›› 2018, Vol. 45 ›› Issue (9): 2455-2462.doi: 10.16431/j.cnki.1671-7236.2018.09.014

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Study on the Supplementary Effect of Straw Complete Pellet Feeds for Gansu Alpine Fine-wool Sheep in Late Pregnancy

WANG Chunhui, ZHANG Liping, ZHANG Changji   

  1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2018-04-16 Online:2018-09-20 Published:2018-09-26

Abstract:

The method of grazing+feeding with two kinds of complete pellet feed of corn straw and wheat straw was adopted to supplement the Gansu Alpine Fine-wool sheep in the late pregnancy in cold season in the study.The supplementary effect was studied by the measurement of body weight,serum biochemical parameters and rumen fluid parameters of ewes during late pregnancy,and the birth weight of lambs.60 healthy ewes in late pregnancy with similar body weight were chosen and randomly divided into 3 groups with 20 ewes per group.The nutritional requirement of groups Ⅰ and Ⅱ was determined according to the feeding standards of the Chinese Merino sheep at the late stage of gestation (deducting grazing feed intake).The ewes in groups Ⅰ and Ⅱ were supplemented with 1.19 kg/d wheat straw,corn stalk complete pellet feed,respectively.The ewes in control group were fed with traditional method of the farmers (corn 0.05 kg and oat grass 0.20 kg per ewe),and the formal test lasted for 60 d.The results showed that the average daily gain of pregnant ewes and birth weight of lambs in two treatment groups were significantly higher than that in control group (P<0.05),while there was no significant difference between two groups (P>0.05).The concentrations of total protein, albumin,glucose,total cholesterol,alanine aminotransferase, aspartate aminotransferase and lactate dehydrogenase in two treatment groups were significantly higher than that in control group (P<0.05);The mole ratio of propionic acid and the concentration of total nitrogen,protein nitrogen,volatile fatty acids in the rumen fluid of pregnant ewes in two treatment groups were significantly higher than that in control group (P<0.05),however the mole ratio of acetic acid were significantly lower than that in control group (P<0.05).It could be seen that supplementing wheat stalk or corn stalk complete pellet feed could improve the nutritional status of Gansu Alpine Fine-wool sheep in late pregnancy,and promote the growth and development of lambs.

Key words: Gansu Alpine Fine-wool sheep; supplementary feed; straw complete pellet feed; serum biochemical parameters; rumen fermentation parameters

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