Characteristics and Feeding Points of Adult Dairy Cows in Different Lactation Stages

Summer is the concentrated season of milk production by dairy cows. In order to increase the milk production of dairy cows, improve milk quality, and increase reproduction rate, it is necessary to understand the physiological changes and feeding management methods of dairy cows during different lactation periods.

First, the physiological changes in dairy lactation (prosperous period) feeding points

Pre-lactation (1-3 days after childbirth), at this time the physiological changes of dairy cows are large. After 1-2 days of postpartum calf, the calf was exhausted, and her appetite was gradually prosperous, but her digestive power was very weak and her breasts were edema. In order to ensure the normal occurrence of lactation peaks after the production of dairy cows and to increase the milk production during the lactation period, higher energy and protein feeds are used during this period. For high-quality forage grasses, some rice soups are added for milking. When you are milking for the first time, don't squeeze it all off. The milk that you squeezed out was enough to feed the calf. Otherwise, due to a significant decrease in the intra-mammary pressure, the exudate of the micro-vessel wall may be accelerated and the breast may be severely edema. High-yield dairy cows can cause embarrassment. Therefore, to achieve normal milking within 2-5 days. 15-20 days after childbirth, breast edema disappears and it enters into a period of milk production.

Second, the mid-lactation physiological changes and feed points

The fourth month of dairy cows' milk production and gradual reduction of metabolic function gradually reduced milk production. At this time, the fetus grows slowly. Adding roughage and juicy feed to the diet will benefit cattle's digestive function, slow milk production, and promote normal fetal development.

Third, feeding the late lactation

Dairy cows produce milk for seven months, at which time the fetus develops very fast, with an average daily gain of more than 360 grams and a significant decrease in milk production. In order to ensure the normal development of the fetus and stabilize milk production, sufficient quantities of protein and minerals should be guaranteed in the diet.

IV. The physiological characteristics of dry milk

Milk production stops and the body is in recovery. After a milking period, the cow’s tissues, organs, and physique are greatly damaged. To ensure normal lactation during the next lactation period, let the body rest and recover. Prolong or shorten the dry period properly according to the circumstance such as cattle. The good dry season with a good lyrical moisture is 1.5 months and the dry period with poor lye is more than 2 months. After the suspension of production, appropriate supplements and nutrients should be added.

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