Massa seca e composição bromatológica de quatro espécies de braquiárias semeadas na linha ou a lanço, em consórcio com milho no sistema plantio direto na palha

The objective of this research was to evaluate the dry mass yield and chemical composition of four Brachiaria species in different options for sowing, exclusively or in intercrop with corn crop, under a no-tillage system. The experiment was carried out during the growing seasons of 2006 at FEPE (FE/Unesp, Ilha Solteira Campus) located in Selvíria, Mato Grosso do Sul State, Brazil. The soil of the experimental area was classified as distroferric Red Latosol (Oxisol). The experimental design was in randomized blocks, in a factorial scheme (4 × 4), with five replications. The treatments consisted of four Brachiaria species (Brachiaria brizantha cv. Marandu, Brachiaria decumbens, Brachiaria ruziziensis and Mulato II grass) grown in rows and spread on total area, exclusively or intercropped simultaneously with corn crop sowing. The study evaluated the dry mass yield and total digestible nutrients, crude protein, ash, neutral detergent fiber, acid detergent fiber, hemicelluloses, cellulose and lignin content of forage. The spread on total area intercrop of forages with corn crop proved to be viable by presenting similar dry mass yield to exclusive sowing arrangements, conversely to what happened with intercrop in row of corn crop, which decreased such yield. Brachiaria ruziziensis showed superior chemical composition and the intercrops increased energy and crude protein contents, and decreased cell wall components.

Dry matter yield and nutritional value of Marandu grass under nitrogen fertilization and irrigation in cerrado in São Paulo

The aim of this study was to evaluate dry matter yield and nutritional value of palisade grass (Brachiaria brizantha cv. Marandu) using nitrogen doses and sprinkler irrigation in two periods of the year, aiming at reducing seasonality of forage production. It was used a randomized block design in a split-plot scheme, with five doses of nitrogen (0, 50, 100, 150, and 200 kg/ha/cut), and the sub-plots were defined by the seasons of the year (wet and dry season), with and without irrigation. During the wet season, in the plots with and without irrigation, doses of 175 and 161 kg/ha/cut promoted the highest dry matter yields. During the dry season, 171 kg ha -1N with irrigation resulted in the highest dry matter yield. During the same season, there was no response to N fertilization in the lack of irrigation. Average contents of CP were 10% with and without irrigation. Contents of neutral detergent fiber decreased with nitrogen doses, while acid detergent fiber was not affected by fertilization. Plots under irrigation reached the maximal acid detergent fiber content at N dose of 60 kg ha -1. Irrigation promotes increase of 15% increase in dry matter yield and it increases contents of neutral detergent fiber. © 2010 Sociedade Brasileira de Zootecnia.

Indicadores na estimativa do fluxo de digesta em bovinos de corte

single and double marker methods were compared in seven Nellore steers with average body weight 250 kg, and previously canullated in the rumen and duodenum. The animals were fitted with continuous-infusion pump that administered CoEDTA solutions intraruminally. In addition, a capsule containing Cr 2O 3, and other, containing external n-alkanes C 32, C 36 were inserted into the rumen of each steer. Internal markers indigestible neutral-detergent fiber and acid-detergent fiber (iNDF and iADF after 144 h in situ incubation) and internal n-alkanes C 31, C 33, C 35 were components of the diet. Steers were fed with palisade grass (Brachiaria brizantha cv. marandu) in two age of regrowth, 30 and 60 days. The duodenal flow experimental design was a factorial 2×2×12 while omasal experimental design was a factorial 2×2×4. Markers iNDF, CoEDTA and the combination Co+iNDF were efficacious to estimate duodenal dry matter flow whereas iNDF, iADF and the Co+iADF combination were all efficacious to predict omasal dry matter flow. In conclusion, the double marker method for estimation of omasal and duodenal dry matter flow was the most appropriate considering the ruminal fiber digestibility.

