Thalles Ribeiro Gomes

Efeito da inclusão de farelo de arroz integral em rações para leitões de 21 a 42 dias de idade

Sixty castrated male and female piglets (commercial lineage), weaned at 21 days of age and average live weight of 5.4 ± 1.44 kg, were used aiming to evaluate the effect on productive performance, diarrhea, and economic viability of adding different levels of rice bran (RB) in rations for pigs. The experimental design was completely randomized with five treatments (0.0, 5.0, 10.0, 15,0 and 20.0% of RB) and 6 replicates per treatment, where the experimental unit (plot) consisted of two animals. Results showed that daily mean feed intake (DMFI), daily mean weight gain (DMWG) and feed conversion (FC), as well as the occurrence of diarrhea, did not differ significantly (p>0.05) for the different levels of RB inclusion in the ration. The economic analysis showed no significant difference among treatments. It is concluded that adding rice bran up to 20% in pig ratios for the period from 21 to 42 days of age is technically viable.

Neutral detergent fibre in piglet diets: digestibility, performance, and deposition of body nutrients

A total 120 piglets with an average live weight of 7.00 kg, weaned at 21 days, were used to evaluate the effect of neutral detergent fibre levels on the digestibility of nutrients and energy from the diets, productive performance, and the composition and rate of deposition of nutrients and energy in the bodies of piglets in the nursery phase. The animals were distributed according to a randomized-block design into five treatments, which consisted of neutral detergent fibre levels, with six replicates and four animals per plot. A quadratic effect was detected for the digestibility coefficients of nutrients and energy, feed intake and weight gain. The increase in fibre level promoted a linear increase in fat content in the carcass, blood, and body, whereas the energy in the carcass, organs, and body showed an inverse response. The results showed a quadratic effect on the nutrient deposition rate in the carcass, organs and body. In conclusion, the best digestibility of nutrients and energy from the diet is obtained with 10-11.5% neutral detergent fibre, as higher weight gain and greater protein deposition in the body are achieved at neutral detergent fibre levels of 10.6% and 10.3%, respectively.

Níveis de farelo de coco em rações para leitões na fase de creche

A total of 32 male castrated boars and gilts of a commercial pig line aged 21 days and 6.20±0.92 kg of live weight were used to evaluate the performance and economical evaluation of copra meal inclusion in diets for piglets at nursery. Animals were allotted in a completely randomized block design with four treatments (0, 7, 14 and 21 % of copra meal), eight replicates per treatment and one animal as experimental unit. From 21 to 42 days of age, levels up to 7 % reduced daily weight gain of piglets (p<0.05). A quadratic trend on feed:gain ratio was observed from 42 to 63 days and total period (p<0.05), with better results at estimated level of 14.33 and 13.99 %, respectively. No effect of copra meal inclusion on economical variables was observed from 21 to 42 days of age. From 43 to 63 days and total period (21 to 63 days) a quadratic effect on economical indexes was observed with the inclusion of different levels of copra meal, with better results around 15 %. The inclusion of copra meal until the level of 7 % is recommended in piglet diets from 21 to 42 days of age. From 43 to 63 days, the estimated level of 15 % results in better performance and economical indexes. It is recommended to include up to 7 % of coconut meal in diets for pigs from 21 to 42 days old. From 43 to 63 days of age, the estimated level of 15 % resulted in better performance.

Viabilidade Econômica do Uso de Farelo de Arroz Integral em Rações para Leitões de 21 a 42 Dias de Idade

Foram utilizados 60 leitoes, femeas e machos castrados, de linhagem comercial, com media de 21 dias de idade e com peso inicial medio de 5,4 ± 1,44 kg, com o objetivo de se avaliar os efeitos da inclusao de farelo de arroz integral (FAI) nas racoes ate 42 dias de idade sobre a viabilidade economica. O delineamento experimental utilizado foi inteiramente casualizado, com cinco niveis de inclusao de farelo de arroz integral: 0, 5, 10, 15 e 20%; e seis repeticoes por tratamento. A unidade experimental foi constituida por dois animais (um macho castrado e uma femea). A analise economica mostrou que nao houve diferenca significativa entre os tratamentos. Concluiu-se que o fornecimento de farelo de arroz integral foi viavel ate o nivel de 20% de inclusao nas dietas de leitoes no periodo de 21 a 42 dias de idade. DOI: 10.15528/2176-4158/rcpa.v14n1p50-53