The hot summer is coming. How can cows spend the summer safely

The balance of nutrients is a matter of proportion, while the demand is a matter of degree. Only by organically combining the two can we meet the nutritional needs of dairy cows. The formulation of dairy cow diet formula should take the nutritional needs of dairy cows as the core, fully grasp the basic situation of cattle, make scientific and rational use of local feed resources, formulate and optimize dairy cow diet formula, meet the nutritional needs of dairy cows and give full play to the production potential of dairy cows.

1、 Analysis of nutritional composition of feed raw materials

The nutrient content of feed resources in different regions varies greatly due to their different climate, geological structure, water resources, soil types and crop varieties. Therefore, before formulating the formula of dairy cows' whole mixed diet, the laboratory analysis of feed raw materials can not only evaluate the quality and feeding value of feed raw materials, but also be very important for accurately calculating the feed formula that meets the needs of dairy cows and has low cost Z.

2、 Selection of feeding standards

The feeding standard is formulated under certain conditions. The quantity of various nutrients stipulated by it is put forward according to the average data of many experimental research results, which can not fully meet the needs of each group. With the development of animal and feeding science, the improvement of livestock and poultry varieties and the improvement of production performance, the indicators specified in the feeding standards are also constantly revised, enriched and improved.

3、 Ration matching steps

1. According to the basic situation of the herd, mainly including weight, parity, physiological stage, production performance, breeding, etc., the herd is divided according to the milk yield and physiological production stage to determine the nutritional requirements and dietary nutritional level of each herd;

2. Determine the feed intake of dairy cows or estimate the dry matter intake according to the average weight of dairy cows and the physiological stage of production; 3. Analyze or consult the nutritional composition of dairy cows' dietary raw materials, compare the nutritional composition and actual feeding value of feed raw materials, and select and determine the type and appropriate dosage of feed raw materials;

4. By comparing the nutritional requirements of dairy cows and the supply of dietary nutrients, combined with the current price of feed raw materials, adjust and optimize the formula to balance the nutritional components of the diet and minimize the cost.

4、 Dietary nutrition level

The balance of nutrients is not a fixed value, but an appropriate range. While the relative balance of nutrients is achieved through dietary regulation, the self nutritional regulation function of dairy cows also plays a role that can not be ignored. Therefore, there is no absolute nutritional balance in dairy cow diet, but a dynamic and relative nutritional balance.

5、 Ration supply mode

Fine and coarse materials are supplied separately. Generally, the principle of rough first and then fine is adopted. It should be noted that different feeding sequences have different effects on the fermentation of concentrate in rumen. "Coarse first and then fine" can make the starch fermentation in the middle of the concentrate fast and the protein degradation slow; The "fine first and then coarse" is the opposite. The use of "refined before coarse" requires that the palatability of forage must be good.