Effects of dietary mineral bioplex in pregnant and lactating sow diets on piglet performance and physiological characteristics

A total of thirty-six Landrace × Large White sows were inseminated with semen of Large White boars and studied in late pregnancy (30 days pre-partum) and lactation phases to determine the effects of trace mineral supplementation in organic (bioplex) and inorganic forms at two levels of supplementation (1 and 2 kg/t) on the reproductive performance of the females and on piglet performance and physiologic characteristics until weaning at 21 days of age. The trace mineral supplements contained 0.0075% selenium, 2.50% zinc, 1.00% manganese, 4.00% iron, 0.25% copper and 0.01% chromium. The experimental design was completely randomized in a 2 × 2 factorial scheme with nine replicates each. The piglets were weighed at birth and at weaning (21 days) and were given a dose of 100 mg of dextran iron on the third day of life. For performance, the mean measure of the litter, including both males and females, was considered. Blood and liver were collected from the piglets at birth (two per farrowing, one male and one female), and milk was collected 10 days thereafter. Increased weight at birth and at 21 days and increased iron content in the blood and liver were found for piglets when the sows were given the organic form of trace minerals. Increased iron content in the milk was observed for higher supplementation with organic minerals only. The blood iron levels indicated a significant increase in levels with the use of the organic minerals. These results indicate important benefits in using trace minerals in organic forms for the performance of both sows and piglets

<b>Associação de carboidrase e fitase em dietas valorizadas para poedeiras semipesadas</b> - doi: 10.4025/actascianimsci.v34i3.12735 <b>Association of carbohydrases and phytase in enriched diets for semi heavy layers</b> - doi: 10.4025/actascianimsci.v34i3.12735

<p class="aresumo">O objetivo do estudo foi avaliar o efeito da associação de carboidrases e fitase em dietas de poedeiras. Foram utilizadas 300 poedeiras Isa Brown com 26 semanas, submetidas aos tratamentos: Controle Positivo: sem enzimas e valorização dos nutrientes; T2: valorização em 1,5 e 6% a EMA (kcal kg^-1), do milho e o farelo de soja, respectivamente, e redução nos níveis nutricionais conforme a matriz nutricional para a fitase; T3: valorização da EMA do milho e o farelo de soja (idem T2) e redução nos níveis de cálcio e fósforo conforme matriz nutricional da fitase; T4: T2 suplementado com 100 g t^-1 de carboidrases e 30 g t^-1 de fitase; T5: T3 suplementado com 100 g t^-1 de carboidrases e 30 g t^-1 de fitase. Foi utilizado delineamento inteiramente casualizado, seis repetições e parcela subdividida no tempo (6 períodos de 21 dias). Não houve efeito significativo dos tratamentos sobre a produção, consumo, peso dos ovos e qualidade dos ovos. A valorização dos nutrientes preconizada com a utilização das enzimas foi eficiente tecnicamente para manutenção do desempenho e qualidade dos ovos de poedeiras semipesadas nas condições avaliadas, necessitando de outras pesquisas com maior redução nos níveis energéticos para avaliação do efeito das enzimas sobre a disponibilidade de energia.</p><br><div class="Section1"><p class="aresumo">The aim of this study was to evaluate the effect of the combination of carbohydrases and phytase in diets of laying hens. A total of 300 Isa Brown hens at 26 weeks were submitted to the following treatments: Positive Control: without enzyme and nutrient recovery, T2: enrichment by 1.5 and 6% AME (kcal kg^-1) of corn and soybean meal, respectively, and reduction in nutrient levels as the nutrient matrix for the phytase; T3: EMA enrichment of corn and soybean meal (T2 identification) and reduced levels of calcium and phosphorus as the phytase nutrient matrix; T4: T2 supplemented with 100 g ton.^-1 of carbohydrases and 30 g ton.^-1 of phytase; T5: T3 supplemented with 100 g ton.^-1 of carbohydrases and 30 g ton.^-1 of phytase. We used a randomized design, six replications and split plot in time (6 periods of 21 days each). No significant effects of treatments were observed on production, consumption, egg weight and egg quality. The enrichment of nutrients preconized by the use of enzymes were technically efficient to maintain the performance and egg quality of laying hens in the evaluated conditions, requiring further research with greater reduction in energy levels to evaluate the effect of enzymes on the availability of energy.</p></div

