The optimum levels of Lysine and Glutamine needed for growth performance and maintenance of the chicken broilers were evaluated in a randomized 3 × 4 factorial arrangement of dietary treatments. The battery cages...The optimum levels of Lysine and Glutamine needed for growth performance and maintenance of the chicken broilers were evaluated in a randomized 3 × 4 factorial arrangement of dietary treatments. The battery cages measured 99 × 66 × 25 cm that can be sufficient for 5 birds. Day old Chicken broilers totaling 180 were assigned to dietary treatments comprising of 3 concentrations of Lysine (0.85, 1.14, and 1.42) each in combination with 4 concentrations of Glutamine (0, 1, 2, and 3). Each dietary treatment was replicated 3 times and each replication had 5 birds. The birds were given feed and water ad libitum with a 23-hour light regimen for a period of 4 weeks. Then, the experimental birds were evaluated for body weight gain, feed consumption, and feed conversion in order to determine their optimum requirement for dietary Lysine and Glutamine. Based on the findings of this study, the highest performance was observed in birds fed the diet supplemented with 1.42 lysine and 1% glutamine, but the highest improvement in feed conversion was observed in diet contain 1.14 and 1.42 with 1% and 3% glutamine, respectively. Birds fed 1.42 lysine and 1% glutamine had the highest total body weight gain and feed consumption. The lysine requirements in the diet for Chicken are between 1.14 and 1.42 with glutamine level of 1%.展开更多
为研究大骨鸡和AA+肉鸡的骨骼性状差异以及骨形态发生蛋白2(BMP2)mRNA的表达与骨骼性状的相关性,选取大骨鸡和AA+肉鸡1日龄公雏鸡进行舍饲笼养,在0~7周龄(w)随机挑选大骨鸡和AA+肉鸡各5只,在8~24 w随机挑选大骨鸡5只,限饲12 h后进行屠...为研究大骨鸡和AA+肉鸡的骨骼性状差异以及骨形态发生蛋白2(BMP2)mRNA的表达与骨骼性状的相关性,选取大骨鸡和AA+肉鸡1日龄公雏鸡进行舍饲笼养,在0~7周龄(w)随机挑选大骨鸡和AA+肉鸡各5只,在8~24 w随机挑选大骨鸡5只,限饲12 h后进行屠宰。屠宰后对其股骨、胫骨和跖骨的重量、长度和强度进行测定,并采用实时荧光定量PCR方法检测胫骨组织中BMP2 mRNA相对表达量。结果显示:0~24 w大骨鸡和0~7 w AA+肉鸡的股骨、胫骨及跖骨的重量、长度和强度均呈现相似但不同的生长趋势和回归公式。按体重相近原则,建立了0~24 w大骨鸡和0~7 w AA+肉鸡周龄配对表。大多数配对周龄中,大骨鸡各骨骼重量、长度和强度均极显著高于AA+肉鸡(P<0.01)。大骨鸡和AA+肉鸡胫骨组织BMP2基因相对表达量与骨骼性状均呈现极显著正相关(P<0.01)。4~7 w AA+肉鸡BMP2 mRNA相对表达量均极显著高于大骨鸡(P<0.01)。提示:BMP2可能是影响鸡骨骼生长的重要功能基因。展开更多
文摘The optimum levels of Lysine and Glutamine needed for growth performance and maintenance of the chicken broilers were evaluated in a randomized 3 × 4 factorial arrangement of dietary treatments. The battery cages measured 99 × 66 × 25 cm that can be sufficient for 5 birds. Day old Chicken broilers totaling 180 were assigned to dietary treatments comprising of 3 concentrations of Lysine (0.85, 1.14, and 1.42) each in combination with 4 concentrations of Glutamine (0, 1, 2, and 3). Each dietary treatment was replicated 3 times and each replication had 5 birds. The birds were given feed and water ad libitum with a 23-hour light regimen for a period of 4 weeks. Then, the experimental birds were evaluated for body weight gain, feed consumption, and feed conversion in order to determine their optimum requirement for dietary Lysine and Glutamine. Based on the findings of this study, the highest performance was observed in birds fed the diet supplemented with 1.42 lysine and 1% glutamine, but the highest improvement in feed conversion was observed in diet contain 1.14 and 1.42 with 1% and 3% glutamine, respectively. Birds fed 1.42 lysine and 1% glutamine had the highest total body weight gain and feed consumption. The lysine requirements in the diet for Chicken are between 1.14 and 1.42 with glutamine level of 1%.
文摘为研究大骨鸡和AA+肉鸡的骨骼性状差异以及骨形态发生蛋白2(BMP2)mRNA的表达与骨骼性状的相关性,选取大骨鸡和AA+肉鸡1日龄公雏鸡进行舍饲笼养,在0~7周龄(w)随机挑选大骨鸡和AA+肉鸡各5只,在8~24 w随机挑选大骨鸡5只,限饲12 h后进行屠宰。屠宰后对其股骨、胫骨和跖骨的重量、长度和强度进行测定,并采用实时荧光定量PCR方法检测胫骨组织中BMP2 mRNA相对表达量。结果显示:0~24 w大骨鸡和0~7 w AA+肉鸡的股骨、胫骨及跖骨的重量、长度和强度均呈现相似但不同的生长趋势和回归公式。按体重相近原则,建立了0~24 w大骨鸡和0~7 w AA+肉鸡周龄配对表。大多数配对周龄中,大骨鸡各骨骼重量、长度和强度均极显著高于AA+肉鸡(P<0.01)。大骨鸡和AA+肉鸡胫骨组织BMP2基因相对表达量与骨骼性状均呈现极显著正相关(P<0.01)。4~7 w AA+肉鸡BMP2 mRNA相对表达量均极显著高于大骨鸡(P<0.01)。提示:BMP2可能是影响鸡骨骼生长的重要功能基因。
