【摘要】 以绞股蓝粉为添加剂,对金陵花鸡进行饲养观察,并对绞股蓝进行急性毒性试验。饲养结果表明:绞股蓝添加剂对50~63日龄花鸡的平均日增重、料肉比、死亡率效果都很明显,特别是添加0.5%的试验组,饲料利用率比对照组高35.1%,日增重高49%,与对照组比较,差异极显著;添加1%的试验组饲养效果与对照组比较差异显著,饲料利用率比对照组高23.1%,日增重高32.4%;在其他日龄组的饲养试验中,料肉比、平均日增重与对照组比较都不明显,但可以降低鸡的死亡率,提高动物抗热应激能力;鸡肉质鉴定试验结果表明,绞股蓝粉可以改善肉质,且可以使鸡的皮肤黄色加深。绞股蓝急性毒性试验结果表明,其LD50为972.75mg/kg,证明本品为无毒级,对动物无毒副作用。绞股蓝作为一种绿色添加剂,对提高动物生产力意义重大。更多还原

【Abstract】 The powder of Gynostemma pentaphylla was used as additive to feed Jinling broiler,and the acute toxicity test of Gynostemma pentaphylla was conducted.The results showed that the effect of Gynostemma pentaphylla additive on the average daily increase weight,ratio of feed to meat and death rate of broiler with 50-63 growth days were very obvious,especially in the 0.5% treatment group,the difference was very significant as compared to the control,and the feed application rate was 35.1% higher than that of the control,the daily increase weight was 49% higher than that of the control.Moreover,the difference between 1% treatment group and the control was also significant,the feed application rate of 1% treatment group increased 23.1% and the daily increase weight increased 32.4%.For other groups of different growth days of broiler,the difference in the ratio of feed to meat and the average daily increase weight was not obvious as compared to the control,but it could decrease the death rate and increase the anti-heat stress ability for broiler.The results of chicken meat identification showed that Gynostemma pentaphylla could improve the chicken meat quality and deepen the yellow of skin.The results of acute toxicity test indicated that the LD50 of Gynostemma pentaphylla was 972.75 mg/kg,and the tested Gynostemma pentaphylla was of nontoxic grade and no toxic effect on animal.Therefore,as a green additive,Gynostemma pentaphylla has significant importance for increasing the animal productivity.更多还原