Liliane Maria Piano Gonçalves

Glicerinas semipurificadas na alimentação de suínos nas fases de crescimento e terminação (30-90 kg)

Dois experimentos foram conduzidos com o objetivo de determinar o valor nutricional e avaliar o desempenho e caracteristicas de carcaca de suinos na fase de crescimento-terminacao, alimentados com racoes contendo dois tipos de glicerinas semipurificadas, uma de oleo vegetal (GSPV) e uma mista de oleo de soja + gordura animal (GSPM). No ensaio de digestibilidade (experimento I) foram utilizados 32 suinos mesticos, machos castrados, com 45,08 ± 4,11kg. Foram utilizados tres niveis de inclusao (6; 12 e 18%) de glicerina semipurificada (GSPV e GSPM) na dieta referencia. A energia metabolizavel (EM) das glicerinas foi estimada pela analise de regressao do consumo de EM (Kcal/kg) associada a glicerina vs. o consumo de glicerina (kg). Os valores de EM (Kcal/kg) obtidos foram: 2.731 para GSPV e 2.210 para GSPM. No Experimento II, 72 suinos (30,08 ± 1,65kg a 60,58 ± 3,57kg) na fase de crescimento e (60,83 ± 2,63kg a 93,79 ± 5,72kg) na fase de terminacao, foram distribuidos em delineamento inteiramente ao acaso, em esquema fatorial 2 x 4 + 1, sendo dois tipos de glicerina semipurificada (GSPV e GSPM), quatro niveis de inclusao (4; 8; 12 e 16%), oito unidades experimentais e uma racao testemunha, nao contendo glicerina (0%). Todos os suinos foram abatidos para determinacao das caracteristicas da carcaca. Os resultados de desempenho sugerem que e viavel a utilizacao em ate 16% de ambas as glicerinas na alimentacao de suinos em crescimento e terminacao, sem prejuizos no desempenho e caracteristicas de carcaca.

Planos nutricionais de lisina para suínos da fase inicial a terminação

This study was conducted to evaluate the lysine nutritional plans for pigs reared in mixed batches, 63 to 164 days of age. Two hundred and forty animals, with initial body weight of 24.6±1.5 kg, were distributed in a randomized block design with four nutritional plans (A: 1.05-0.88-0.82-0.78-0.78; B: 1.05-0.87-0.80-0.76-0.76; C: 1.05-0.85-0.77-0.71-0.71 and D: 1.05-0.82-0.75-0.70-0.69 % of digestible lysine, respectively from 63 to 74 days, 75 to 89 days, 90 to 111 days, 112 to 135 days and 136 to 164 days) with six replicates of ten animals each. The nutritional plans with the sequences A and B improved feed conversion of pigs when compared to other nutritional plans. Pigs fed on the nutritional plan D had lower hot carcass weight. The nutritional plan corresponding to sequence C, respectively, for pigs from 63 to 74 days, 63 to 89 days, 63 to 111 days, 63 to 135 days and 63 to 164 days meet the nutritional needs and maximizes the performance and carcass traits of the initial at finishing phase.

Neutral semi-purified glycerin in growing and finishing pigs feeding

Abstract The experiment was carried out to evaluate performance, plasma variables, carcass traits and meat quality of growing-finishing pigs fed on diets with increasing levels of neutralized semi-purified glycerin (NSPG). Eighty growing pig (30.31 ± 0.47 to 60.41 ± 0.87 kg) and 80 finishing pigs (60.45 ± 0.46 to 90.99 ± 0.83 kg) were enrolled. Pigs were allotted in a randomized block design with four inclusion levels of NSPG (3.5, 7.0, 10.5 and 14%), mainly substituted the corn in diets. The experiment included 16 replicates and one pig per pen. Additionally, there was a control diet (0% NSPG). At the end of the finishing phase, all pigs were slaughtered to evaluate quantitative carcass traits and meat quality. The regression analysis showed no effect (p > 0.05) of NSPG on growth performance, backfat thickness and loin depth in the growing and finishing phases. As to plasma variables, cholesterol and triglycerides increased linearly only in the finishing phase. A linear increase was obtained in quantitative carcass traits (p < 0.05), such as hot carcass weight, hot carcass yield, cold carcass weight and cold carcass yield. As to meat quality traits, there was a quadratic effect for water drip loss and total lipids with inclusion levels of NSPG. As a whole, NSPG can be used up to 14% in the feed of growing and finishing pigs (30–90 kg) without impairing performance, plasma variables and quantitative carcass traits and meat quality. However, its use may increase the cost of the diet depending on the feedstuffs prices.

Níveis de energia líquida e ractopamina na qualidade da carne suína

The greater efficiency of ractopamine is associated with nutritional diet adjustments due to the gradual increased need for nutrients to support the increased deposition of muscle protein. Some research shows that fats improve the use of energy and digestibility of other components of the diet for as yet unknown interactions. The survey was conducted by verifying the qualitative assessment of the flesh of pigs fed diets containing different levels of net energy and supplemented with ractopamine (10ppm). A total of 100 pigs, high genetic potential, with average initial weight of 70kg and average final weight of 100kg were used in the study. The experimental design is a randomized block with a 5x2 (factorial arrangement with five levels of net energy: 2.300; 2.425; 2.550; 2.675; 2.800kcal/kg diet and two levels of dietary ractopamine: 0 e 10 ppm). Samples were taken up to the 12th rib, being subjected to slow freezing and subsequent cooling. Thawing was performed at refrigerator temperature. Not observed interaction between the net energy levels of ractopamine supplementation and dietary variables for shear force, water holding capacity, oxidation, pH and colour. Net energy and levels of ractopamine not change the shear force, holding capacity of water, oxidation, staining and pH of pig meat.

Digestible phosphorus levels for barrows from 50 to 80 kg

This study was carried out to evaluate the levels of digestible phosphorus in diets for barrows with a high potential for lean meat deposition from 50 to 80 kg. Eighty barrows, with an initial weight of 47.93±3.43 kg, were distributed in completely randomized blocks, with each group given five levels of digestible phosphorus (1.86, 2.23, 2.61, 2.99, and 3.36 g kg−1). There were eight replicates, and two animals per experimental unit. Phosphorus levels did not significantly influence feed intake, weight gain, or feed conversion ratio. Daily digestible phosphorus intake increased linearly as levels of phosphorus in the diet were increased. Phosphorus levels did not significantly influence muscle depth, loin eye area, backfat thickness, or the percentage and quantity of lean meat in the carcass. A linear increase was observed for feeding cost as the levels of digestible phosphorus in the diet were increased, and the level of 1.86 g kg−1 cost 29.4% less when compared with the level of 2.61 g kg−1. The dry matter, natural matter, the coefficient of the residue, and volatile solids of the waste were not significantly influenced by phosphorus levels. Conversely, it was possible to observe an increasing linear effect for total solids, total phosphorus, and total nitrogen in the waste of animals receiving diets with increased levels of digestible phosphorus. The level of 1.86 g kg−1, which corresponded to a daily intake of 4.77 g−1 of digestible phosphorus, meets the requirements of barrows weighing 50 to 80 kg.