Low dietary intake altered the serum biochemical profile of cross breed heifers eliciting irregular estrous cycle

In Bangladesh, under feeding or over feeding is one of the major concerns to overcome the reproductive difficulties(anestrus) of cattle. The information on standard feeding using available local feed ingredients could be helpful to overcome the problem.Thestudy was conductedto determine the influence of dietaryintake on serum biochemical profile which prompts the estrous induction of cross breed heifers. A total of 12 of cross bred heifers were randomly selected bearing same age and body weight which weredivided into three uniform groups namelyT0 (Control or standard feeding), T1 (40% restricted or less feeding) and T2 (60% restricted feeding)were fed green grasses, concentrate and adlibitum water after frequentdeworming. The blood samples were collected aseptically from jugular veins every 15 days intervals of post treatment. The blood sera were used to analyze the biochemical profile using available commercial kits with standard methods. The animals of T1 and T2groupswerefoundsignificantly (p<0.01and/or p<0.05)lowglucose, total protein, calcium and iron values. On the other hand,sera phosphorus, manganese and cobalt level were found significantly (p<0.05) decrease in the animals of T2. In addition, no significant changes were found in serum zinc and copper values. Theheifersof T0exhibited regular estrous whereasthe heifers of T1 and T2 showedirregular estrus signs followed by anestrus. In thisstudy, it is revealed that standard feeding is very important tomaintaintheblood biochemical profile and estrus induction in heifers.