论文标题:不同营养水平、不同组合的全饲粮颗粒料育肥羔羊的效果
Effect of Complete Pellet Diet with Different Nutritional Levels and Different Combinations on Fattening Lambs
论文作者 金艳梅
论文导师 郝正里；李发弟,论文学位 硕士,论文专业 动物营养与饲料科学
论文单位 甘肃农业大学,点击次数 77,论文页数 30页File Size488k
2004-05-01论文网 http://www.lw23.com/lunwen_337365022/ 羔羊;肥育;全饲粮颗粒料;营养水平;饲粮组合;杂交组合;甜菜渣;消化;代谢;屠宰
Lamb; Fattening; Complete Pellet diets; Nutritional levels; Diet combinations; Crossbred; Beet pulp ;Digestion; Metabolism; Slaughter
按同质原则将28只试羊（3～3.5月龄）分为4个饲粮处理组，采用3因子（2×2×2）设计，研究两个营养水平（A因子，A1—0.9NRC和A2—0.8NRC）下不同饲粮组合（B因子，B1—添加甜菜渣和B2—不添加甜菜渣）对不同杂交组合（C因子，C1—波德代（♂）×蒙古羊（♀），C2—陶赛特（♂）×蒙古羊（♀））育肥的效果。饲养试验结果表明： A、B、C三因子对试羊平均日增重均无显著影响（P>0.05），仅正试期头20天C2日均增重显著（P<0.05）高于C1。B1正试期后20天日均增重有高于B2的趋势。与A2相比，A1水平羔羊平均日采食量极显著（P<0.01）低，而饲料转化率极显著（P<0.01）地高。正试期中从每个处理组选6只试羊进行消化代谢试验。结果表明：（1）A1水平的DMI及OMI、日排DM及OM极显著（P<0.01）低于A2，而DMD及OMD极显著（P<0.01）高于A2。B因子对DMD及OMD无显著（P>0.05）影响。C1的DMD（P=0.077）及OMD（P=0.080）也有高于C2的趋势。A、B因子的互作效应极显著（P<0.01）影响了DMI及DM消化量，均以A2B1组最高。（2）A1的TNI（P=0.097）、UTN（P=0.079）有低于A2的趋势。B因子对氮代谢无显著（P>0.05）影响。C1氮消化量（P=0.113）和氮存留量（P=0.138）有高于C2的趋势。A、B因子的互作效应显著影响TNI（P<0.05），以A2B1组最高。（3）A因子对ADFD、CELD无显著（P>0.05）影响，但A1的ADFI、CELI极显著（P<0.01）低于A2。B1 的ADFI、CELI（P<0.01）和ADFD、CELD（P<0.05）显著地高于B2。C1的ADFD（P=0.082）和CELD（P=0.089）有优于C2的趋势。A、B因子的交互作用显著影响（P<0.05）ADFI，其中以A2B1组最高。（4）A因子对Ca、P消化率无显著（P>0.05）影响。B1的粪Ca排出量（P<0.01）、粪P排出量显著（P<0.05）低于B2，而P的消化率显著（P<0.05）高于B2。C1的Ca、P消化率显著（P<0.05）高于C2。屠宰试验结果表明：A、B、C三因子及其互作效应对胴体重（依组次为：16.33、15.75、16.08、15.92kg）、屠宰率（依组次为47.31%、46.62%、46.57%、47.00%）均无显著影响（P>0.05）；A1的熟肉率极显著地（P<0.01）高于A2，B1的GR值（依组次为：11.67、11.17、11.00、12.83mm）有低于B2的趋势（P=0.183）。
This experiment was conducted to investigate the effect of complete pellet diets with two levels of DE and CP (factor A, A1, A2—0.9×, 0.8×NRC) and different diet combinations (factor B, B1, B2—with and without beet pulp) on crossbred male lambs (3~3.5 months age) of Borderdale (♂)×Mongolian (♀) (C1:16 lambs) and Poll Doset (♂)×Mongolian (♀) (C2:12 lambs). A 2×2×2 factriol designing and 28 lambs which they were divided into four groups (A1B1,A1B2,A2B1,A2B2) were used in the experiment.The results of feeding trial indicated that there were no significant difference (P>0.05) on ADG of lambs between two treatments for the factor A、factor B、 factor C and their interaction, except that during the first 20 days, the ADG of C2 was higher than that of C1 (P<0.05). Compared with A2, the intake of lambs fed on A1 was higher (P<0.01), but the FCR of A2 was much lower (P<0.01). During the last 20 days of the trial, a tendency indicated that the ADG of B1 was higher than that of B2. The results of digestion and balance were as follow:(1) the DMI、OMI、DMF and OMF of A1 was much lower (P<0.01) than that of A2, but the DMD and OMD was significantly higher (P<0.01) than that of A2. There was no significant (P>0.05) difference on DMD and OMD between B1 and B2. The DMD (P=0.077) and OMD (P=0.080) of C1 were higher than that of C2. The significant (P<0.05) effect of the interaction of factor A and factor B on DMI and the quantity of digested DM were observed, and A2B1 were highest. (2) A1 was lower than that of A2 on TNI (P=0.097) and UTN (P=0.079). There was no significant (P>0.05) effect on nitrogen metabolism bewteen B1 and B2. The quantity of digested N (P=0.113) and retentive N (P=0.138) of C1 were higher than that of C2. (3) Factor A unaffected (P>0.05) on the ADFD and CELD, but the ADFI and CELI of A1 were significantly (P<0.01) lower than that of A2. The ADFI、CELI (P<0.01) and ADFD、CELD (P<0.05) of B1 were significantly lower than that of B2. The ADFD (P=0.082) and CELD (P=0.089) of C1 were higher than that of C2. The significant (P<0.05) effect of the interaction between factor A and factor B on ADFI was observed, and A2B1 was highest. (4)No significant (P>0.05) effect of factor A on CaD and PD was find. The quantity of feces’ Ca and feces’ P (P<0.05) of B1 were much lower than B2, but the PD of B1 was significantly higher(P<0.05) than that of B2. The CaD and PD of C1 were significantly higher(P<0.05) than that of C2.The results of slaughter experiment showed that it were no significant(P>0.05) effect of factor A、factor B、factor C and their interaction on lamb carcass weight (they were 16.33、15.75、16.08、15.92Kg, respectively) and their carcass yield (they were 47.31%、46.62%、46.57%、47.00%, respectively). The cooked meat rate of A1 were much higher (P<0.01) than A2; The GR value of B1 was lower (p=0.183) than that of B2.
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