短期欠饲对母羊内脏器官重量的影响

P. Nozière, M. Doreau
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引用次数: 2

摘要

我们通过因子实验设计评估了短期欠饲对成年母羊内脏组织体重和蛋白质质量的影响。在实验前期,18只母羊被分成2组,每组9只,在4周内以112或38%的能量维持需求饲喂第二批天然草地干草。4周内,每组3只母羊分别饲喂低采食量(L组)、中采食量(M组)和高采食量(H组),分别相当于其能量维持需氧量的38%、75%和112%,然后屠宰。测定各脏器的鲜重和蛋白质质量。没有观察到实验前摄入水平对任何内脏器官的体重和蛋白质质量的携带效应。内脏组织对M组和L组活重下降的贡献率分别为10.7%和8.6%。内脏组织重量的减少(- 15%)主要归因于网状胃(- 23%)、肝脏(- 21%)和较小程度的小肠(- 11%)。瘤胃壁背囊和腹囊粘膜和肌肉浆膜的质量比没有大的变化。这些结果与之前发表的关于长期缺食母羊的研究结果进行了讨论,表明缺食引起的全羊能量消耗的减少主要与内脏重量的短期减少有关,而在内脏重量稳定的情况下,其他组织的减少主要与缺食引起的全羊内脏重量的减少有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of short‐term underfeeding on weight of splanchnic organs in ewes
We assessed the effect of short‐term underfeeding on weight and protein mass of splanchnic tissues in adult ewes submitted to a factorial experimental design. In a pre‐experimental period, 18 ewes divided into 2 groups of 9 were fed a second cut of natural grassland hay during 4 weeks at 112 or 38% of their energy maintenance requirements. Three ewes of each group were then fed the same hay during 4 weeks at either low (group L), moderate (group M) or high intake (group H), corresponding to 38, 75 or 112% of their energy maintenance requirements, respectively, then slaughtered. Fresh weight and protein mass of splanchnic organs were measured. No carry‐over effect of the pre‐experimental level of intake on weight and protein mass was observed for any splanchnic organs. Splanchnic tissues contributed at 10.7 and 8.6% to the decrease in live weight for groups M and L, respectively. The decrease in weight of splanchnic tissues (‐15%) was mainly attributed to reticulorumen (‐23%), liver (‐21%), and at a lesser extent small intestine (‐11%). No large change in the mass ratio between mucosa and muscular‐sercsa in both dorsal and ventral sacs occurred in the rumen wall. These results are discussed together with previous published results on long‐term underfed ewes, and suggest that the decrease in energy expenditure in whole animal induced by underfeeding is mainly related to the decrease in splanchnic weight at short‐term, and to the decrease in other tissues at long‐term, splanchnic weight being stabilized.
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