THE INFLUENCE OF SODIUM-BICARBONATE AND SULFUR AMINO-ACIDS ON THE PERFORMANCE OF BROILERS AT MODERATE AND HIGH-TEMPERATURES
THE INFLUENCE OF SODIUM-BICARBONATE AND SULFUR AMINO-ACIDS ON THE PERFORMANCE OF BROILERS AT MODERATE AND HIGH-TEMPERATURES
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DOI：
10.1071/ar9911385
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发表时间：
1991-01-01
影响因子：
--
通讯作者：
OLIVA, AG
中科院分区：
文献类型：
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作者：
BALNAVE, D;OLIVA, AG
在肥育肉鸡（3-6周龄）的饲粮或饮用水中添加碳酸氢钠（NaHCO3）可提高高温（30℃）条件下的采食量、活增重和食物效率，但在中等温度（21℃）条件下则无改善。生产性能的提高与氨基酸消化率的增加无关，氨基酸消化率在30℃条件下降低。增加饮用水的消耗似乎是在高温下提高性能的主要先决条件。在30℃条件下，饲粮中蛋氨酸与总硫氨基酸（TSAA）的比值为0.43和0.55，对肉鸡的生长和食物转化率也有影响，该比值为0.62。饲粮蛋氨酸：TSAA比为0.62时，饮水摄取量和水食摄取比均显著降低，且当饮水中含有NaHCO3时效果显著。
Supplements of sodium bicarbonate (NaHCO3) added to the diet or drinking water of finishing broilers (3-6 weeks of age) improved food intake, live weight gain and food efficiency at high (30-degrees-C), but not at moderate (21-degrees-C), temperatures. The improved performance was not related to increases in amino acid digestibilities which were reduced in birds kept at 30-degrees-C. Increased consumption of drinking water appears to be a major prerequisite for the improved performance at high temperatures. The methionine:total sulfur amino acid (TSAA) ratio of the diets also influenced broiler performance at 30-degrees-C with ratios of 0.43 and 0.55 giving superior growth and food conversion to a ratio of 0.62. The intake of drinking water and the water:food intake ratio were significantly reduced at the dietary methionine:TSAA ratio of 0.62, the effect being significant when the drinking water contained NaHCO3.