Desempenho e características de carcaça de três genótipos comerciais de frangos de corte alimentados com diferentes dietas / Performance and carcass traits of three commercial broiler genotypes fed different diets

Este estudo teve como objetivo avaliar o desempenho e as características de carcaça de frangos de corte de três genótipos comerciais do nascimento aos 35 dias de idade. Utilizou-se um total de 2.970 pintos de três genótipos de aves comerciais (Cobb 500, Hubbard Flex e Ross 308). Os programas nutricionais foram dieta basal, dieta com 10% mais e 10% menos de aminoácidos do que a dieta basal. As aves foram distribuídas em delineamento inteiramente ao acaso, em esquema fatorial 3x3x2 (genótipo x dieta x sexo), com cinco repetições e 33 aves por unidade experimental. Conversão alimentar, ganho de peso diário, ingestão da dieta e peso corporal aos 35 dias de idade foram registrados. Duas aves de cada unidade experimental foram amostradas e abatidas aos 35 dias de idade para avaliar as seguintes características de carcaça: peso corporal no momento do abate, peso da carcaça e rendimento, e peso e rendimento dos cortes (peito, pernas e asas). Houve uma interação significativa entre o genótipo e sexo para GPD e PC35. Os machos apresentaram melhores desempenhos e características de carcaças do que as fêmeas.(AU)

This study aimed to evaluate performance and carcass traits of three commercial broiler genotypes from hatch to 35 days of age. A total of 2,970 sexed one day old chicks of three commercial broiler genotypes (Cobb 500, Hubbard Flex and Ross 308) were used. The nutritional programs were basal diet, diet with 10% more and 10% less amino acids than the basal diets. Birds were distributed in a completely randomized experimental design in a 3x3x2 (genotype x diet x sex) factorial scheme, with five replicates and 33 birds per experimental unit. Feed conversion, daily weight gain, diet intake and body weight at 35 days of age were recorded. Two birds from each experimental unit were sampled and slaughtered at 35 days of age to evaluate the following carcass traits: slaughter body weight, carcass weight and yield, and main cuts (breast, legs and wings) weight and yield. There was a significant interaction between genotype and sex for ADG and BW35. Males fed basal diets presented higher performance and carcass traits in comparison to females.(AU)

Evaluation of Capsicum frutescens powder effects on the growth performances, biochemical and hematological parameters in Hubbard broiler.

Growth promoters are widely used in poultry farming. However, this practice is a potential risk of microbial resistances and eventually can have harmful effects on human health. For that, the search of alternative solutions knows an increasing interest. The spices, owing to their multiple properties, are potentials growth promoters for poultry. The present study aims to evaluate the effects of Capsicum frutescens supplementation on growth performances, hematological and biochemical parameters and on the carcass of broilers. A total of 200 (Hubbard) day old chicks with an initial average weight of 49.63±3.74 g were used in this study. They were randomly divided into 5 different groups (P0; P5; P5’; P10 and P10’) with 4 repetitions. P0 (control group which received basal diet); P5 (basal diet plus pepper at 0.5% for one month); P5' (basal diet plus pepper at 0.5% pepper for 2 months) P10 (basal diet plus pepper at 1% for one month) and P10' (basal diet plus 1% pepper for 2 months). The experiments lasted 56 days. Apparent digestibility of dry matter varied from 73.5 ± 1.28% to 74.95 ± 1.28% but not significantly different (p>0.05). Feed consumption, the final body weight average and the feed conversion ratio were similar for all groups. The blood glucose level was reduced by the pepper supplementation (p<0,001). It was higher for P0 (2.58±0.02 mmol/l). Creatinin, cholesterol level and the hematological parameters, except leucocytes number, were not modified (p>0.05). In conclusion, although the chickens did not reject food supplemented with Capsicum frutescens powder, it’s effects were not perceptible on growth performances. However, the lowering effect of this spice on blood glucose level was proved in this study.

Possible role of alternative respiration in temperature rise of water stressed plants.

Role of alternative respiration, a thermogenic pathway, was evaluated in temperature rise of water stressed plants. Transpiration rate, plant temperature and respiratory dynamics were monitored in field grown irrigated and unirrigated sorghum (Sorghum vulgare Pers.) hybrid CSH 6 and pearl millet (Pennirelum typhoider (Burm. f.) Stapt and Hubbard) var. J 104 for 22 days. Transpiration rate of irrigated plants was always higher than the unirrigated plants. But the plant temperature and the alternative respiration activity of irrigated plants was always lower than unirrigated plants. The reduction in transpiration rate of unirrigated pearl millet was more as compared to unirrigated sorghum. Nonetheless, alternative respiration activity was higher in unirrigated sorghum as compared to unirrigated pearl millet. Temperature of unirrigated sorghum plants increased by 10·4°C during 22 days and it was 8·0°C higher than irrigated sorghum at day 22. Stressed pearl millet showed an increase of 3·9°C during 22 days and it was 2·9°C higher than the irrigated pearl millet at day 22. It is suggested that the heat released because of the alternative respiration activity also contributes towards temperature rise of water stressed plants.

Effects of Cryptoporus volvatus ferment substance on airway hyperresponsiveness and inflammation in asthmatic mice with spleen-deficiency syndrome / 中草药

Objective To establish a model of asthma mice with spleen-deficiency syndrome (asthma-SDS) and to investigate the effects of Cryptoporus volvatus ferment substance (CVFS) on the airway hyperresponsiveness and inflammation in model mice. Methods An asthma-SDS model of mice was established by ovalbumin (OVA)-sensitized plus over-eating and over-exerting. The changes of lung resistance (R_L), inflammatory cells in bronchoalveolar lavage fluid (BALF), lung tissue pathology, and spleen index were observed. Results Compared with the simple asthma model of mice, the airway hyperresponsiveness, eosinophils number in the BALF, lung tissue pathology, and spleen index in the asthma-SDS model of mice showed a significant difference (P