Katongole J B, March B E
Poult Sci. 1980 Apr;59(4):819-27. doi: 10.3382/ps.0590819.
New Hampshire chicks utilized dietary fat more efficiently than did broiler-type or White Leghorn chicks. The difference was more pronounced with tallow than with corn oil. Utilization of fat by all three types of chicks increased until the chicks were about six weeks old. At hatching, the concentration of fatty acid binding protein (FABP) in the intestine of the broiler-type chicks was significantly less than in the New Hampshire and White Leghorn chicks. Concentration of FABP declined during the first 1 to 2 weeks of life and then increased. By four weeks of age the breed differences in concentration of FABP in the intestine were no longer apparent. At some time after four weeks of age, FABP reached maximum concentrations in the intestinal tissue of the chicks of different breeds and thereafter declined as a proportion of the total intestinal tissue. Broiler-type chicks, which did not utilize fat as efficiently as did New Hampshire chicks in the first weeks of life, displayed lower concentrations in the proximal third of the intestine and higher concentrations in the remainder of the intestine than was the case with the New Hampshire chicks. A high level of dietary fat or dietary supplementation with sodium taurocholate increased the concentration of FABP in the intestine.
新罕布什尔鸡比肉鸡型或白来航鸡更有效地利用膳食脂肪。这种差异在使用牛脂时比使用玉米油时更为明显。所有三种类型的鸡对脂肪的利用率都会增加，直到鸡大约六周龄。在孵化时，肉鸡型鸡肠道中脂肪酸结合蛋白（FABP）的浓度明显低于新罕布什尔鸡和白来航鸡。FABP的浓度在出生后的前1至2周下降，然后上升。到四周龄时，不同品种鸡肠道中FABP浓度的差异不再明显。在四周龄后的某个时间，FABP在不同品种鸡的肠道组织中达到最高浓度，此后作为肠道组织总量的比例下降。在生命的最初几周内，肉鸡型鸡不像新罕布什尔鸡那样有效地利用脂肪，与新罕布什尔鸡相比，其在肠道近端三分之一处的浓度较低，而在肠道其余部分的浓度较高。高水平的膳食脂肪或牛磺胆酸钠膳食补充剂会增加肠道中FABP的浓度。
