Influência de tipos de estocagem na composição e valor nutritivo do feno de capim-de-rodes

Realizou-se, na Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, um estudo da variação do valor nutritivo do feno de capim-de-rodes (Chloris gayana Kunth), em três tipos de estocagem: em galpão, no campo com cobertura plástica, e no campo com cobertura morta, em três diferentes tempos de armazenamento (60, 120 e 180 dias), com utilização de ensaios de digestibilidade in vivo. O delineamento experimental foi em blocos casualizados, distribuídos em um fatorial 3 x 3 com três repetições. A análise de variância revelou não haver diferenças significativas para os coeficientes de digestibilidade da matéria seca, mas sim para o extrato etéreo e extrativo não nitrogenado digestível, cujas médias foram 54%, 39,86% e 59,02% aos 60, 120 e 180 dias de armazenamento, e de 51,85%, 59,10% e 58,25% para o extrativo não-nitrogenado digestível, respectivamente. Em relação aos tipos de estocagem, os coeficientes de digestibilidade foram: 52,10%, 51,87% e 54,94% para o extrato etéreo, e 58,18% 57,16% e 53,88% para o extrativo não-nitrogenado. A ingestão média de matéria seca pelos animais foi de 72 g/kg P.V.0,75.

Valor nutritivo de rações contendo cana-de-açúcar, cama-de-frango e milho

Realizou-se, no campus da Faculdade de Ciências Agrárias e Veterinárias da UNESP, em Jaboticabal, SP, um estudo com o objetivo de determinar a ingestão voluntária e a digestibilidade aparente de rações contendo diferentes relações de cana-de-açúcar: cama-de-frango (CC1= 65,50 : 34,50%; CC2= 58,00 : 42,00%; e CC3- 52,00 : 48,00% combinadas com três níveis de milho (M1 = 0 kg; M2 = 0,75 kg e M3 = 1,50 kg), através do delineamento em blocos casualizados em esquema fatorial 3 com três repetições. Utilizaram-se nove bezerros pesando, em média, 334 kg. Através da análise de regressão, detectou-se efeito linear positivo (P < 0,01) entre os níveis de milho e a digestibilidade aparente da matéria seca, da matéria orgânica, do extrato etéreo, do extrato não nitrogenado e dos teores de nutrientes digestíveis totais. As proporções de cana: cama-de-frango com menores quantidades de cana proporcionaram aumentos na digestibilidade da proteína e da fibra bruta (P < 0,01). Não houve interação significativa entre os níveis de milho e as proporções de cana: cama-de-frango. O valor nutritivo e a ingestão de matéria seca total foram significativamente aumentadas nas rações com os níveis crescentes de milho (P < 0,01).

Estudo do valor nutritivo do farelo de guandu [Cajanus cajan (L.) Miilps] var. fava larga na alimentação de frangos de corte. 1. Avaliação do tratamento térmico

The experiment was conducted to evaluate pigeon pea (Cajanus cajan) protein in broiler chicks (up to 28 days of age) feeding, as compared to soybean (Glycine mar) protein, In the experiment the effects of temperature and autoclaving on antinutritional factors on pigeon pea meal were studied. Temperatures of 100, 110 e 120 degrees C and times of autoclaving of 10, 20 and 30 minutes were applied using a two-way factorial design, replicated in four times. Underheating and overheating during the process of inactivation of proteases inhibiting were evaluated by ureatic activity and protein solubility analysis, after the grains were dried and ground. After 28 days, the best time of autoclaving was 20 minutes (p<,05) irrespectively of temperature, which lead to a lower feed consuption. There were no histopathological alterations in kidney, liver, pancreas, heart and intestines of the broilers.

