PDF(Pubmed)
Abstract：
Comparative efficacy of hydroxychloride (HC) and organic (OR) sources of Zn, Cu and Mn on performance of broiler breeders (BB) between 42 and 63 weeks of age (WOA) was investigated. A total of 408 ♀ Ross 708 and 48 ♂ Yield Plus cockerels were placed in pens (17 ♀ and 2 ♂) housed in 2 rooms (12 pens/room) and allocated to one of 2 diets in a completely randomized block design (n=12). The diets had similar nutrient specifications but differed in Zn, Cu, and Mn sources: 1) HO, a blend of 80% HC and 20% OR sources, and 2) OR, 100% OR sources. Birds were fed and managed according to breeder guidelines. The egg count was recorded daily and categorized as normal or abnormal. Egg yolk color, albumen height, Haugh unit, eggshell thickness, and eggshell breaking strength were assessed every 4 wk. Individual hen body weight (BW) was recorded at 5-wk intervals to determine BW uniformity. At 52 and 63 WOA, the eggs and excreta samples were collected. At the end of the trial, 4 hens per pen were bled for plasma concentration of trace minerals and organs (liver, gizzard, spleen, kidney, and thymus) weight. There were no interactions between source and age on any parameters (P > 0.05). There were no main effects of source on egg production, eggshell quality, BW, and organs weight (P > 0.05). Hens fed HO diets had darker yolk compared to those fed OR diets (P = 0.014). The concentration of Zn in the eggs of OR BB was higher (P = 0.022) than for HO birds. However, there were no dietary effects on the concentration of trace minerals in the egg, plasma, and excreta (P > 0.05). The results indicated that a mixture of HC and O as sources for Zn, Cu, and Mn was as effective as OR sources in supporting egg production, egg quality, and trace mineral utilization in broiler breeders.
摘要：
羟基氯化物（HC）和有机（OR）锌源的比较功效，研究了Cu和Mn对42至63周龄（WOA）之间肉鸡育种者（BB）性能的影响。共有408‰Ross708和48‰YieldPlus公鸡被放置在2个房间（12个围栏/房间）的围栏（17‰和2‰）中，并以完全随机的区组设计（n=12）分配给2种饮食之一。这些饮食的营养规格相似，但锌不同，Cu,和锰来源：1）HO，80%HC和20%OR源的混合物，and2)OR,100%或来源。根据饲养员指南喂养和管理鸟类。每天记录卵计数并分类为正常或异常。蛋黄颜色,蛋白高度,Haugh单位,蛋壳厚度,每4周评估一次蛋壳断裂强度。以5周的间隔记录个体母鸡体重(BW)以确定BW均匀性。在52和63WOA，收集了鸡蛋和排泄物样本。审判结束时,每笔4只母鸡放血，检测血浆中微量矿物质和器官的浓度(肝脏，Gizzard,脾,脾肾,和胸腺）重量。来源与年龄在任何参数上均无交互作用(P>0.05)。来源对鸡蛋生产没有主要影响，蛋壳质量,BW,和器官重量(P>0.05)。与饲喂或饮食的母鸡相比，饲喂HO饮食的蛋黄较深（P=0.014）。ORBB卵中的Zn浓度高于HO鸟（P=0.022）。然而,饮食对鸡蛋中微量矿物质的浓度没有影响，等离子体,排泄物(P>0.05)。结果表明，HC和O的混合物作为Zn的来源，Cu,锰在支持鸡蛋生产方面与OR来源一样有效，鸡蛋质量,以及肉鸡育种者的微量矿物质利用。
