The effects of thermal environment on the growth of neonatal chicks .2. The development of the viscera organs

文献类型： 外文期刊

第一作者： Lin, H

作者： Lin, H;Du, R;Gu, XH;Zhang, ZY

期刊名称：JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION-ZEITSCHRIFT FUR TIERPHYSIOLOGIE TIERERNAHRUNG UND FUTTERMITTELKUNDE （ 影响因子：2.13； 五年影响因子：2.322 ）

ISSN： 0931-2439

年卷期： 1996 年 75 卷 4-5 期

页码：

收录情况： SCI

摘要： One hundred and fifty 1-day-old Hisex male chicks were used to investigate the growth and development of viscera organs of neonatal chicks. The birds were exposed to five environments: control, 27 degrees C and 35 % RH, 27 degrees C and 85 % RH, 35 degrees C and 35 % RH, and 35 degrees C and 85 % RH. The proportion of heart, liver, crop, stomach, intestine, yolk sacs, empty body weight, and viscera weight in body weight were determined after 48 and 72 h thermal exposure. The environmental temperature had significant effects on the development of viscera organs: the chicks in the 35 degrees C environment had lower stomach, intestine and viscera weight, and higher empty body weight compared with the chicks in the 27 degrees C treatment. It is suggested that the response of neonatal chicks to the high temperature was shown in the rapid development of viscera organs, especially in the development of the gastro-intestinal tract. The humidity treatment had no significant effect on the development of viscera organs. The utilization of the yolk was nor affected by the environmental temperature or the humidity when the neonatal birds were fed. Feed intake was increased by high temperature during 48-h exposure (p < 0.05) compared with low temperature (27 degrees C). After 72-h exposure, the difference in feed intake between 35 and 27 degrees C treatment was not significant. It is suggested that the neonatal chicks could not make proper feed-intake adjustment in such a short time.

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