不同饲喂水平对多胎萨福克公羊生长性能、屠宰性能和器官发育的影响

doi:10.16431/j.cnki.1671-7236.2022.04.012

Abstract

Abstract: 【Objective】 The aim of this experiment was to study the effect of feeding levels of ration on growth performance,slaughter performance,viscera and other organ development of Multiparous Suffolk rams.【Method】 18 Multiparous Suffolk rams in healthy condition with similar body weight (20.00 kg±1.50 kg) were randomly divided into three groups of six rams each.Group Ⅰ was fed ad libitum,group Ⅱ was fed 60% of the feed intake in group Ⅰ,and group Ⅲ was fed 40% of the feed intake in group Ⅰ.When the average body weight of the test sheep in group Ⅰ reached 35 kg,all test sheep were slaughtered and the growth performance,slaughter performance,and the weight and development of internal organs were measured.The pre-feeding period was 7 d,and the normal test period was 50 d.【Result】 ① With the decrease of feeding level of the ration,the dry matter intake,final weight,net weight gain and average daily weight gain of the experimental sheep were significantly decreased (P<0.05).The feed-to-gain ratio of groups Ⅰ and Ⅱ were significantly lower than that of group Ⅲ (P<0.05).②The carcass weight,net carcass meat weight and fat weight of group Ⅰ were significantly higher than those of groups Ⅱ and Ⅲ,and the difference between the groups was significant (P<0.05).The net meat rate of group Ⅰ was significantly higher than those of the other two groups (P<0.05).The bone weight,meat-bone ratio and abdominal fat weight of group Ⅰ were significantly higher than those of group Ⅲ (P<0.05).The abdominal fat rate of group Ⅲ was significantly lower than those of the other two groups (P<0.05).③The rumen weight was the highest in group Ⅰ and the lowest in group Ⅲ,and the difference between the groups was significant (P<0.05).The reticulum weight and total intestinal weight were the highest in group Ⅰ,the second highest in group Ⅱ and the lowest in group Ⅲ,and the difference between the 3 groups was significant (P<0.05).④Heart,liver,lung and kidney weights were the highest in group Ⅰ,followed by group Ⅱ and the lowest in test group Ⅲ,with significant differences among the groups (P<0.05).⑤The weight of head and hoof was the highest in group Ⅰ,which was significantly higher than that in test group Ⅲ (P<0.05),and the difference with test group Ⅱ was not significant (P>0.05).The weights of skin and hair,blood were the highest in test group Ⅰ,followed by test group Ⅱ,and the lowest in test group Ⅲ,and the difference between the three groups was significant (P<0.05).【Conclusion】 Different feeding levels could affect the growth performance,slaughter performance and development of major physiological organs of Multiparous Suffolk rams to different degrees.

Key words: Multiparous Suffolk sheep; feeding level; growth performance; slaughter performance; organ development

CLC Number:

S826

NIU Yujie, ZHENG Xinxia, NIU Junli, ZHANG Wenju, CHEN Ning, LIU Yanfeng. Effects of Different Feeding Levels on Growth Performance,Slaughter Performance and Organ Development of Multiparous Suffolk Rams[J]. China Animal Husbandry and Veterinary Medicine, 2022, 49(4): 1304-1313.

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Effects of Different Feeding Levels on Growth Performance,Slaughter Performance and Organ Development of Multiparous Suffolk Rams

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