摘要
本试验旨在研究不同钙水平日粮对泌乳期云南半细毛羊能量代谢的影响。选取50只年龄接近的经产二胎云南半细毛羊做同期发情处理,产羔前15 d按体重随机分为5个处理组,每组10只母羊,各组试验羊饲喂钙水平分别为0.35%、0.42%、0.61%、0.75%和0.96%,日粮其他营养成分保持一致。正试期90 d。结果表明:①消化能和代谢能:在泌乳前期、中期和后期,0.42%、0.75%和0.96%钙水平组显著或极显著高于0.35%和0.61%钙水平组(P<0.05;P<0.01)。②泌乳净能:泌乳前期不同钙水平组差异不显著(P>0.05);中期0.42%和0.96%钙水平组显著高于0.35%钙水平组(P<0.05);后期0.35%钙水平组最低,其余4个钙水平组间差异不显著(P>0.05)。③总能消化率:泌乳前期0.35%和0.96%钙水平组显著高于0.42%钙水平组(P<0.05);中期0.35%钙水平组显著高于0.42%和0.75%钙水平组(P<0.05);后期不同钙水平组间无显著差异(P>0.05)。④总能代谢率:泌乳前期和后期不同钙水平组差异均不显著(P>0.05);中期0.35%钙水平组显著高于0.42%、0.61%和0.75%钙水平组(P<0.05)。⑤消化能代谢率:泌乳前期0.75%钙水平组比0.61%和0.96%钙水平组显著增加(P<0.05);中期0.35%钙水平组显著高于0.96%钙水平组(P<0.05);后期不同钙水平日粮组间差异不显著(P>0.05)。综上所述,无论在泌乳前期、中期还是后期,云南半细毛羊母羊的消化能和代谢能摄入量均以0.42%钙水平组最佳,泌乳中期泌乳净能以0.42%钙水平组最高,泌乳前期和中期总能消化率则以0.35%钙水平组最高,泌乳中期总能代谢率、消化能代谢率均以0.35%钙水平组最高。因此,日粮钙水平在0.35%~0.42%之间时有利于云南半细毛羊泌乳期母羊的有效能摄入量和能量的利用效率。
The purpose of this experiment was to study the effect of different calcium(Ca)levels on energy metabolism of Yunnan semi-fine wool sheep during lactation.50 Yunnan semi-fine wool sheep were randomly divided into 5 groups according to their weights 15 days before lambing.Each group was fed with 10 ewes.The calcium levels of each group were 0.35%,0.42%,0.61%,0.75%and 0.96%respectively.The normal trial period was 90 days.The results showed that:①DE and ME:0.42%,0.75%and 0.96%Ca level groups were significantly higher than 0.35%and 0.61%Ca level groups(P<0.05;P<0.01).②Net energy of lactation(NEL):There were no significant difference in different Ca levels of diets in the early lactation period(P>0.05);In the middle period,0.42%and 0.96%Ca level groups were significantly higher than 0.35%Ca level group(P<0.05).In the later period,0.35%Ca level group was the lowest,and there were no significant difference among the other four Ca level groups(P>0.05).③DE/GE:0.35%and 0.96%Ca levels in the early lactation group were significantly higher than 0.42%Ca levels(P<0.05).0.35%Ca levels in the middle lactation group were significantly higher than 0.42%and 0.75%Ca levels(P<0.05).There was no significant difference between different Ca levels in the later lactation group(P>0.05).④ME/GE:There was no significant difference in different Ca levels in the early and late lactation(P>0.05).In the middle stage,0.35%Ca level group was significantly higher than 0.42%,0.61%and 0.75%Ca level groups(P<0.05).⑤ME/DE:0.75%Ca level group in the early lactation period was significantly higher than 0.61%and 0.96%Ca level groups(P<0.05).0.35%Ca level group in the middle period was significantly higher than 0.96%Ca level group(P<0.05).There were no significant difference under different Ca level diets in the later period(P>0.05).In conclusion,no matter in the early stage,middle stage or later stage of lactation,the intake of digestive energy and metabolizable energy of Yunnan semi-fine wool sheep were the best in the 0.42%Ca level group,the highest in the 0.42%Ca level group in the middle stage of lactation,the highest in the 0.35%Ca level group in the early and middle stage of lactation,and the highest in the 0.35%Ca level group in the middle stage of lactation.Therefore,when the dietary Ca level was between 0.35%and 0.42%,it was beneficial to the effective energy intake and energy utilization efficiency of Yunnan semi-fine wool ewes during lactation.
作者
欧阳依娜
李银江
李卫娟
薛白
王思宇
梁家充
洪琼花
OUYANG Yina;LI Yinjiang;LI Weijuan;XUE Bai;WANG Siyu;LIANG Jiachong;HONG Qionghua(Yunnan Animal Science and Veterinary Institute,Kunming 650224,China;Animal Nutrition Institute,Sichuan Agricultural University,Wenjiang 611130,China)
出处
《中国畜牧兽医》
CAS
北大核心
2020年第2期416-424,共9页
China Animal Husbandry & Veterinary Medicine
基金
国家现代农业绒毛用羊产业技术体系专项资金资助(CARS-39)
省科技人才和平台计划(2018IC108)
云南省科技创新人才计划(2018HC017)
关键词
云南半细毛羊
泌乳期
钙
能量代谢
Yunnan semi-fine wool sheep
lactation
calcium
energy metabolism
