattern; and factorial outline 2 X 2 with four reapplication to the chemical analysis. In the material before ensiling were determined pH values, NH3-N […]

This experiment was established in greenhouse at Embrapa Clima Temperado, Pelotas, RS, with the objective to evaluate the effects of different doses of phosphorus and potassium on dry matter production of aerial biomass and roots, length of above ground parts and roots and efficiency and score of nodulation of three cool season annual forage legumes. The treatments were five doses of P (0,0; 1,08; 2,15; 3,23 e 4,30 mg de P2O5/dm3) and K (00,0; 0,43; 0,85; 1,28 e 1,70 mg […]

This experiment was established in a greenhouse at Embrapa Clima Temperado, Pelotas, RS, with the objective to evaluate the effects of increasing doses phosphorus (P-P2O5) and potassium (K-K2O) on crude protein (CP), acid detrgent fiber (ADF), neutral detergent fiber (NDF) and minerals (P,K,Ca and Mg) contents of dry matter (DM) in three species of forages legumes. The three cool season annual legumes forage used were: persian-clover (Trifolium resupinatum L. cv. Kyambro), subterraneum-clover (Trifolium subterraneum L. cv. Woogenellup) and Lotus El […]

Part of the fertilizer nitrogen (N) applied to pasture may be lost from the system and, in tropical pastures, the volatilization of ammonia (NH3) is one of the major pathways of loss. The present study aimed to estimate the NH3-N volatilization loss in Panicum maximum cv. Tanzania pasture fertilized with urea during the summer. A completely randomized design, following a repeated measure arrangement, with three replicates was used. The plots were represented by urea levels (40, 80 and 120 kg/ha […]

The research was carried out in a greenhouse, at the UFRPE, from October 2000 to May, 2001. The objective was to evaluate the effect of phosphatic fertilization and harvest systems on the chemical composition and in vitro digestibility of the “capim-de-raiz” (Chloris orthonoton Doell). The treatments was obted in a factorial arrangement 3 x 2 x 2, with three rates of phosphorus fertilizer (0, 100 and 200 kg ha-1 of P2O5), two cut frequencies (30 and 40 days) and two […]