RUMINANT AND HERBIVORE NUTRITION AND FEED

Effects of Sweet Sorghum Hay Replacement by Different Proportions of Sweet Sorghum Silage on Growth Performance, Nutrient Digestibility and Serum Biochemical Indexes of Dezhou Donkey Foals

  • WANG Fei ,
  • HE Zhenfu ,
  • CHEN Ping ,
  • HE Chungui
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  • Animal Husbandry-Pasture and Green Agriculture Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China

Received date: 2021-01-19

  Online published: 2021-08-11

Supported by

 

Abstract

The aim of this study was conducted to investigate the effects of sweet sorghum hay replacement by different proportions of sweet sorghum silage on the growth and development of Dezhou donkey foals. Thirty Dezhou donkey foals were divided into five groups with 6 donkeys per group. In the five groups, sweet sorghum silage was used to replace 0, 15%, 30%, 45% and 60% dry matter (DM) of sweet sorghum hay, respectively. After 56-day feeding, the growth performance, nutrient digestibility and serum biochemical indexes of these donkeys were measured. The results showed as follows:1) there were no significant differences in average daily gain (ADG), average daily feed intake (ADFI), feed/gain (F/G), total cost of feed and feed cost per kg gain among different groups (P>0.05); when 60% sweet sorghum hay replaced by sweet sorghum silage, the donkeys showed the lowest F/G; as well as the 15% group showed the lowest feed cost per kg gain. 2) The DM and crude protein (CP) digestibility of the control group was the highest, while the ADF and NDF digestibility was the lowest among all groups, as well as the crude fibre (CF) and ether extract (EE) digestibility was the highest in 30% and 45% groups, respectively; the EE digestibility in the 30% group was significantly lower than that in the 45% group (P<0.05). 3) For the serum biochemical indexes, the serum albumin/globulin (A/G) in the 30% group was significantly higher than that in the 45% group (P<0.05); the serum interleukin-2 (IL-2) content in the 45% group was significantly lower than that in the 15% group (P<0.05); the serum immunoglobulin G (IgG) content in the 60% group was significantly lower than that in the other groups (P<0.05), and the serum thyroxine (T4) content was significantly lower than that in the control group and 15% group (P<0.05). In conclusion, replacing the sorghum silage hay partly with sweet sorghum silage can satisfy the normal growth and development of donkey foals, and 15% is the best proportion in comprehensive consideration of feeding effect and economic benefit.

Cite this article

WANG Fei , HE Zhenfu , CHEN Ping , HE Chungui . Effects of Sweet Sorghum Hay Replacement by Different Proportions of Sweet Sorghum Silage on Growth Performance, Nutrient Digestibility and Serum Biochemical Indexes of Dezhou Donkey Foals[J]. Chinese Journal of Animal Nutrition, 2021 , 33(8) : 4560 -4568 . DOI: 10.3969/j.issn.1006-267x.2021.08.036

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