Effect of mineral supplementation on recurrence of estrus and conception in anoestrus buffalo heifers during summer.

摘要

In the extreme summer (June) 26 true anoestrus buffalo heifers including two dry buffaloes aged 28 to 66 months and weighing 256 to 628 kg were divided into two groups. Eighteen heifers were supplemented for 20 days with 2 boluses of a mineral supplement, each having composition as: iron 200 mg, iodine 20 mg, cobalt 80 mg, manganese 80 mg, copper 100 mg, zinc 40 mg, selenium 0.5 mg and asparagus racemorus 50 mg. Eight animals including 2 dry ones were kept as control. The treatment improved reproductive efficiency. Eight heifer in the treatment group (44%) exhibited oestrus within 60 days of supplementation and 4 (22%) conceived. In the control group, only 1 (12.5%) exhibited oestrus and none conceived in the same period. It can be concluded that mineral supplementation alleviated summer anoestrus in buffalo heifers..