China Animal Husbandry and Veterinary Medicine ›› 2019, Vol. 46 ›› Issue (9): 2618-2624.doi: 10.16431/j.cnki.1671-7236.2019.09.015

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Research Progress on the Effects of Dietary Protein and Neutral Detergent Fiber Levels on Growth and Development of Young Ruminants

ZHANG Yu1,2, SHI Liguang2, XUN Wenjuan2, LIU Qiang1   

  1. 1. College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China;
    2. Institute of Tropical Crop Resources, Chinese Academy of Tropical Agriculture, Haikou 571101, China
  • Received:2019-03-01 Online:2019-09-20 Published:2019-09-21

Abstract: The early stage is a very important stage in the life of ruminants.The nutrition supply,growth and development status of the ruminant during this period determine the production performance and reproductive efficiency in adulthood.Due to its immature digestive and metabolic system and extremely strong plasticity in the young stage,the dietary nutrition levels of ruminants,especially the protein and neutral detergent fiber (NDF) levels,play a very important role in the development process of ruminants.In production practice,inadequate or excessive nutrition supply will affect the growth and health of young animals,and even accompany them throughout their life.The dietary protein and fiber levels of young ruminants play a decisive role in the regulation of growth performance and gastrointestinal development.An appropriate increase in dietary protein level can improve the growth and development of young ruminants,and improve nutrient digestibility and rumen development due to the increase in available nitrogen concentration of rumen microorganisms in the feed.Under the condition of ensuring sufficient concentrate feed,increasing the dietary fiber level can improve the feed intake and growth performance of young ruminants,and promote rumen development,as well as improve the digestibility of nutrients.However,due to the different sources of experimental animals or raw materials,there are still different experimental results in related experiments.Therefore,the authors focus on the effects of different levels of dietary protein and NDF on the growth and development,nutrient digestibility and rumen development in young ruminant,and the reasons for different experimental results,in order to provide theoretical basis for solving the problem on the breeding management of young ruminant animal,and improving their feeding efficiency.

Key words: young ruminant; protein; neutral detergent fiber (NDF); growth performance; gastrointestinal tract

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