Suresh Kumar, PSuresh Kumar, KPasupathy, Karu, et al.,TANUVAS2022-06-242022-06-242022-03https://krishikosh.egranth.ac.in/handle/1/5810184739TNV_AJDFR_2022_41(1)106-110Background: Majority of the sheep farmers in our country (semi arid region) do not supplement with concentrate feed even in critical physiological stages. It was observed that concentrate supplementation in addition to free grazing substantially improved production performance of ewes and lambs. Methods: In this study the parameters such as conception rate, birth weight of lambs, fortnightly body weight changes, rumen fermentation pattern and blood parameters were recorded. Result: Out of twenty sheep in each group 16, 18 and 19 were exhibited oestrous symptoms and the percentage of heat observed were 80, 90 and 95 in the G1, G2 and G3, respectively. The numbers of animals conceived were 12, 14 and 17 and the conception percentage was 75, 77 and 89. The concentrate supplemented group showed higher conception rate. The numbers of lambs born were 12, 14 and 17 and the lambing percentages were 75, 78 and 89 for the G1, G2 and G3, respectively. The rumen pH was found to be decreasing in G3 group followed by G2 group when compared to G1 group whereas, the production of VFA was found to be higher in G3 group followed by G2 group when compared to G1 group. There were increased levels of total nitrogen, TCA nitrogen and NP nitrogen in sheep at 4 hours after feeding of concentrate feed in G3 group followed by G2 group when compared to G1 group. The results indicated that the higher levels of blood glucose, triglycerides, cholesterol and BUN were observed in G3 group followed by G2 group when compared to G1 group.EnglishVeterinary ScienceArticle