Herzig I, Razsyk J, Toulová M
Vet Med (Praha). 1976 Jan;21(1):1-9.
In two experiments carried out with 280 broiler chickens, 20 to 30 days old, the authors studied the effect of a sudden and stage-like change-over from a diet with 20% of nitrogen compounds to a diet with 10% of nitrogen compounds. In both variants of the experiment there was a slowing down of the weight increment, increase of the adrenal weight, reduction of the weight of spleen, of Fabricius weight, heterophilia and lymphopenia. A stage-like change-over of the diet had a more moderate effect. In the activity of the liver enzymes amino transferases of aspartate, alanine and succine-dehydrogenase -the authors found a different character of the changes in both variants of the experiment. The reduction of nitrogen compounds in the diet of growing chickens causes also changes which are typical for an increased adrenocortical activity.
在对280只20至30日龄的肉鸡进行的两项实验中，作者研究了从含20%氮化合物的日粮突然阶段性转换为含10%氮化合物的日粮所产生的影响。在实验的两个变体中，均出现体重增加放缓、肾上腺重量增加、脾脏重量、法氏囊重量、嗜异性粒细胞减少和淋巴细胞减少。日粮的阶段性转换影响更为温和。在肝脏酶天冬氨酸氨基转移酶、丙氨酸氨基转移酶和琥珀酸脱氢酶的活性方面，作者发现在实验的两个变体中变化特征不同。生长鸡日粮中氮化合物的减少也会引起一些变化，这些变化是肾上腺皮质活动增强的典型表现。