Valor nutritivo do feno de Brachiaria decumbens Stapf cv. Basilisk submetido a tratamento com amônia anidra ou uréia

The effects of the ammoniation of Brachiaria decumbens hay was evaluated. The hay bales were distributed into a complete randomized block design, with four replications and they were submitted to the treatments: untreated or treated with anhydrous ammonia (NH3)(2,0 and 3,0% of the DM) or with urea (3,6 and 5,4% of the DM). All the hays bales remained under plastic cover for 45 days. After three days of aeration, samples were collected for the determination of the chemical composition, nitrogenous compounds fraction and the in vitro dry matter (IVDDM) and organic matter (IVDOM) digestibility. In the metabolic study, Saanen goats breed was used in a 5x5 Latin squares design, where the apparent digestibility, the voluntary intake and the nutritive value index were evaluated. The ammoniation increased the contents of the total N, N ammonia (N-NH3) and non-protein N, with high effect on the levels of 3,0% of NH3 and 5,4% of urea. There were no differences between the level of 3,0% of NH3 and 5,4% of urea for the total N, N-NH3 and NPN. However, the treatment with 3,0% of NH3 allowed a larger fixation of N in ADIN and NDIN forms. The ammoniation increased the IVDMD and IVDMO and reduced the contents of neutral detergent fiber (NDF), hemicellulose, acid detergent fiber (ADF) and lignin, but it did not alter the cellulose and gross energy contents. The ammoniation increased the DM, OM, CP, NDF, ADF, hemicellulose, cellulose and gross energy apparent digestibility and as well as the voluntary intake of DM, digestible DM, digestible OM, digestible protein, digestible energy and the nutritive value index. The ammoniation increased the hay nutritive value index, but there were no differences between the levels of NH3 and urea.

Efeitos da amonização sobre o valor nutritivo do feno de capim-braquiária

This work was conducted to determine the effects of ammoniation and supplementation on the nutritive value of signal grass (Brachiaria decumbens Stapf) hay. The hay was treated with anhydrous ammonia (3.0% DM) and introduced into the rations for sheep with 12.00% of CP, identified as T1 grass hay without NH3 + cotton seed meal; T2 = treated hay (3.0% de NH3); T3 = treated hay (3.0% de NH3) + com grain meal; T4 = hay + cotton seed meal + corn grain meal. nit: following coefficients of digestibility were determined for T1, T2, T3 e T4, respectively: DM (54.90; 55.50); 54.50; and 56.12%); NI)I: (51.36; 60.20; 55.30; and 48.35%); ADF (47.36; 58.66; 56.03; and 47.07%); hemicellulose (58.80; 63.32; 56.00; and 49.70%); cellulose (55.58; 71.80; 68.07; and 58.21%); lignin (10.10; 32.18; 31.74; and 0.72%) and protein (64.6; 59.36; 56.16; and 70. 15%). nle N balances for T1, T2, T3 and T4 were 5.69; 3.88; 3.90; and 8,82 g N/day. It was concluded that the ammoniation was equivalent to the vegetable protein supplementation in the rations. Furthermore, this treatment showed a greater potential to increase fiber digestion, particulary for ADF and cellulose.

Valor nutricional da soja integral tostada e extrusada para poedeiras comerciais

An experiment was conducted to determine the apparent nitrogen-corrected metabolizable energy (AMEn) values and the coefficients' metabolization of the: dry matter, ether extract, calcium and phosphorus availabilities of experimental layer diets containing toasted (TSB) and extruded (ESB) soybeans. The soybean meal (SBM) was substituted at 0, 50, and 100% by TSB and ESB whole soybeans. The whole soybeans utilization in layer diets did not adversely affect calcium and phosphorus availability. The SBM and ESB, in diets with crude protein at 17%, showed the best ether extract coefficients of metabolization. When TSB replaced all SBM in the diets, it was observed the worst value for AMEn.

O EEG na insuficiencia renal cronica. III. Valor prognostico

In 1983 and 1984 we performed a longitudinal 1-year follow-up study of 15 patients with chronic renal failure, 8 of whom were on hemodialysis and 7 on peritoneal dialysis. The EEG abnormalities of these patients were catalogued and filed and the patients' medical records were examined 5 years later for an analysis of their clinical evolution. Old age EEG findings were detected in young patients with chronic renal failure who died. We conclude that old age EEG findings in patients of any age with chronic renal failure represent a poor prognosis. In contrast, EEG asynchronies are associated with severe uremic encephalopathy but are reversible, since these phenomena were fully reversed together with all clinical alterations in a patient who later received a renal transplant.

