Mainly consider the following aspects:
First, according to different genders, different biological periods of nutritional requirements or feeding standards, according to the provisions of the nutritional supply of the preparation. However, it is also necessary to consider appropriate changes in the deer's body condition, health status, etc., and adjust the actual feeding effect.
Second, according to the nutrient composition of the feed, the nutritional characteristics of the feed and the deer's diet and digestive physiological characteristics, a reasonable choice of feed. Pay attention to the quality of feed ingredients and the differences in nutrients contained.
Third, choose a good palatability, high digestibility feed for preparation. Because palatability is good or bad, it directly affects the deer's feed intake. For poorly palatable feed, limit its use.
Fourth, in the preparation of diets, feed raw materials should be diversified, as far as possible according to the local feed resources and existing feed types, fully consider the nutritional characteristics of each raw material, palatability and price factors such as a reasonable mix. Play a complementary role of various nutrients.
Fifth, pay attention to the physical and chemical characteristics of various feeds to avoid the destruction of nutrients. No mildew, spoilage, and toxic feed. Sixth, we must understand the local soil composition, especially the serious lack of elements in the soil on the impact of feed ingredients, such as corn in Northeast China is often insufficient selenium content.
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