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饲料酸化剂的应用日益广泛,在替代抗生素方面具有重要的作用,其主要作用机制在于提高消化酶活性、调控微生物菌群平衡及杀菌抑菌作用等。因此酸化剂在饲料中替代抗生素具有一定的优势。 相似文献
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饲料酸化剂在猪饲料中应用日益普及,酸化剂在家禽饲料中亦具有多种作用.针对有机酸化剂在家禽保健方面的应用进行概述。 相似文献
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不同种类酸化剂对早期断奶仔猪生产性能和血液生化指标影响的研究 总被引:5,自引:0,他引:5
目前,在早期断奶仔猪饲料中添加酸化剂已得到了较普遍应用,但是有关这些酸化剂的作用效果报道不一,不同类型酸化剂的作用效果也有差异,各种酸化剂的作用机理不尽相同。某些血液生化指标可以较准确地反映动物体内蛋白质等营养物质的代谢情况,而在饲料中添加酸化剂对断奶仔猪血液生化指标的影响,目前报道很少。本次试验研究添加柠檬酸、磷酸、复合酸,比较不同酸化剂对断奶仔猪生产性能及血液生化指标的影响,以探讨酸化剂的作用机理。为阐明酸化剂的作用及机理提供试验数据,为酸化剂的科学使用提供理论依据。试验研究选择了28±2日龄断奶约克夏… 相似文献
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饲料酸化剂在家禽生产中的应用 总被引:3,自引:3,他引:3
饲料酸化剂是指能够酸化饲料的一类物质。最初人们应用饲料酸化剂往往仅作为改善饲料适口性的一种风味添加剂,随着科学的发展,人们对酸化剂在动物生产上的作用有了更深的认识。饲料酸化剂可改善消化道pH环境,保障动物有良好的消化环境,使饲料组分在体内被充分消 相似文献
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酸化剂作为提高饲料酸度,提高饲料消化利用率的添加剂,在饲料工业上应用日益广泛。文章从酸化剂的发展历史、分类、作用机理、应用及发展前景方面进行了综述。 相似文献
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用淘汰育成绵羊和成年绵羊同时进行两个试验,分别研究用缓释尿素替代部分饲料蛋白质和以不同饲养水平肥育绵羊的效果。试验1的结果表明,可以用缓释尿素替代部分植物性蛋白质饲料肥育育成绵羊;试验2结果说明,用低营养和较高营养水平日粮肥育成年绵羊的效果差别不大。 相似文献
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小麦代替不同比例玉米并添加酶制剂对育肥蛋公雏饲喂效果的影响 总被引:2,自引:0,他引:2
为了探讨在玉米—豆粕型日粮中小麦代替部分玉米并添加酶制剂对育肥蛋公雏的饲喂效果,我们用1 日龄新罗曼蛋公雏为试验动物, 用小麦代替玉米用量的1/3 和2/ 3 并添加好特美 X 或华芬酶Ⅰ,试验期70 天。结果表明:小麦代替不同比例的玉米并添加酶制剂后, 对其成活率和采食量无影响, 但腿部色泽随玉米用量减少黄色度下降。用小麦代替玉米用量的1/ 3 和2/ 3 并添加好特美 X , 对育肥蛋公雏的日增重、饲料报酬有促进作用, 经济效益也好于玉米—豆粕型日粮, 但发现用小麦代替玉米用量的2/ 3 时腿部色泽较浅, 影响商品性。用小麦代替1/ 3 和2/ 3 的玉米并添加华芬酶 I, 前者有利于育肥蛋公雏的增重和提高饲料报酬, 后者可导致日增重和饲料报酬下降,2 种代替比例并添加华芬酶 I 经济上均不合算。因此目前情况下, 综合考虑, 以小麦代替1/ 3 玉米并添加好特美 X 在生产上有推广意义。 相似文献
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《动物营养(英文)》2015,(3)
Use of feed antibiotics as growth promoters for control of pathogens associated with monogastric food animal morbidity and mortality has contributed to the development of antimicrobial resistance, which has now become a threat to public health on a global scale. Presently, a number of alternative feed additives have been developed and are divided into two major categories, including 1) the ones that are supposed to directly and indirectly control pathogenic bacterial proliferation; and 2) the other ones that are intended to up-regulate host gut mucosal trophic growth, whole body growth performance and active immunity. A thorough review of literature reports reveal that efficacy responses of current alternative feed additives in replacing feed antibiotics to improve performances and gut health are generally inconsistent dependent upon experimental conditions. Current alternative feed additives typically have no direct detoxification effects on endotoxin lipopolysaccharides(LPS) and this is likely the major reason that their effects are limited. It is now understood that pathogenic bacteria mediate their negative effects largely through LPS interactions with toll-like receptor 4, causing immune responses and infectious diseases. Therefore, disruptive biological strategies and a novel and new generation of feed additives need to be developed to replace feed antibiotic growth promoters and to directly and effectively detoxify the endotoxin LPS and improve gut health and performance in monogastric food animals. 相似文献
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选取杜×长×大三元杂断奶仔猪171头作为实验动物,研究木瓜蛋白酶的添加和苜蓿替代部分豆粕后对断奶仔猪腹泻、生产性能的影响。结果表明:添加木瓜蛋白酶后对仔猪的生长有促进作用,平均日采食量增加2.7%、平均日增重提高2.56%、料重比分别提高2.7%、2.56%和降低1.6%。添加木瓜蛋白酶并用苜蓿替代5%的豆粕对仔猪的生长也有促进作用,平均日采食量增加10.8%、平均日增重提高7.69%、料重比降低1.03%。 相似文献
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Bruce R Charlton Asheesh K Tiwary Arthur A Bickford Mike Filigenzi 《Journal of veterinary diagnostic investigation》2005,17(3):286-288
Rapid depigmentation of brown eggs is an infrequent but startling event in the commercial egg industry that can result in significant economic losses. Loss of shell pigment in brown-shelled eggs is caused by various factors. In many cases, the exact cause of flock-wide pigment loss remains undetermined. A rapid decline in shell pigmentation was observed in 2 flocks of Hyline brown layers. The lack of evidence of an infectious disease process suggested a feed or management problem. On the basis of a small-scale, "in-house" feeding trial, the feed was identified as the cause of depigmentation. Feed analysis by liquid chromatography with mass spectrometry confirmed the presence of 4,4'-dinitrocarbanilide, a major component of nicarbazin (NCZ). There was no evidence of increased mortality, and only a slight but transient drop in the egg production was observed. Depigmentation effects were rapidly reversed after replacing the feed with NCZ-free feed. 相似文献