【作者】 杨绒；

【导师】 龚月生；

【作者基本信息】 西北农林科技大学 ， 动物营养与饲料科学， 2011， 硕士

【摘要】 本试验旨在研究性别对8种蛋鸡饲料代谢利用的影响。选用24周龄尼克粉公母鸡,结合套算法分别测定甘薯干、米糠、粟、糙米4种能量饲料和葵花饼、酒糟、玉米蛋白粉、DDGS 4种蛋白原料的表观代谢能、粗蛋白代谢率、干物质及粗脂肪的代谢率。结果表明:用尼克粉鸡测得能量原料米糠、糙米表观代谢能公母间差异显著(P<0.05),母鸡测得的平均结果比公鸡分别高出0.61MJ/kg、1.03MJ/kg,甘薯干、粟和葵花饼、酒糟、玉米蛋白粉、DDGS 4种蛋白原料的表观代谢能公母间差异不显著(P>0.05),表观代谢能总体表现为母鸡高于公鸡;由米糠、糙米、葵花饼、酒糟、玉米蛋白粉测定的代谢能均低于中国饲料数据库(2009)所给出的鸡饲料代谢能,而甘薯干、粟、DDGS所测结果恰好相反;米糠和酒糟、DDGS公母间粗蛋白代谢率差异显著(P<0.05),母鸡测得的结果分别比公鸡高5.52%,8.75%、9.86%,葵花饼的粗蛋白代谢率公母间差异极显著(P<0.01),母鸡比公鸡高6.22%,甘薯干、粟、糙米和玉米蛋白粉的粗蛋白代谢率差异不显著(P>0.05),母鸡测得的平均结果均高于公鸡;干物质代谢率除糙米在性别间差异显著外(P<0.05),其他7种原料均无显著差异(P>0.05);粗脂肪代谢率在所有处理组间均差异不显著(P>0.05)。说明性别对蛋鸡饲料营养价值评定有影响。试验还发现,公母鸡在采食量上存在差异,母鸡的采食量极显著高于公鸡(P<0.01),而体重变化上,公母鸡在试验前后均表现差异不显著,二者体重总体呈现增加的趋势,公鸡的增重幅度大于母鸡。更多还原

【Abstract】 Experiments were conducted to investigate the effect of sex of 24-wk-old Nick Pink on apparent metabolizable of eight feedstuffs. Protein and energy of basal diet were substituted separately by dried sweet potatoes, rice bran, pearl millet and brown rice as energy supplements while sunflowers meal, sorghum-distiller’s grains, corn gluten meal and corn-distillers dried grains with soluble (DDGS) as protein supplements. The results showed that the difference of AME between roosters and laying hens on energy feeds like rice bran and brown rice for Nick Pink was significant(P<0.05) , and the average results on laying hens were higher than roosters of that by 0.61 MJ / kg and 1.03 MJ / kg, respectively. There was no significant difference on sex of AME of sweet potatoes, millet and sunflower meal, sorghum-distiller’s grains, corn gluten meal and DDGS (P>0.05). All the AME of hens were higher than roosters of that. The AME of rice bran, brown rice, sunflower meal, sorghum-distiller’s grains and corn gluten meal were all lower than the reference value from the Chinese feed database (2009), as while as dried sweet potatoes, pearl millet and DDGS got the opposite results exactly.Apparent metabolic rate of crude protein of rice bran and sunflowers meal, sorghum-distiller’s grains and DDGS three protein supplements between the male and female was significantly (P<0.05), and the average results on laying hens were higher than roosters of that by 5.52%、6.22%、8.75%、9.86%, respectively, while corn gluten meal and the rest of three energy supplements such as sweet potato, millet and brown rice was not significant between the sex of the bird(P>0.05). All the apparent metabolic rate of crude protein of hens was higher than roosters of that. Except for brown rice, the apparent metabolic rate of dry matter of was significantly (P<0.05), and the other 7 kinds of feedstuffs were not significantly different (P>0.05).The metabolism rate of ether extract were not significantly (P>0.05) in all treatments. It can come to the conclusion that sex is influential to the layer feedstuffs metabolism. By the way, the food intake was different between sex.Hen’s feed intake was extremely higher than the cock’ (P<0.01).But the body weight have got a non-significant gain during the whole trial (P>0.05). Cocks have got a large body gain than hens’.更多还原