BISHIST, ROHITKAMAL KISHORE2021-12-272021-12-272021-12https://krishikosh.egranth.ac.in/handle/1/5810179898ABSTRACT The present investigation entitled “ABSTRACT The present investigation entitled “Nutritional evaluation of Grewia optiva and Bauhinia variegata and effect of their feeding on milking performance of crossbred cows” was conducted in dairy farm and laboratory of the Department of Silviculture and Agroforestry, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.) during the period of October 2020 to January 2021 with the objectives viz. to study the nutritional composition of Grewia optiva and Bauhinia variegata in different months and to study the effect of feeding G. optiva and B. variegata on milk performance of crossbred cows.In order to evaluate the monthly variation in nutritive content of G. optiva and B. variegata the leaf samples were collected in October, November, December and January month. In the second experiment to evaluate the effect of feeding of G. optiva and B. variegata on milk performance of crossbred cows a feeding trial was conducted for a period of 90 days (15th October to 15th January). The findings of the investigation revealed that the nutritional composition of G. optiva and B. variegata leaves varied markedly among four months of leaves collection. The overall mean of nutritional composition of G. optiva and B. variegata leaves were: DM (42.14 and 43.15 %), CP (18.67 and 14.19%), EE (1.53 and 2.99%), CF (19.66 and 24.68%), NDF (31.59 and 34.81%), ADF (23.90 and 26.98%), TA (6.41 and 6.31%), AIA (1.25 and 1.33%), NFE (53.74 and 51.82%), Ca (2.25 and 2.10 %) and P (0.40 and 0.47%). The DM, EE, CF, NDF, ADF, TA, AIA and Ca contents of both species increased with maturity; whereas, CP, NFE and P contents decreased. CP, TA, NFE and Ca content were significantly higher in G. optiva leaves and rest parameters were significantly higher in B. variegata leaves. Feeding of G. Optiva leaves to lactating cows resulted in 3.09 per cent higher milk yield and better milk composition (protein%, SNF%, TS%, acidity% and specific gravity) as compared to B. variegata fed group. The overall mean of daily milk yield (kgd-1) in G1 (7.67 kgd-1) was significantly higher than that of G2 (7.44 kgd-1) respectively. Average milk protein%, SNF%, TS%, acidity% and specific gravity was significantly higher in G1 (3.59%, 8.58%, 12.70%, 0.1371% and 1.0293) as compared to G2 (3.48%, 8.53%, 12.68%, 0.1361% and 1.0280). Milk fat per centage was significantly higher in G2 (4.16%) as compared to G1 (4.12%). The study concluded that the nutritional composition of G. optiva and B. variegata leaves were significantly among the four months of the study. Feeding trial of the study revealed that the G. optiva fodder was a better fodder for animal feeding as compared to B. variegata fodder. effect of their feeding on milking performance of crossbred cows” was conducted in dairy farm and laboratory of the Department of Silviculture and Agroforestry, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.) during the period of October 2020 to January 2021 with the objectives viz. to study the nutritional composition of Grewia optiva and Bauhinia variegata in different months and to study the effect of feeding G. optiva and B. variegata on milk performance of crossbred cows.In order to evaluate the monthly variation in nutritive content of G. optiva and B. variegata the leaf samples were collected in October, November, December and January month. In the second experiment to evaluate the effect of feeding of G. optiva and B. variegata on milk performance of crossbred cows a feeding trial was conducted for a period of 90 days (15th October to 15th January). The findings of the investigation revealed that the nutritional composition of G. optiva and B. variegata leaves varied markedly among four months of leaves collection. The overall mean of nutritional composition of G. optiva and B. variegata leaves were: DM (42.14 and 43.15 %), CP (18.67 and 14.19%), EE (1.53 and 2.99%), CF (19.66 and 24.68%), NDF (31.59 and 34.81%), ADF (23.90 and 26.98%), TA (6.41 and 6.31%), AIA (1.25 and 1.33%), NFE (53.74 and 51.82%), Ca (2.25 and 2.10 %) and P (0.40 and 0.47%). The DM, EE, CF, NDF, ADF, TA, AIA and Ca contents of both species increased with maturity; whereas, CP, NFE and P contents decreased. CP, TA, NFE and Ca content were significantly higher in G. optiva leaves and rest parameters were significantly higher in B. variegata leaves. Feeding of G. Optiva leaves to lactating cows resulted in 3.09 per cent higher milk yield and better milk composition (protein%, SNF%, TS%, acidity% and specific gravity) as compared to B. variegata fed group. The overall mean of daily milk yield (kgd-1) in G1 (7.67 kgd-1) was significantly higher than that of G2 (7.44 kgd-1) respectively. Average milk protein%, SNF%, TS%, acidity% and specific gravity was significantly higher in G1 (3.59%, 8.58%, 12.70%, 0.1371% and 1.0293) as compared to G2 (3.48%, 8.53%, 12.68%, 0.1361% and 1.0280). Milk fat per centage was significantly higher in G2 (4.16%) as compared to G1 (4.12%). The study concluded that the nutritional composition of G. optiva and B. variegata leaves were significantly among the four months of the study. Feeding trial of the study revealed that the G. optiva fodder was a better fodder for animal feeding as compared to B. variegata fodder.EnglishThesis