Gajewczyk P, Korniewicz D, Kołacz R, Dobrzański Z, Korniewicz A
Institute of Animal Breeding, Faculty of Biology and Animal Science, Wroclaw University of Environmental and Life Sciences, 38 C Chełmońskiego Str., 51-630 Wrocław, Poland.
Pol J Vet Sci. 2010;13(4):755-63. doi: 10.2478/v10181-010-0021-4.
The experimental material consisted of 42 sows divided into 3 feeding groups, each containing 14 sows fed complete compound feed varying in protein content. Protein and amino acid content of the feed fed to the control group was in compliance with Polish standards. Protein content in the experimental groups was reduced by 10% and 20%, respectively. At the same time, lysine, methionine, threonine and tryptophane content was supplemented to the level of the control group. All pregnant and lactating sows were fed individually. The condition of the sows was determined by measuring the thickness of backfat at the P2 position on days 30 and 105 of pregnancy and on day 25 of lactation. The data analyzed in the study included: the total number of piglets born, their body weight gain, milk composition, weaning-to-estrus interval and the farrowing rate. Protein content of the compound feed did not have a significant impact on the increment in backfat during pregnancy and losses during lactation. The sows fed compound feed with reduced protein content gave birth to 0.7 and 0.6 less piglets per litter than the control animals. However, due to lower losses, they bred 0.3 and 0.4 more piglets than the control sows. Average body weight of a piglet on day 21 was 0.5 kg lower in the experimental than in the control group. Dry matter, protein, fat and lactose content of the sow's milk did not depend on protein content of the feed. The weaning-to-estrus interval in the experimental groups was one day longer than in the control group. The reproductive rate accounted for 86% and was comparable in all the groups.
实验材料包括42头母猪，分为3个饲养组，每组14头，饲喂蛋白质含量不同的全价配合饲料。对照组饲喂的饲料蛋白质和氨基酸含量符合波兰标准。实验组的蛋白质含量分别降低了10%和20%。同时，将赖氨酸、蛋氨酸、苏氨酸和色氨酸的含量补充到对照组的水平。所有怀孕和哺乳的母猪均单独饲养。通过在怀孕第30天和第105天以及哺乳第25天测量P2位置的背膘厚度来确定母猪的状况。该研究分析的数据包括：出生仔猪总数、它们的体重增加、乳汁成分、断奶至发情间隔和产仔率。配合饲料的蛋白质含量对怀孕期背膘增加和哺乳期损失没有显著影响。饲喂蛋白质含量降低的配合饲料的母猪每窝产仔数比对照动物少0.7头和0.6头。然而，由于损失较低，它们比对照母猪多繁育0.3头和0.4头仔猪。实验仔猪在第21天的平均体重比对照组低0.5千克。母猪乳汁的干物质、蛋白质、脂肪和乳糖含量不取决于饲料的蛋白质含量。实验组的断奶至发情间隔比对照组长一天。繁殖率为86%，在所有组中相当。
