Nitsan Z, Nir I, Petihi I
Br J Nutr. 1984 Jan;51(1):101-9. doi: 10.1079/bjn19840013.
The effects of feeding meals, in amounts equivalent to ad lib, intake or to 75% and 50% restriction by intubation, were studied in chicks. Growth estimated by body-weight gain and shank length was improved by tube feeding in the 50%-restricted chicks. Tube feeding increased energy retention at all feeding levels and nitrogen retention in the restricted chicks only. Body fat was increased in the full-fed chicks by intubation and decreased in the 50%-restricted chicks only. Crop and gizzard weights were increased by food restriction and by intubation. Tube-feeding increased the weight of the small intestine at all feeding levels. The activities of the digestive enzymes were lower in the pancreas and higher in the small intestine of the tube-fed chicks than in the voluntarily-fed ones at all feeding levels. It is suggested that synthesis, secretion and stability of the different pancreatic enzymes could be affected diversely by feeding regimens.
在雏鸡中研究了通过插管喂食相当于自由采食量、75%采食限制量和50%采食限制量的日粮的效果。通过体重增加和胫长估算，50%采食限制的雏鸡经插管喂食后生长得到改善。插管喂食在所有喂食水平下均提高了能量保留率，仅在采食受限的雏鸡中提高了氮保留率。全量喂食的雏鸡经插管后体脂增加，仅50%采食限制的雏鸡体脂减少。采食限制和插管均增加了嗉囊和肌胃重量。插管喂食在所有喂食水平下均增加了小肠重量。在所有喂食水平下，插管喂食雏鸡的胰腺中消化酶活性较低，小肠中消化酶活性高于自由采食雏鸡。提示不同的喂食方案可能对胰腺不同酶的合成、分泌和稳定性产生不同影响。
