CAJ | 학술논문

为探索舍饲辽宁绒山羊对蛋白质的营养需要,采用单因子试验方法,选取辽宁绒山羊2周岁母羊15只,随机分为3组,每组5只,研究日粮不同蛋白水平(9.26%、10.06%、11.02%)对辽宁绒山羊产绒性能及消化代谢的影响.结果表明:日粮蛋白水平对辽宁绒山羊产绒性能无显著影响(P>0.05),日粮蛋白水平达到9.26%时,就能满足辽宁绒山羊山羊绒生长需要,日粮蛋白水平为10.06%,产绒量最高,为453.2 g,羊绒长度和绒层厚度也最高,羊绒细度最细,分别为5.72,5.31 cm和15.26 μm,但各组间差异不显著(P>0.05),可能是由于绒山羊个体间差异所致;日粮蛋白水平11.02%组,尿氮、可消化氮、沉积氮、氮表观沉积率均最大,分别为3.13,8.07,4.94 g/d和43.94%,均显著高于蛋白水平9.26%组和10.06%组(P<0.05),粪氮最小,为3.17 g/d,显著低于其余2组.从氮平衡来看,3组均为正平衡,能够不同程度地促进山羊绒的生长;日粮蛋白水平对粗纤维消化率无显著影响(P>0.05);日粮蛋白水平对能量消化代谢无显著影响 (P>0.05).配制辽宁绒山羊日粮,粗蛋白水平以11.02%为宜.
위탐색사사료녕융산양대단백질적영양수요,채용단인자시험방법,선취료녕융산양2주세모양15지,수궤분위3조,매조5지,연구일량불동단백수평(9.26%、10.06%、11.02%)대료녕융산양산융성능급소화대사적영향.결과표명:일량단백수평대료녕융산양산융성능무현저영향(P>0.05),일량단백수평체도9.26%시,취능만족료녕융산양산양융생장수요,일량단백수평위10.06%,산융량최고,위453.2 g,양융장도화융층후도야최고,양융세도최세,분별위5.72,5.31 cm화15.26 μm,단각조간차이불현저(P>0.05),가능시유우융산양개체간차이소치;일량단백수평11.02%조,뇨담、가소화담、침적담、담표관침적솔균최대,분별위3.13,8.07,4.94 g/d화43.94%,균현저고우단백수평9.26%조화10.06%조(P<0.05),분담최소,위3.17 g/d,현저저우기여2조.종담평형래간,3조균위정평형,능구불동정도지촉진산양융적생장;일량단백수평대조섬유소화솔무현저영향(P>0.05);일량단백수평대능량소화대사무현저영향 (P>0.05).배제료녕융산양일량,조단백수평이11.02%위의.
In order to investigate the feeding standardization of protein, by means of one-factor experiment, 15 healthy 2-year-old female Liaoning cashmere goats were randomly divided into 3 groups, 5 in every group, to study the effects of different protein levels (9.26%,10.06%,11.02%) on production of cashmere and digestion and metabolism. The results showed that dietary protein levels had no significant effect on performance of cashmere (P>0.05);retained N was 4.94 g/d respectively in group Ⅲ, significantly higher than that of the other two groups (P<0.05). There was no significant difference (P>0.05) of CF digestibility and GE metabolism among the three tested groups. It was suggested that the dietary protein level was 11.02% for feed-lot Liaoning cashmere goat.