RUMINANT AND HERBIVORE NUTRITION AND FEED

Effects of Different Ratios of Whole-Plant Corn Silage in Roughage on Growth Performance, Nutrient Apparent Digestion, Meat Quality and Blood Physiological Indexes of Hu Sheep

  • ZHANG Zhian ,
  • ZHOU Wenjing ,
  • PAN Faming ,
  • LI Fei ,
  • LI Fadi ,
  • WENG Xiuxiu
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  • 1. State Key Laboratory of Grassland Agro-Ecosystem, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China;
    2. Institute of Animal and Pasture Science and Green, Agriculture of Gansu Academy of Agricultural Science, Lanzhou 730070, China

Received date: 2021-03-03

  Online published: 2021-09-18

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Abstract

This study was aimed to explore the effects of different ratios of whole-plant corn silage in roughage on growth performance, nutrient apparent digestion, meat quality and blood physiological indexes of Hu sheep. In the experiment, seventy-two male Hu lambs of similar body weight were selected and raised in single pens. According to the different ratios of whole-plant corn silage in roughage, the sheep were randomly divided into 100% whole-plant corn stalk group (CS group), 33% corn silage group (33MS group), 66% whole-plant corn silage group (66MS group), 100% whole corn silage group (100MS group). The whole experiment lasted for 70 days, including a 7-day adaptation period and a 63-day trial period. The results showed as follows:1) the different ratios of whole-plant corn silage had no significant effect on the growth performance of Hu sheep (P>0.05); 2) the valeric acid molar ratio in the 66MS and 100MS groups was significantly higher than that in the CS group (P<0.05); 3) the neutral detergent fiber (NDF) apparent digestibility and acid detergent fiber (ADF) apparent digestibility of Hu sheep in the 100MS group were significantly higher than those in other groups (P<0.05), and the crude protein (CP) apparent digestibility of Hu sheep in the 33MS group was significantly higher than that in the 66MS group (P<0.05), the value was also higher than the other groups; 4) the drip loss of the meat in the 33MS group was the lowest compared with the other groups, indicating that the meat of the sheep in 33MS group had the best water retention performance and improved the meat quality; 5) the hematocrit (HCT) of Hu sheep in the 100MS group was significantly higher than that in the CS group and 33MS group (P<0.05), but the corpuscular-hemoglobin concentration (MCHC) was significantly lower than that in the CS group and 33MS group (P<0.05). In summary, considering the comprehensive production efficiency and production cost, the optimal ratio of whole-plant corn silage under the experimental conditions is 33%.

Cite this article

ZHANG Zhian , ZHOU Wenjing , PAN Faming , LI Fei , LI Fadi , WENG Xiuxiu . Effects of Different Ratios of Whole-Plant Corn Silage in Roughage on Growth Performance, Nutrient Apparent Digestion, Meat Quality and Blood Physiological Indexes of Hu Sheep[J]. Chinese Journal of Animal Nutrition, 2021 , 33(9) : 4998 -5006 . DOI: 10.3969/j.issn.1006-267x.2021.09.020

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