Feed additive for improving nitrogen utilization rate of dairy cow and preparation method thereof

Abstract

The invention provides a feed additive for improving the nitrogen utilization rate of dairy cows, and belongs to the technical field of feed additives. The additive comprises the following components in parts by mass: 10-15 parts of NCG, 15-20 parts of zinc aspartate, 5-10 parts of cowherb seeds and 5-8 parts of a yeast solid fermentation product. The additive improves decomposition and utilization of protein by microorganisms in the rumen of the dairy cow by adjusting the steady state of the microorganisms in the rumen of the dairy cow, promotes synthesis of milk protein of the dairy cow, and improves the nitrogen utilization rate of the dairy cow.

Description

technical field [0001] The invention belongs to the technical field of feed additives, and in particular relates to a feed additive for improving the nitrogen utilization rate of dairy cows and a preparation method thereof. Background technique [0002] Nitrogen utilization efficiency of dairy cows is the efficiency with which cows convert nitrogen into protein, including protein in milk, protein stored and metabolized by the cow itself, etc. [0003] Improving the nitrogen use efficiency of dairy cows directly affects the economic benefits of the farm. There are many factors that affect the nitrogen use efficiency of dairy cows, such as biological genetic factors of dairy cows, lactation stage, nutritional factors, environmental factors and so on. Among them, nutritional factors are one of the important factors affecting nitrogen utilization in lactating dairy cows. [0004] (1) Concentrate-to-coarse ratio of diet Most modern large-scale cattle farms adopt the feeding mod...

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Problems solved by technology

[0005] (2) Suitable environmental conditions Under normal breeding conditions, dairy cows have a certain degree of adaptability to a suitable environment, and dairy cows are more sensitive to changes in the breeding environment, especially for high-yielding dairy cows. , immune function, etc. are all affected by environmental factors. The instability of the environment will affect the feed intake and milk production of dairy cows, which will affect the blood nitrogen and urea nitrogen levels of dairy cows, and then affect the nitrogen utilization of dairy cows

[0010] The existing technology is mainly to improve the nitrogen utilization rate of dairy cows by improving the composition of the diet (such as the ratio of concentrated forage, protein content), etc., but this method is relatively complicated, especially the feasibility of changing the diet formula of TMR in large-scale farming Not high. Secondly, due to the wide distribution of dairy cattle breeding in my country, the source of feed is greatly affected by seasonality and region, and it is not easy to be widely promoted.

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