Aditivos na ensilagem do capim-elefante. III. Valor nutritivo e consumo voluntário e digestibilidade aparente em ovinos

The intake, the apparent digestibility and the nutritive value of elephant grass (Pennisetum purpureum Schum.) silages prepared with the addition of 0, 8, 16 and 24% of ground ear corn with husks, wheat bran and saccharin, dry weight of additive/wet weight of green chop upon the silage were evaluated. A randomized block design with three replications, in a factorial arrangement (3 additives x 4 levels) was used. As experimental silos, 200-liter plastic vessels were used. Sheep weighing approximately 50 kg, kept in individual cages, receiving water and mineral mixture ad libitum, were used to measure the intake and apparent digestibility of silages. There was a ten-day period of adaptation to the experiment conditions. The voluntary intake of the silages was determined by the mean of the intake observed in the last three days of a ten-day period. The fecal collection period lasted for seven days. In this period the animals were fed 80% of the observed intake obtained in the previous phase. The dry matter intake increased as the levels of the additives in the silages were increased. The digestibility of the wall cell components decreased as the rates of the additives in the ensilage process increased. The silages prepared with wheat bran or ground ear corn with husks showed higher nutritive value than the ones with saccharin.

Valor nutritivo de macrófitas aquáticas flutuantes (Eichhornia crassipes, Pistia stratiotes e Salvinia molesta) utilizadas no tratamento de efluentes de aqüicultura

The aim of this study was to evaluate the nutritive value of free-floating aquatic macrophytes, Eichhornia crassipes (Mart.) Solms (Pontederiaceae), Pistia stratiotes (L.) (Araceae) and Salvinia molesta (Mitchell) (Salviniaceae) used in a Nile tilapia (Oreochromis niloticus) waste treatment, and these species biomass potential uses. The vegetal biomass samples were collected from 0.25 m 2 floating squares and divided in aerial and submerse parts, to determine the concentrations of cell wall fraction, soluble carbohydrates, polyphenols, lipids, crude protein and total phosphorus. The higher nutritive value was observed in E. crassipes and S. molesta aerial parts, and in P. stratiotes total biomass, due to their lower cell wall fraction mean rates (60.7; 64.2 and 56.9 % dry mass, respectively) and to the higher rates of: crude protein (10.1; 9.1 and 8.8 % dry mass, respectively), soluble carbohydrates (26.6; 18.7 and 12.4 mg.g -1 dry mass, respectively) and lipids (7.6; 4.5 and 4.4% dry mass, respectively). It may be concluded that P. stratiotes total biomass, and E. crassipes and S. molesta aerial biomass have nutritive values with potential use for ruminant feeding or as ration ingredients.

Panorama de la Inserción Internacional de América Latina y el Caribe 2013: lenta poscrisis, meganegociaciones comerciales y cadenas de valor: el espacio de acción regional

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Valor nutricional do farelo de algodão para alor a tilśpia do nilo (Oreochromis niloticus)

Cottonseed meals (CSM) with different protein levels (35, 39 and 40%) were evaluated to determine their chemical composition and measure apparent digestibility coefficients (ADC) of dry matter, protein, amino acids, energy, lipid and minerals for Nile tilapia. Apparent digestibility coefficients were determined using a reference purified diet containing 0.1% of chromic oxide indicator, and test diets contained 60% of reference diet and 40% of test ingredients. Results showed that apparent digestibility coefficients of cottonseed meals were different (p < 0.05). The apparent digestibility coefficients were: dry matter, 53.45-54.32%; crude protein, 71.56-74.81%; energy, 53.80-58.60%; lipid, 85.37-89.11%; phosphorus, 33.75-34.50%; calcium, 41.21-43.75%; iron, 62.02-79.85%; zinc, 0-67.41%; copper, 13.37-14.27%; essential amino acids, 71.39-79.17%; and non-essential amino acids, 77.08-82.58%. The ADC of protein did not reflect the majority of amino acids ADC showing variation in individual digestibility of amino acids and among cottonseed meals. Cottonseed meal can be used as protein succedaneum in Nile tilapia diets.

Cambios estructurales en las actividades agropecuarias: de lo primario a las cadenas globales de valor

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Comercio y pobreza en Paraguay: el caso de una cadena de valor agroindustrial

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Comercio y pobreza en Paraguay: el caso de una cadena de valor agroindustrial

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