RUMINANT AND HERBIVORE NUTRITION AND FEED

Effects of Dietary Neutral Detergent Fiber/Non-Fibrous Carbohydrate on Lactating Performance and Apparent Digestibility of Nutrients of Lactating Donkeys

  • LIANG Xiaoshuai ,
  • YUE Yuanxi ,
  • HUI Fang ,
  • ZHANG Jing ,
  • TONG Manman ,
  • LI Li ,
  • GUO Xiaoyu ,
  • ZHAO Yanli ,
  • GUO Yongmei ,
  • SHI Binlin ,
  • YAN Sumei
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  • College of Animal Sciences, Inner Mongolia Agricultural University, Inner Mongolia Key Laboratory of Animal Nutrition and Feed Science, Hohhot 010018, China

Received date: 2021-03-09

  Online published: 2021-09-18

Abstract

This experiment was conducted to study the effects of dietary neutral detergent fiber/non-fibrous carbohydrate (NFC/NDF)on lactating performance, body weight loss and nutrient apparent digestion of lactation donkeys, and to provide a theoretical basis for rational diet formulation and milk composition optimization of female donkeys during lactation. Sixteen Dezhou donkeys with similar age of (6.73±1.16) years of age, body weight of (250.84±27.21) kg, parity of (3.25±1.12) parity and days in milk of (40±4) d were divided into CON group (concentrate to forage ratio was 30:70, NDF/NFC was 1.65) and TRM group (concentrate to forage ratio was 40:60, NDF/NFC was 1.48) with 8 donkeys in each group. The experiment lasted for 8 weeks. The results showed that the milking yield, estimated milk yield, milk production efficiency, milk protein production efficiency, milk protein production, non-fat solid production and total solid production in CON group were significantly higher than those in TRM group (P<0.05). The apparent digestibility of dry matter (DM) and gross energy (GE), the apparent digestibility of acid detergent fiber (ADF) at week 4 and the apparent digestibility of NDF and calcium (Ca) at week 8 were significantly higher than those in TRM group (P<0.05). There were no significant differences between the two groups in dry matter intake (DMI), body weight loss ratio of donkeys during lactation and contents of routine milk components (P>0.05). In conclusion, under the same dietary energy and protein conditions, increasing the dietary concentrate to forage ratio from 30:70 to 40:60, decreasing the NDF/NFC from 1.65 to 1.48, is not conducive to the development of lactating performance and nutrient digestion of lactating donkeys. Appropriate increases in concentrate to forage ratio in diet can increase the nutrient digestion and lactating performance of lactating donkeys, improve the milk quality of lactating donkeys.

Cite this article

LIANG Xiaoshuai , YUE Yuanxi , HUI Fang , ZHANG Jing , TONG Manman , LI Li , GUO Xiaoyu , ZHAO Yanli , GUO Yongmei , SHI Binlin , YAN Sumei . Effects of Dietary Neutral Detergent Fiber/Non-Fibrous Carbohydrate on Lactating Performance and Apparent Digestibility of Nutrients of Lactating Donkeys[J]. Chinese Journal of Animal Nutrition, 2021 , 33(9) : 5174 -5181 . DOI: 10.3969/j.issn.1006-267x.2021.09.037

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