不同钙水平日粮对云南半细毛羊泌乳期能量代谢的影响

doi:10.16431/j.cnki.1671-7236.2020.02.012

Abstract

Abstract: 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:① DE 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).② Net 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).③ DE/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).④ ME/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).⑤ ME/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.

Key words: Yunnan semi-fine wool sheep; lactation; calcium; energy metabolism

CLC Number:

S826.8

OUYANG Yina, LI Yinjiang, LI Weijuan, XUE Bai, WANG Siyu, LIANG Jiachong, HONG Qionghua. A Effects of Different Dietary Calcium Levels on Energy Metabolism of Yunnan Semi-Fine Wool Sheep During Lactation[J]. China Animal Husbandry and Veterinary Medicine, 2020, 47(2): 416-424.

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A Effects of Different Dietary Calcium Levels on Energy Metabolism of Yunnan Semi-Fine Wool Sheep During Lactation

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