Bergner U, Dmitrocenko A P
Arch Tierernahr. 1977 Jul;27(7):409-19. doi: 10.1080/17450397709426748.
A diet of equal composition (88% barley, 5% extracted sunflower meal, 3% fishmeal and 3% yeast) was subjected to 9 different forms of thermal treatment and fed to experimental pigs. The biological value of the proteins was found to decline from 65.9 below 50. The amino acid balance of the digestive tract ("true digestibility of amino acids" according to other authors) proved to deteriorate due to the thermal treatment. The individual amino acids always revealed highly significant positive correlations with the apparent digestibility of crude protein. This finding is related with the often demonstrated fact that the fecal protein always has a constant amino acid composition, irrespective of feed protein and, consequently, only influences the quantitative fecal protein secretion, i. e. the amino acid balance of the digestive tract which is suggested to be the cause of the mathematical relations shown.
将一种成分相同的日粮（88%大麦、5%膨化向日葵粕、3%鱼粉和3%酵母）进行9种不同形式的热处理，然后喂给实验猪。结果发现蛋白质的生物学价值从65.9降至50以下。消化道的氨基酸平衡（根据其他作者的说法为“氨基酸真消化率”）被证明因热处理而恶化。单个氨基酸始终与粗蛋白的表观消化率呈高度显著的正相关。这一发现与经常被证明的事实有关，即粪便蛋白质的氨基酸组成始终恒定，与饲料蛋白质无关，因此仅影响粪便蛋白质的定量分泌，即消化道的氨基酸平衡，这被认为是所示数学关系的原因。
