Mehrdad Shahizad; hamid Amanlou; Najme Eslamian Farsuni; Tahere Amirabadi Farahani; Hadi Khabazan
Volume 22, Issue 3 , September 2020, , Pages 349-356
Abstract
The objective of present study was to investigate the effect of different levels of sesame meal in early lactation cow's ration on dry matter intake, milkyield and composition, apparent digestibility of nutrients and blood metabolites. Six dairy lactating Holstein cows with average DIM 26± 3 (n=3primiparous ...
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The objective of present study was to investigate the effect of different levels of sesame meal in early lactation cow's ration on dry matter intake, milkyield and composition, apparent digestibility of nutrients and blood metabolites. Six dairy lactating Holstein cows with average DIM 26± 3 (n=3primiparous and n=3 multiparous cows) were randomly assigned to 1 of 3 experimental treatments (different levels of sesame meal) in repeated 3×3Latin square design. Experimental treatments were control (without sesame meal), 4.33% sesame meal and 8.66% sesame meal (DM basis). Theexperimental periods consisted of 21 d with the first 14 days as adaptation and the last 7 days as sampling days. Increasing level of sesame meal inearly lactation rations did not affect dry matter intake, milk yield and composition (fat, protein and lactose), feed utilization efficiency, apparentdigestibility of nutrients and blood metabolites (P 0.05), while milk urea nitrogen decreased with increasing the level of sesame meal (p < 0.05).Blood urea nitrogen concentrations also tended (P = 0.1) to decrease with increasing levels of sesame oil. In general, the lack of response in feedintake and milk yield with increasing the levels of sesame meal in early lactation cow's ration showed that sesame meal could be a proper proteinsource in early lactation cow's ration.