Jentsch W, Beyer M, Hoffmann L, Schiemann R
Forschungszentrum für Tierproduktion Dummerstorf-Rostock, Bereich Tierernährung Oskar Kellner.
Arch Tierernahr. 1991 May;41(4):395-409. doi: 10.1080/17450399109428480.
Studies of the energy metabolism at maintenance and growth levels after the feeding of rations with a crude protein content of 17-24% and 44-47% resp. were carried out with hybrid pigs of line 150 in the live weight range between 10 and approximately 50 kg. This paper gives information on the methods and the outlay of the experiment and presents results concerning feed intake, live weight development and digestibility. Feed intake increased on average with growing live weight by 30-35 g DM/kg live weight. Feed conversion ranged from 1.2 to 1.8 kg DM/kg live weight gain in the first period and from 2.3 to 3.2 kg DM/kg live weight gain in the last period. The digestibility of the energy in the rations with a crude protein content of between 17 and 24% averaged 80% and that of the rations with a crude protein content of 44-47% averaged 86%. In the course of ontogenetic development the digestibility increased up to about 30 kg LW. The influence of the nutritional level on the level of digestibility was unequal in the experiments. In one experiment a decrease (1% unit) and in two experiments an increase (1-3% units) of the digestibility after the feeding of growth level in contrast to maintenance level could be observed. The change of rations with a varying protein content did not result in an influence on the digestibility level in comparison with the constant feeding of one ration.
分别用粗蛋白含量为17 - 24%和44 - 47%的日粮对体重在10至约50千克之间的150系杂交猪进行维持水平和生长水平能量代谢的研究。本文介绍了实验方法和费用，并给出了有关采食量、体重增长和消化率的结果。采食量平均随着体重增加而增加，每千克体重增加30 - 35克干物质。第一阶段的饲料转化率为每千克体重增加1.2至1.8千克干物质，最后阶段为每千克体重增加2.3至3.2千克干物质。粗蛋白含量在17%至24%之间的日粮能量消化率平均为80%，粗蛋白含量为44 - 47%的日粮能量消化率平均为86%。在个体发育过程中，消化率在体重约30千克时达到最高。在实验中，营养水平对消化率水平的影响并不相同。在一项实验中观察到，与维持水平相比，饲喂生长水平日粮后消化率下降了1个百分点；在两项实验中观察到，饲喂生长水平日粮后消化率提高了1至3个百分点。与持续饲喂一种日粮相比，改变日粮蛋白质含量并未对消化率水平产生影响。
