Basic results of research into physiology of productive animals in the North
The results of long-termed investigations on ecological physiology of animals in the North are generalized. Problems concerning nutritional effects on the processes involved in the acid-base homeostasis in the organism of domestic and wild ruminants are discussed. The peculiarities of rumen-liver nitrogen and storage tissue proteins cycling are evaluated taking into account their dependence upon the level of nutrition. The main aspects of estrus cycles resumption and stimulation of normal estrus cycles in postpartum cows are identified