Consumo, digestibilidade aparente e balanço de nitrogênio em ovelhas alimentadas com diferentes níveis de fibra em detergente neutro

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Fezes equina como fonte de inóculo na obtenção de indicadores indigestíveis para estimar a digestibilidade em equinos

Four castrated horses were utilized in randomized blocks experimental design. The objective was to study the in vitro acquirement of indigestible fiber, neutral detergent fiber (NDFi) and acid detergent fiber (ADFi), using as inoculum source rumen fluid (RF) or horse feces (HF), to estimate the nutrient digestibility (ND) in horses. Treatments consisted of direct method by total feces collection (TC) and indirect method either by the use of NDFi or ADF by the use of LR or HF as inocula source. The first essay was done with horses fed coast-cross hay exclusively, while for the essay two, the horses were fed of 70% of coast-cross hay and 30% corn grain. For the essay 1, ADFi-HF presented the best marker recuperation rate (RR) (103.67%), being similar to control (TC), while NDFi-RF and ADFi-RF resulted in lower RR (P<0.05), 83.43 and 88.28%, respectively. The ND was adequately estimated by NDFi-HF and ADFi-HF. On the second essay there were no significant effects of the marker type, as well as for the indigestible marker acquirement method, for the marker RR (average value of 101%). The ND was adequately predicted by the ADFi obtained for both innocula source and NDFi obtained by the use of HF as inoculum, for horses fed a mixed diet. It can be concluded that horse feces may be used as inoculum source for the acquirement of NDFi and ADFi in vitro for digestibility determination on horses fed coastcross hay exclusively, as well as for horses fed a mixed diet.

Composição química e degradabilidade ruminal de silagens da cana-de-açúcar tratada com aditivos químicos e bacteriano1

The objective of this trial was to evaluate the effect of the addition of chemical and bacterial additive in the ensiling of sugar cane (Saccharum officinarum L.) on chemical composition, pH, kinectic fraction and in situ degradation of nutritions components of silages. Five rumen-cannulated 1/2 Simental + 1/2 Zebu steers were allotted to a completely randomized design. The steers were placed in individual cages and they were fed with diets with 76% forage (%DM). Five silages were evaluated: control - sugar cane, no additives; urea - sugar cane + 0.5% of urea (wet basis); inoculant - sugar cane inoculated with LactoSilo® (390 g/40 t forage); NaOH - sugar cane + 1.0% of sodium hydroxide (wet basis); CaOH - sugar cane + 0.6% of calcium hydroxide (wet basis). The silage additives with sodium hydroxide showed the highest pH values before (11.20) and after (4.87) for silage. No differences were observed among the silages for dry matter (26.85), crude protein (5.25) and acid detergent fiber (57.21). Fractionation of dry matter and organic matter of silages showed similar behavior, with higher values of the soluble fraction (fraction A) for silages with sodium hydroxide (45.86 and 30.95%) and calcium hydroxide (29.47 and 26.13%). The use of sodium hydroxide allowed obtaining higher values for the degradation of cell wall components of silages from cane sugar. The potencial and effective degradability with 3, 5 and 8%/h of passage rate were respectively 88.44, 64.45, 56.73 and 49.83% for NDF and 82.57, 55.51, 46.72 and 38.83% for ADF, indicating that the use of sodium hydroxide as chemical additives can improve the nutritive value of cane sugar silage.

Biofertilização na produção de alfafa e atributos

Pós-graduação em Ciência Animal - FMVA

Acúmulo de forragem verde, extração de nutrientes e valor nutricional do capim-xaraés adubado com nitrogênio

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização de fibras de milho e sua incorporação em barras de cereais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Biofertilizante na produção do capim Cynodon dactylon cv. Tierra Verde: Amanda de Castro Correia. -

Pós-graduação em Ciência Animal - FMVA

Valor nutritivo da silagem de grãos úmidos de milho na alimentação de vacas da raça holandesa

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Casca de soja em programa de restrição alimentar para suínos pesados

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Cana-de-açúcar hidrolisada com duas formas de aplicação e tamanhos de partículas

Pós-graduação em Zootecnia - FCAV

Estimativa do fluxo de nutrientes pelo trato digestivo de bovinos de corte alimentados com Brachiaria brizantha (Hochst A. Rich) Stapf. cv. Marandu em duas idades de rebrota

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Utilização da polpa cítrica ou do farelo de girassol em rações de coelhos em crescimento

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)