Evaluation of the use of probiotic (Bacillus subtilis C-3102) as additive to improve performance in broiler chicken diets

The objective of this experiment was to evaluate the use of probiotic based upon Bacillus subtilis C-3102 (BS) in broiler diets containing or not conventional additive growth-promoter (AGP). A total of 1,824 one-day-old chicks of the Cobb-500 strain were used and distributed into 48 plots (1.50 × 2.00 m). A completely randomized design with four treatments and 12 repetitions was adopted. The treatments evaluated were: 1- Negative Control - AGP-free diet (NC); 2 - Positive Control, with AGP halquinol 30 mg/kg diet (PC); 3 - NC + BS (3x10(5) cfu/g diet); and 4 - PC + BS (3x10(5) cfu/g diet). The diets were on corn, soybean meal and meat and bone meal basis, formulated according to the nutrient allowances of the Strain Cobb Guide, following a feed program with three diets (starter, grower and finisher). At 21 and 42 days of age, feed intake, weight gain and feed conversion were evaluated, and carcass yield characteristics were determined at 42 days of age. Throughout the trial period (starter and total phases), better feed conversion was found for broilers fed diet with both additives (AGP and BS) combined. At the end of the experiment (1 to 42 days), the highest weight gain also occurred in broilers fed diets with a combination of the two additives. In present study, the use of BS or AGP alone in diets did not affect the performance of broilers. The carcass yield was not influenced by the use of the additives and beneficial effects of supplementation of BS and AGP combined in the diet on broiler performance were observed

Efeitos da suplementação enzimática e da forma física da ração sobre o desempenho e as características de carcaça de frangos de corte

Um experimento foi conduzido para avaliar o efeito da suplementação do complexo enzimático Endopower bÒ, composto de a–galactosidase, galactomanase, xilanase e b–glucanase e da forma física da ração sobre o desempenho e as características de carcaça de frangos de corte. Foram utilizados 1488 frangos de corte machos, distribuídos num delineamento inteiramente casualizado, oito tratamentos e seis repetições. Os tratamentos constituíram–se de rações à base de milho e de farelo de soja, sem adição de enzimas ou com 200 ou 400 g de enzimas por tonelada de ração e duas formas físicas (farelada e peletizada). Dois tratamentos adicionais continham dieta basal farelada com energias do milho e farelo de soja valorados em 2 e 9%, respectivamente e digestibilidade de aminoácidos valorados em 4% para ambos ingredientes, sendo um tratamento sem adição de enzimas e outro com a adição de 200 g por tonelada de ração. O desempenho foi avaliado de 1 a 21 dias e 1 a 42 dias de idade das aves. Houve efeito da suplementação enzimática no consumo de ração, nos dois períodos avaliados (P0,05) dos frangos de corte 1–21 dias de idade.A study was conducted in order to verify the effect of enzyme supplementation (Endopower bÒ, based on de a–galactosidase, galactomanase, xilanase e b–glucanase) and feeding different physical forms of diets on performance and carcass yield of broilers from 1 to 42 dais old. A total of 1488 broilers chickens, 8 treatments, 6 replicates and 31 broilers per experimental unit plot were fed with diets based on corn and soybean, with enzyme supplementation 200 or 400g for ton. and without enzymes supplementation and two physical forms (meal and pelleted ). Two additional basal diets with the energetic values of corn and soybean meal valued in 2 and 9% respectively and digestibilidade of amino acids digestibility valued in 4% by using one treatment with no enzyme supplementation and another one with enzyme supplementation of 200g/ton. Two periods 1–21 and 22–42 days old were evaluated. Reduced feed intake were observed in linear way (P0.05) on the broiler performance from 1 to 21 days old