水解羽毛粉营养价值的研究

A STUDY ON THE NUTRITIVE VALUE OF HYDROLYZED FEATHER MEALS

为了评定水解羽毛粉的营养价值,本研究测定了10批产品和试验样本的营养成分、表现代谢能及胃蛋白酶消化率。结果表明,水解羽毛粉平均干物质含粗蛋白质89.4±1.9％,粗脂肪1.5±0.4％,粗纤维1.5±0.7％,粗灰分6.8±2.0％,表观代谢能为11.69±0.66MJ/kg,粗蛋白质的胃蛋白酶消化率为83.9±3.6％。水解羽毛粉含有动物所需要的全部必需氨基酸,但赖氨酸、蛋氨酸和组氨酸不足。产品的胱氨酸含量随蒸气压力增大和蒸煮时间延长而明显减少,胃蛋白酶消化率随之提高。饲养试验证明,在肉用仔鸡饲粮中添加2.5～4.5％的水解羽毛粉,在保持氨基酸平衡时对鸡的增重和饲料耗用比(饲料/增重)有良好的影响。

The nutrients , apparent metabolizable energy and pepsin digestibility of ten products and experimental samples were determined to evaluate the nutritive value of hydrolyzed feather meals. The results were as follows: the hydrolyzed feather meals contained on the average 89. 4±1. 9% crude protein, 1. 5±0. 4% ether extract, 1. 5± 0. 7% crude fibre, 6. 8±2. 0% ash (DM basis), the apparent metabolizable energy value was 11. 69±0. 66 MJ/ kg (DM basis) , the pepsin digestibility was 83. 9±3. 6%. The hydrolyzed feather meals contained all essential amino acids needed by animals, but lysine, methionine and histidine were deficient.The cystine content was significantly decreased and pepsin digestibility was improved by increased pressure and time of the processing. The feeding trial indicated that the hydrolyzed feather meals when supplemented at 2. 5% to 4. 5% in broiler diets while balancing the amino acids, had a positive effect on the weight gain and feed, gain ratio of the broilers.