Development of organs and fat deposition in indigenous goat kids under feed restriction

SUMMARY The study aimed to evaluate the effect of feed restriction on the development of organs and fat deposition in castrated Caninde goats. Twenty one goats were distributed in a completely randomized design, with initial body weight of 15.9 ± 1.03kg. The goats were allocated into three levels of feed restriction (seven animals per level): ad libitum; moderate restriction (restriction of 20% on the amount of feed consumed by the animals fed ad libitum) and severe restriction (40% restriction on the amount of feed consumed by the animals fed ad libitum). The diet consisted of 55% forage (Tifton) and 45% concentrate. At 110 days of experiment, the goats were slaughtered with abody weight of 23.5kg ± 2.5kg. The components included the internal organs (spleen, heart, liver, pancreas, lungs, kidneys, blood) the emptied and cleaned digestive tract and fat deposits (in heart, mesenteric, omental and pelvic-renal) were weighed. Feed restriction in Canindé goats affected the weight of organs and fat deposition in regions more involved with the energy storage function (mesenteric, omental and pelvic-renal) (P 0.05), indicating that even under feed restriction organ development is proportional to the development of the body.摘要：本研究旨在评估限饲对阉割卡尼德山羊（Caninde goats）的器官发育与脂肪沉积的影响。试验共选用21只山羊，采用完全随机试验设计，初始体重为15.9±1.03kg。将山羊随机分为3个限饲水平组（每组7只）：自由采食组、中度限饲组（对自由采食组动物的采食量限制20%）以及重度限饲组（对自由采食组动物的采食量限制40%）。饲粮由55%的提夫顿牧草（Tifton）与45%的精补料组成。试验进行至110天时，对山羊进行屠宰，屠宰时平均体重为23.5±2.5kg。测定指标包括内脏器官（脾脏、心脏、肝脏、胰腺、肺脏、肾脏、血液）、经排空清洗后的消化道，以及各部位脂肪沉积（心脏周、肠系膜、网膜及盆腔肾周脂肪）的重量。限饲对卡尼德山羊的器官重量及能量储存功能相关部位的脂肪沉积具有显著影响（P 0.05），结果表明，即便处于限饲条件下，山羊的器官发育仍与机体发育呈正相关。