Tiago Adriano Simioni

Mathematical models for estimating the parameters of ruminal degradation kinetics of protein concentrates

This studied aimed to evaluate the parameters of ruminal degradation kinetics of protein concentrates, soybean meal (SM) and cotton cake (CC).To estimate the in situ degradation parameters of DM and CP from coproducts were fitted 5different non-linear mathematical models: Exponencial, Van Milgen, Logistico, Gompertz and Richards. For in situ evaluation were used two cattle cannulated in the rumen. The samples were incubate dat 0, 2, 4, 6, 12, 16, 24, 36, 48 and 72 hours and in the incubation residues were determined DM and CP and their degradability. The DM degradability of SM were 86.35, 74.23, 65.50% and to CC were 53.44, 41.70 and 35.21% in passage rates of 0.02; 0.05 and 0.08.h-1, respectively. The SM and CC showed values for the CP soluble fraction of the 18.15, 34.77% and 79.76, 55.10% to insoluble potentially degradable fraction, respectively. According to the Akaike weights (Wi) the model of Richards has 95.45 and 49.64% of chance to be the most suitable model to characterize the in situ DM degradation of SM and CC. However, the Gompertz model has 63.86 and 66.49% chance to be the most suitable model to characterize the CP in situ degradation of SM and CC.

Comportamento ingestivo de ovinos em pastos de diferentes estruturas

Sheep are gregarious animals and spend time with food intake inserted with one or more periods of rumination or leisure. The peaks of grazing and ruminating usually happen in the cooler hours of the day, keeping in idle at times of higher temperatures. These animals modify one or more components of their ingestive behavior seeking to overcome limiting conditions for their consumption and get the necessary amounts of nutrients for the maintenance and production. Thus, this review has as an objective to discuss these items that affect the sheep’s intake behavior at pasture. The feeding behavior study cooperates in solving problems related to the decrease in consumption in critical times for milk or meat, through of management practices, installation design and supply diet with quantity and quality.

Glicerina bruta de biodiesel na alimentação de ruminantes

Biodiesel is considered an environmentally friendly fuel, biodegradable, nontoxic, and virtually free of sulfur and aromatics, when replacing the conventional diesel, biodiesel can reduce emissions of hydrocarbons and carbon monoxide with the search for renewable sources. For each ton of biodiesel are produced about 100 kg of glycerol, with the accumulation of this coproduct in the environment can cause contamination of soil and water, thus, research is being undertaken to find alternatives to the use of surplus glycerol. The cost of animal feed is around 70% of all production. And one of the ways to be decreasing this cost power is the use of by-products like glycerin in animal feed and also helping to preserve natural resources (no pollution).Biodiesel is considered an environmentally friendly fuel, biodegradable, nontoxic, and virtually free of sulfur and aromatics, when replacing the conventional diesel, biodiesel can reduce emissions of hydrocarbons and carbon monoxide with the search for renewable sources. For each ton of biodiesel are produced about 100 kg of glycerol, with the accumulation of this coproduct in the environment can cause contamination of soil and water, thus, research is being undertaken to find alternatives to the use of surplus glycerol. The cost of animal feed is around 70% of all production. And one of the ways to be decreasing this cost power is the use of by-products like glycerin in animal feed and also helping to preserve natural resources (no pollution).

Ingestive behavior of sheep confined silages

301 http://dx.doi.org/10.5935/1981-2965.20130026 Artigo Cientifico http://www.higieneanimal.ufc.br Zootecnia / Recursos Pesqueiros Comportamento ingestivo de ovinos confinados com silagens Ingestive behavior of sheep confined silages Claudio Jonasson Mousquer 1* , Geferson Antonio Fernandes 2 , Wanderson Jose Rodrigues de Castro 1 Alvair Hoffmann 3 , Tiago Adriano Simioni 3 , Fabiola Francisca Dias Fernandes 4