Škrlep Martin, Poklukar Klavdija, Millet Sam, Čandek-Potokar Marjeta
Agricultural Institute of Slovenia, Ljubljana, Slovenia.
Animal Science Unit, Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Melle, Belgium.
Anim Sci J. 2025 Jan-Dec;96(1):e70077. doi: 10.1111/asj.70077.
This study investigated the effects of reduced dietary protein levels in fat-type local breed Krškopolje pig in conventional indoor and organic outdoor systems. Two tests were conducted: one in conventional system (n = 28 pigs) and one in organic outdoor system (n = 24 pigs). Two dietary strategies varying in crude protein (CP) level were tested: control, high protein (HP) with phases of 15%, 12.5%, and 10% CP content and low protein (LP) with phases of 15% and 10% CP content. The ingredients used were identical, but in the organic diet, they came from organic agriculture. The feed was offered ad libitum. Feed distribution was recorded, pigs were weighed, and the thickness of the backfat and longissimus lumborum muscle was measured with ultrasound. After 228 days, pigs were slaughtered, and carcass and meat quality were assessed. Modeling growth data with InraPorc indicated that protein and essential amino acid requirements were generally met, except for lysine in the LP diets, which appeared with the transition to a 10% protein diet. Lysine deficiency was more pronounced in the organic than in conventional system. Overall growth rate was similar in LP and HP groups. There were no pertinent differences in carcass or meat quality.
本研究调查了在传统室内和有机室外养殖系统中，降低脂肪型本地品种克尔什科波尔耶猪的日粮蛋白质水平所产生的影响。进行了两项试验：一项在传统系统中进行（n = 28头猪），另一项在有机室外系统中进行（n = 24头猪）。测试了两种粗蛋白（CP）水平不同的日粮策略：对照、高蛋白（HP），其CP含量阶段为15%、12.5%和10%，以及低蛋白（LP），其CP含量阶段为15%和10%。所使用的原料相同，但有机日粮中的原料来自有机农业。饲料自由采食。记录饲料分配情况，对猪进行称重，并用超声波测量背膘厚度和腰大肌厚度。228天后，屠宰猪并评估胴体和肉质。用InraPorc对生长数据进行建模表明，除了LP日粮中的赖氨酸外，蛋白质和必需氨基酸需求总体上得到满足，随着向10%蛋白质日粮的过渡，赖氨酸缺乏问题出现。有机系统中的赖氨酸缺乏比传统系统中更明显。LP组和HP组的总体生长速度相似。胴体或肉质方面没有显著差异。
