文献类型： 外文期刊

作者： Sharma, Nishchal K. ¹ ; Ban, Zhibin ¹ ; Classen, Hank L. ³ ; Yang, Huaming ² ; Yan, Xiaogang ² ; Choct, Mingan ⁴ ; Wu, Shu-Biao ¹ ;

作者机构： 1.Univ New England, Sch Environm & Rural Sci, Armidale, NSW 2351, Australia

2.Jilin Acad Agr Sci, Lab Anim Nutr Metab, Gongzhuling 136100, Jilin, Peoples R China

3.Univ Saskatchewan, Dept Anim & Poultry Sci, 51 Campus Dr, Saskatoon, SK S7N 5A8, Canada

4.Univ New England, Off Pro Vice Chancellor External Relat, Armidale, NSW 2351, Australia

关键词： Slowly digested starch; Pea; Heat increment; Net energy; Broiler

期刊名称：ANIMAL NUTRITION （ 影响因子：6.383； 五年影响因子：5.497 ）

ISSN： 2405-6383

年卷期： 2021 年 7 卷 2 期

页码：

收录情况： SCI

摘要： Pea starch consists predominantly of C-type of amylopectin chain which is more resistant to digestive enzymes than A-type of starch thus slowly digested in poultry. It was hypothesized that the presence of slowly digested pea starch in broiler diets will increase net energy and the efficiency of energy utilization in broilers. Two experiments were performed to investigate starch digestibility of pea at different incubation times (in vitro study) and the effect of dietary pea on heat increment and net energy in broilers using an open-circuit respiratory calorimetry system (in vivo study). One-day-old Ross 308 male broilers were fed a common starter crumble from d 1 to 10 and standard grower diets thereafter. At d 21, birds were transferred to the chambers each housing 2 birds. Each treatment was replicated 6 times with 2 identical runs of 3 replicates per treatment. A wheat-soybean meal-based diet was used as a control and the treatment diet contained 500 g of pea/kg pea. In vitro study showed that pellet processing increased (P < 0.001) starch digestibility, particularly at shorter times for wheat and a much larger response for pea. Birds offered the pea-based diet had lower (P = 0.002) feed intake, lower (P = 0.020) body weight gain, but a similar (P > 0.05) FCR compared to those offered the wheat-based diet. Net energy (NE) and apparent metabolizable energy (AME) values were higher in the pea-based diet than in the wheat-based diet (P = 0.037 for NE and P = 0.018 for AME). Heat production, respiratory quotient, heat increment of feed, efficiency of utilization of gross energy for AME, and efficiency of utilization of AME for NE did not differ (P > 0.05) between the 2 treatments. There was no effect (P > 0.05) of pea on the total tract digestibilities of dry matter, crude protein and ash, but the total tract digestibility of starch was higher (P = 0.022) in the pea-based diet compared to the wheat-based diet. This study provides insight into the energy metabolism of broilers offered a pea-based diet and indicates that dietary pea supplementation increases dietary AME and NE but has no effect on heat increment of feed and the efficiency of energy utilization in broilers. (C) 2021 Chinese Association of Animal Science and Veterinary Medicine. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.