Maximiliane Alavarse Zambom

Silagem de resíduo da extração de amido da mandioca em substituição ao milho moído da ração para ovinos

Com objetivo de avaliar o efeito da substituicao do milho grao moido pela silagem de residuo da extracao de amido da mandioca, em dietas para ovinos em confinamento, foi mensurado o consumo, a digestibilidade da materia seca (MS) e dos nutrientes, e o pH ruminal. Foram utilizados cinco ovinos, canulados, distribuidos em delineamento de quadrado latino (5x5), composto de cinco animais, cinco dietas e cinco periodos experimentais de 21 dias cada, em um total de 105 dias de experimento. Os tratamentos foram diferentes niveis de substituicao (0, 25, 50, 75 e 100%) do milho pela silagem de residuo da extracao de amido da mandioca. Os niveis de substituicao interferiram de forma significativa, obtendo variacao cubica para a ingestao de MS, proteina bruta (PB), materia orgânica (MO), extrato etereo (EE) e carboidratos totais (CT), e efeito quadratico para a ingestao de fibra em detergente neutro (FDN) e fibra em detergente acido (FDA). Porem nao houve diferencas significativas na digestibilidadede nutrientes conforme a substituicao do milho pela silagem de residuo da extracao de amido da mandioca, assim como nao interferiram nos valores de pH ruminal. Recomenda-se a substituicao de 75% do milho pela silagem de residuo da extracao de amido da mandioca.

Use of dried waste of cassava starch extraction for feeding lactating cows

The aim of this study was to determine the best level of utilization of dried waste of cassava starch extraction (WCSEd) as a substitute for corn for lactating cows. Four lactating cows were fed diets with increasing levels (0%, 33%, 66% and 100%) of WCSEd as a substitute for corn. The intake and digestibility of dry matter and nutrients, milk production and composition, blood parameters of glucose and urea and microbial synthesis of the diets were evaluated. There was a reduction in dry matter intake, organic matter, ether extract and total carbohydrate, and increased intake of acid detergent fiber. Nutrient digestibility was not affected while the synthesis of microbial protein increased. These changes resulted in reduced milk production, without altering the efficiency of production or the constituents of milk, with a decreasing effect on daily production of lactose, solids and minerals. Metabolic parameters, glucose and urea nitrogen in plasma, remained within appropriate levels. The dried residue from the extraction of cassava starch can be used as feed for dairy cows to replace up to 100% of the corn ration. However, its use promotes a reduction in intake of dry matter and nutrients as well as a reduction in the production of milk, with impacts on the profitability of the product.

Effect of whole oilseeds feeding on performance and nutritive values of diets of young growing saanen goats

Twenty-eight Saanen goat kids (16 non-castrated males and 12 females; 14.38±1.60 kg) were used to evaluate the performance and nutritional value of diets. Animals were randomly allotted into a 4x2 (diets x gender) factorial arrangement. Treatments consisted of four different total mixed diets composed of oat hay, soybean meal, mineral supplement, and/or oilseeds replacing ground corn (on dry matter basis), as follows: 1) control (without oilseeds), 2) diet containing 7.9% flaxseed, 3) diet with 7.3% sunflower, and 4) diet containing 8.0% canola. Dry matter intake was higher for animals receiving control diet. Gender did not influence dry matter and nutrient intake. Oilseeds did not affect the average daily gain (ADG) and feed conversion (FC). Flaxseed diet showed more days in feedlot. Males showed better means of ADG, FC and days in feedlot. Diets containing oilseeds had higher values for ether extract digestibility and lower total carbohydrates than the control diet. The energetic value of diets did not alter. The inclusion of flaxseed, sunflower or canola in diets of Saanen goat kids in place (8% on a DM basis) corn, does not improve the performance, however these oilseeds may be used without changing the nutritional value of diets.

Características da silagem de resíduo úmido de fécula de mandioca adicionada de níveis de ureia

This study aimed to evaluate the nutritive and microbiological composition and fermentation changes in the residue of wet cassava starch (RWCS) ensiled with different levels of urea. The experimental design was a randomized split plot 4x2, with four levels of urea added in the residue of wet cassava starch (0, 5, 10, 15 and 20 g/kg as fed) allocated to plots, and the sampling positions in the silo (superficial and intermediate) allocated to the subplots. The RWCS was ensiled in air circular concrete silos with approximately 1000 kg of capacity. Urea was added to RWCS between layers at the time of ensiling and the material was kept ensiled for a period of 45 days. After the fermentation period, the silos were opened and samples were collected for the determination of temperature, pH, total nitrogen, ammonia, dry matter, mineral matter, organic matter, crude protein, neutral detergent fiber (NDF), acid detergent fiber (ADF), cellulose, hemicellulose and lignin, and the population of fungi and yeasts, lactic acid bacteria and Clostridium. The urea addition to the level of 20 g/kg as fed silage for the residue of wet cassava starch with approximately 18 % of DM increases the pH, total N, NH3-N, crude protein, NDF and ADF of silage. However, this addition reduce the populations of lactic acid bacteria, fungi, yeasts and the total population of microorganisms without altering the content of dry matter, hemicellulose, cellulose and lignin.