Ravindra Reddy, YSuresh Babu, DSuryanarayana, M V A NPraveen Kumar Reddy, K2017-06-102017-06-102013-05http://krishikosh.egranth.ac.in/handle/1/5810019304THESESABSTRACT : Complete ration in mash form (R II) was formulated using groundnut haulms as locally available roughage source and concentrate ingredients with ratio of 50:50 and was compared with conventional ration (R I) containing paddy straw, green jowar fodder and concentrate mixture to study the productive performance in the lactating Sahiwal cows and growth rates in the Sahiwal calves. The proximate composition of the rations i.e. DM, OM, CP, CF, EE, NFE and Total ash content of the conventional ration (R I) and complete ration (R II) were 92.25, 91.68, 17.65, 9.46, 5.25, 59.32, 8.32 and 90.00, 92.58, 15.50, 22.82, 1.58, 52.68, 7.42 respectively. The chemical composition of the experimental roughages i.e. DM, CP, CF, EE, NFE and TA contents of groundnut haulms, green jowar, paddy straw were 88.25, 14.20, 29.15, 1.32, 38.45 and 16.88; 24.52, 7.28, 28.26, 1.58, 55.21 and 7.91; 94.15, 4.62, 35.39, 1.14, 38.53 and 20.32 respectively. Twelve Sahiwal cows in their early stage of lactation and weighing about 287.83±0.17 kg were choosen in a randomized block design considering the lactation number, stage of lactation and average daily milk yield. The average percent dry matter intake by Sahiwal cows was comparable among the rations R I (2.55 ± 0.02 kg) and R II (2.61 ± 0.01 kg). The daily average milk yield, milk fat and SNF percentages were 6.23 ± 0.52, 5.20 ± 0.22, 8.72 ± 0.04 and 6.75 ± 0.33, 5.03 ± 0.33, 8.82 ± 0.04 on R I and R II, respectively. The average milk fat yields were 0.33 and 0.34 kg on R I and R II, respectively. The average milk protein per cent were 3.40 ± 0.04 and 3.56 ± 0.05 on rations R I and R II. There was significant difference in milk protein per cent yield in Sahiwal cows fed on experimental rations. The average 4 per cent fat corrected milk, DMI per kg and 4% FCM yields were 7.24 ± 0.71, 1.08 ± 0.13 and 7.82 ± 0.56, 1 ± 0.07 on R I and R II respectively. No significant difference was observed in 4 per cent fat corrected milk (4%FCM) yield and DMI per kg 4% FCM yield in lactating Sahiwal cows fed experimental rations. The cost of feed per kg milk yield and cost of feed per kg 4 % FCM yields were 13.33 ± 1.35, 11.62 ± 1.34 and 12.78 ± 0.75, 11.24 ± 1.03 fed on R I and R II, respectively. Statistical data revealed there is no significant difference among conventional and complete ration. In the growth experiment 12 Sahiwal calves of 3 to 4 months of age were divided into two groups at random and were feed with conventional diet and complete diet for 90 days Significantly (P<0.05) higher live weight gain was observed in Sahiwal calves fed on ration II (20.24 ± 0.66 kg) as compared to those fed on ration I (18.06 ± 0.38 kg). The average daily gain (ADG) was significantly (P < 0.05) higher in ration R II (224.83 ± 7.30 g) than R I (200.50 ± 4.22 g). The DMI per kg weight gain was at par between ration R II (8.73 ± 0.51 kg) and R I (9.74 ± 0.75 kg). The cost of feed per kg weight gain were 113.07 ± 8.71 and 101.87 ± 5.96 fed on R I and R II, respectively and there was no significant difference among two rations. The initial and final measurements of heart girth (cm), height of withers (cm) and body length (cm) were 58.64±4.24 and 73.36±3.66, 29.45±5.71 and 33.61±5.11, 53.59±3.91 and 72.45±3.71 respectively for conventional ration and complete rations respectively. The present study indicated that groundnut haulms can be included as a roughage source at 50% levels in the rations of lactating Sahiwal cows without affecting production performance and growth rates in Sahiwal calves.ennullThesis