Experiment was carried out with the goal to evaluate the effect of sodium hydroxide (NaOH) on fiber fraction, tannin level and dry matter in vitro digestibility of jurema-preta hay. Leaves were harvested by hand and dried under shadow. Chemical treatment was done by pulverization of hay with 0; 2; 4; 6 and 8% NaOH solution following the proportion of 1 liter of solution to 1 kg of hay. Samples of hay were submitted to determinations of dry matter (DM), crude […]

It was evaluated the effect of four levels forage cactus in replacement of sorghum silage, in diets of lactating Holstein cows, on the apparent digestibility of dry matter (ADDM), organic matter (ADOM), crude protein (ADCP), ether extract (ADEE), neutral detergent fiber (ADNDF) and acid (ADADF), total carbohydrates (ADTCH) and nonfiber carbohydrates (ADNFC), content of total digestible nutrients (TDN) and apparent absorption of calcium (Ca), phosphorus (P), potassium (K) and sodium (Na). Eight Holstein cows averaging 590 kg and producing 27 […]

This study aimed to evaluate the ammoniation effect on the crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), hemicellulose (HEM), cellulose (CEL) and lignin (LIG) levels and the in vitro organic matter digestibility (IVOMD) coefficient of urea-ammonia treated (4%; dry matter basis) Annonigrass 2 (Eragrostis plana Nees) hay, at five cutting ages (30, 60, 90, 120, 150 days). A randomized complete block design was used, with four replicates in a factorial arrangement (2×5), with two factors: hay […]

The assay was conducted from October 1998 to January 1999 in the cropgrass section of the Universidade Estadual do Norte Fluminense in Campos dos Goytacazes, RJ. The levels of crude protein, neutral detergent fiber, acid detergent fiber, the forage yield and the leaf area index (LAI) were evaluated in 17 genotypes of elephantgrass (Pennisetum purpureum, Schum.), fifteen new clones of elephantgrass: CNPGL 91-19-1, CNPGL 91-10-5, CNPGL 91-27-5, CNPGL 91-02-5, CNPGL 91-01-2, CNPGL 91-13-2, CNPGL 91-25-3, CNPGL 91-10-2, CNPGL 91-02-4, CNPGL […]

Chemical composition and the in vitro dry matter digestibility were evaluated in blades and stems at two stages of development and two insertion levels on tillers of signalgrass (Brachiaria decumbens), molassesgrass (Melinis minutiflora) and tifton 85 bermudagrass (Cynodon sp), in two seasons of the year (summer and autumn). Lower and upper leaf blades were sampled from the tillers, on the day of ligule exposure and 20 days thereafter, and stems segments located below of the upper leaf blade. The crude […]

The trial was carried out from August/1997 to April/1998 to evaluate a Coastcross-1 (Cynodon dactylon (L.) Pers) grazed pasture, under four dry matter residue levels (DMR: 1978; 2130; 2545; 3857 kg of DM/ha), with continuous grazing and variable stocking rate. Chemical composition, as crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents, in vitro dry matter digestibility (IVDMD) and ewes performance were evaluated. A complete randomized design with two replications was used. CP content in forage […]

Ten lactating cows (Holtein and H*Z crossbreed) after 55d calving, with average weigth of 540 kg alloted to a switch-back design, were used in order to evaluate the intake and apparent digestibilities of dry matter (DM), organic matter (OM), neutral detergent fiber (NDF), crude protein (CP), total carbohydrates (TC) and ether extract (EE), the pH and ruminal ammonia concentration and milk yield and composition. The animals were fed ad libitum with diets containing alfalfa hay (AH), coastcross bermudagrass hay (CCH), […]

To evaluate the intake, nutrients apparent digestibilities and nitrogen balance of corn silage, alfalfa and coastcross bermudagrass hays a digestibility trial with sheep was conducted. Fifteen crossbred castrated sheeps, with average live weigth 47.5 kg, were used in a randomized blocks design with four repplicates. The dry matter intake, in g/kg0.75, was influenced by feed and the higher value (68.06) was observed in animals fed with alfalfa hay. The ether extract and neutral detergent fiber intakes were smaller for animals […]

The objective of this work was to evaluate the effect of different sward heights (8.9, 10.0, 11.2, 11.8; 13.3; 13.6; 14.6; 18.2 cm) in the mixture of black oat IAPAR 61 (Avena strigosa Schreb cv IAPAR 61) + field pea (Pisum arvense L.), under grazing, on leaf/stem ratio (L/S), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents and dry matter (DMIVD) and of organic matter (OMIVD) in vitro digestibility. A completely randomized experimental design with […]

The intake, total apparent digestibility and ruminal and intestinal apparent digestibilities of diets containing tifton 85 bermudagrass hays (Cynodon spp.) at different regrowth ages were evaluated with cattle. Four rumen and abomasum fistulated steers were allotted in a 4×4 Latin square. All diets consisted in 0 to 40 forage to concentrate ratio. The forage was consisted in Tifton 85 bermudagrass hay of 28, 35, 42 and 56 days of age, and the concentrate contained corn meal and mineral mix. The […]