共查询到20条相似文献,搜索用时 156 毫秒
1.
2.
色氨酸是必需氨基酸之一,是动物和人体生长发育及新陈代谢中不可或缺的一种氨基酸,被称为第二必需氨基酸。随着畜牧业的发展,对色氨酸在畜禽生产中发挥作用的研究也更加深人。色氨酸对动物的采食量、生产性能以及抗应激都有显著作用。 相似文献
3.
4.
5.
6.
7.
色氨酸作为畜禽的功能性氨基酸,除了作为底物合成蛋白质外,还具有调控蛋白质代谢的功能。本文就色氨酸对蛋白质代谢的影响及调控机制作一综述。 相似文献
8.
9.
1发酵工程技术研究与应用特异微生物发酵能产生赖氨酸、蛋氨酸、色氨酸和苏氨酸。在畜禽饲料中使用外源氨基酸,可降低饲料粗蛋白水平,减少非必需氨基酸的量,改善饲料氨基酸的平衡性,使人们研究与应用畜禽饲料的“理想氨基酸平衡模型”成为可能。因而可进一步提高动物的生产性能 相似文献
10.
11.
动物色氨酸与烟酸互作关系研究进展 总被引:9,自引:0,他引:9
色氨酸和烟酸在动物体内均具有很重要的生理和生化功能 ,二者存在明显互作关系 ,色氨酸可以转化成烟酸 ,其转化效率是个动态的过程 ,受多种因素影响。通过对日粮中色氨酸与烟酸适宜的添加比例关系的研究 ,探索日粮色氨酸与烟酸之间的互作规律 ,可以为经济、合理使用这两种必需营养元素提供一个配伍模式。 相似文献
12.
1. Chicks were fed from 4 to 18 d on 40 diets containing all combinations of 8 crude protein (CP) concentrations (from 160 to 300 g/kg) and 5 tryptophan concentrations (from 7.5 to 13.5 g tryptophan/kg CP). 2. At each protein concentration there were responses in growth rate and in efficiency of food utilisation to supplementation with tryptophan. Curves were fitted to estimate the maximum response at each protein concentration. 3. The amounts of tryptophan required (g/kg) for maximum growth and maximum food efficiency were each linear functions of dietary protein concentration. The chick's requirement for tryptophan can be expressed as 12 g/kg CP. 4. It is concluded that a fixed ratio of tryptophan to protein should be specified in practical diet formulation, rather than a minimum dietary concentration of tryptophan. 相似文献
13.
蒙脱石(smectite,SM)是一种由颗粒极细的铝硅酸盐构成的层状黏土,具有吸附重金属、霉菌毒素、病原菌、细菌毒素和维护胃肠道黏膜及防治腹泻等功能。研究表明,SM能够缓解多种环境毒物对动物健康和生产造成的不利影响。饲粮中适量添加SM能提高畜禽生长和生产性能、提升畜产品品质、改善机体健康状况。文章简述SM的理化特性、主要功能及在畜禽饲粮中的最新应用进展,为SM更好地应用于饲料行业提供参考。 相似文献
14.
15.
Tryptophan requirement of growing swine as determined by the oxidation of an indicator amino acid 总被引:2,自引:0,他引:2
The tryptophan requirement of growing swine was determined using the oxidation of L-[1-14C]-phenylalanine as an indicator of the adequacy of the dietary tryptophan level. Forty crossbred boars (30 to 45 kg) were fed a basal diet containing 16% protein supplied by corn and gelatin. A series of experimental diets containing .05, .08, .10, .15, .20 and .25% L-tryptophan were prepared. The diets were supplemented with crystalline amino acids to provide 135% of the recommended levels. Release of 14CO2 was measured for 1 h following a meal of the experimental diet containing 20 microCi 14C phenylalanine. Increasing dietary tryptophan from .05 to .13% decreased release of 14CO2. Further increases in dietary tryptophan concentration did not significantly influence 14CO2 production. Regression analysis using a two-phase linear regression crossover model indicated that phenylalanine oxidation was minimized by a dietary tryptophan concentration of .13%. It was concluded that at a concentration of .13%, tryptophan was no longer limiting the retention of the other amino acids, thus this is the requirement for maximum protein retention by the young, growing boar. 相似文献
16.
17.
18.
蛋白质是动物饲粮的第二大成分,然而中国饲料蛋白质原料资源日益短缺,严重制约了畜牧业的健康可持续发展。黄粉虫(Tenebrio molitor L.)食性广、繁殖快、产出高,属于可再生的生物资源,其干物质中粗蛋白质、甲壳素、不饱和脂肪酸、维生素等含量较丰富,能够提取具有抗菌、抑炎、免疫调节等功能的生物活性物质,如抗菌肽、凝集素,且具有生长快、易规模饲养、占用土地少等优点,有望成为一种新型蛋白质饲料资源,进而缓解当前饲料蛋白质原料不足的现状。有研究表明,黄粉虫可以部分替代饲粮中的常规蛋白质饲料原料,提高畜禽生长或生产性能,改善产品品质,以及提高畜禽机体健康水平。作者阐述了黄粉虫的营养成分、畜禽对黄粉虫营养物质的消化率,在参考国内外最新研究成果的基础上综述了黄粉虫部分替代常规蛋白质饲料原料,改善畜禽生长或生产性能,提高肉禽屠宰性能,改善家禽产品品质,调节畜禽机体物质代谢,增强机体免疫和抗氧化功能以及改善肠道健康的作用,并对其在畜禽生产中的应用前景进行展望,以期为推广黄粉虫在畜牧业中的应用提供参考。 相似文献
19.
Understanding the interactions between nutrition and immune system is crucial for adjusting nutrient allowances in dietary formulations that optimize production efficiency. Among various animal proteins, fish meal (FM) is rich in protein (amino acids), readily available throughout most of the world, and competitively priced against other animal proteins (e.g. milk and blood). In addition, many researchers reported that FM is traditionally recognized as a high digestible protein with a high content of amino acids, vitamins and minerals for pigs. Supplementation of fatty acids by FM and fish oil (FO) is one strategy to modify an animal immune response. As a result of FM and FO effects, those supplementations can result in improved performance and immunity of young animals. 相似文献