China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (4): 1334-1342.doi: 10.16431/j.cnki.1671-7236.2021.04.020

• Genetics and Breeding • Previous Articles     Next Articles

Preliminary Study on Lactation Regularity of Hetian Multiparous Red Sheep

HE Zonglong1, HOU Chenxi1, HONG Wenjuan1, YAO Lidan1, Yiming·Sulaiman1, BAI Yongsheng2, Jueken·Aniwashi1   

  1. 1. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China;
    2. Xinjiang Xiyu Muyangren Agriculture and Animal Husbandry Technology Co., Ltd., Hetian 848000, China
  • Received:2020-08-24 Online:2021-04-20 Published:2021-04-16

Abstract: The purpose of this study was to investigate the lactation law of Hetian multiparous Red sheep and improve the survival rate of double lambs.In this experiment,6 ewes of Hetian multiparous Red sheep with double lambs were selected as the objects to study the changes of milk yield and milk composition from 1 to 28 days after parturition,and analyze the correlation between breast body size index and milk yield on the first postpartum day.The results showed that the total milk yield of Hetian multiparous Red sheep was 29.87 kg from 1 to 28 days after parturition,and the average daily milk yield was 1.07 kg,the milk production increased fastest at 1-3 d,and reached the peak value of 1.23 kg on the 21st day.The lactation curve equation was y=537t0.477e-0.033t.The milk fat,non-fat milk solids,density,lactose,solids,protein indexes of Hetian multiparous Red sheep decreased rapidly at 1-3 d after parturition,and tended to be stable at 7-28 d,and there were significant differences between the 1st day and the 7th,14th,21st and 28th days of the six indicators (P<0.01).The lactation correlation between the 1st day and 14th,21st and 28th days was not significant of Hetian multiparous red sheep ewes after delivery (P>0.05),and the lactation correlation between the 2nd day and 28th day was not significant (P>0.05),others were significantly correlated(P<0.05).There was a significant correlation between lactation and breast width on the 1st,2nd,3rd and 7th days of parturition (P<0.05),and there was no significant correlation between lactation and breast body size on the 14th,21st and 28th days of parturition (P>0.05).The above results provided a theoretical basis for the germplasm characteristics,breeding,feed preparation and early weaning of Hetian multiparous red sheep.

Key words: Hetian multiparous Red sheep; milk yield; lactation curve; milk composition; breast size

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