Genotype influencing yield and milk composition in different dairy production systems
محل انتشار: مجله علمی علوم بیولوژیکی، دوره: 4، شماره: 1
سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 333
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شناسه ملی سند علمی:
JR_SJBS-4-1_002
تاریخ نمایه سازی: 16 آذر 1394
چکیده مقاله:
The milk yield and milk composition of dairy animals are influenced by a large number of factors. Generally, these factors are based on genetic and non-genetic differences between dairy animals. While the genetic potential of an animal is fixed at conception, non genetic factors such as nutrition, management, milking frequency, rearing methods, stage of lactation, etc. determine whether genetic potential is attained. Therefore, the maximum marketable milk yield with different fat and protein content is desirable to producers to increase farm profitability and can be affected by choice of appropriate genotype. The present discussion explores the consequences of choice of genotype in dairy production enterprises for the milk yield and composition. The discussion points to the fact that genotype affect either yield or milk composition during the entire lactation. However, across genotypes fat and protein yields are affected by both the quantity of milk produced and fat or protein percentages in the milk.
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نویسندگان
N Assan
Zimbabwe Open University, Department of Agriculture Management, Faculty of Science, Bulawayo Region, Box ۳۵۵۰, Bulawayo, Zimbabwe