营养限制对育成公羊血液中IgG、SUN、T_3和T_4的影响

Effect of nutritional restriction on blood T_3,T_4,IgG and SUN of Ujimqin growing rams

本试验以乌珠穆沁育成公羊为研究对象，在中国北方典型草原地区冬春季节以 4因素 3水平的 L9(34)正交试验研究能量限制、蛋白质限制、限制开始时间、限制持续时间对育成公羊血液中 IgG、 SUN、 T3和 T4的影响规律 .研究结果表明，育成公羊血液中 T3和 IgG浓度的变化受试验分期、环境温度和代谢能、可消化粗蛋白食入量的影响 (P0.05)，但能够与能量、蛋白质存留量一同反映试验羊在限制最严重时的体况 .

We studied the effect of restriction of energy, protein, restriction starting time and duration on blood T3, T4 IgG and SUN of Ujimqin growing rams in cold season in the typical grassland of northern China by orthogonal design(L9(34)). The result indicated that the concentration of T3 and IgG were influnced by the experimental periods, temperature and intake of ME and DCP. SUN and T4 have homestasis and were not influenced by those factors. T3, T4,IgG, SUN and ME, DCP could reflect the restriction status of Ujimqin growing rams.