仔猪铁缺乏和贫血及断奶时铁营养状况对断奶后性能的影响
Perri AM, Friendship RM, Harding JSC, et al. Aninvestigation of iron deficiency and anemia in piglets and the effect of ironstatus at weaning on post-weaning performance.J Swine Health Prod.2015;24(1):10–20.
为了确定仔猪断奶时铁营养状况对断奶后性能的影响,并确定饲料中高含量的氧化锌是否与断奶后贫血有关,从20个安大略湖畔猪场(加拿大),每窝选取断奶前1-2天的小,中,大仔猪(1095头)。采集血清和全血样本,并测量体重。3周后,从相同猪采集血液样本并称量体重。分析血红蛋白(Hb)和其他血液参数以评估铁水平和与断奶后性能的关系。收集保育料铁和氧化锌含量。
大多参与实验的猪场在断奶时存在贫血和铁缺乏状况。与断奶时血红蛋白值正常的仔猪相比,断奶时贫血的仔猪3周后的体重轻0.82公斤(P < .05)。与断奶时较小的仔猪相比,较大仔猪的血细胞参数和血清铁含量较低,但总的铁结合能力较高(均 P < .05)。断奶后3周贫血猪比断奶时多(P< .05),且贫血流行性与氧化锌高含量有关(P < .05)。
实验所用的铁补充措施不足以预防铁缺乏,特别是对最大的仔猪尤为如此。断奶时贫血的仔猪在保育期生长较慢。教槽料中含有高含量的氧化锌与断奶后贫血有关。
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