Comparison of various recording plans to predict milk yield in Sahiwal cows
1997
Khan, M.S. (University of Agriculture, Faisalabad (Pakistan). Dept. of Animal Breeding and Genetics) | Bhatti, S.A. | Manzoor, A. | Chaudhary, H.Z. | Iqbal, J.
Complete lactation records (n = 1039) of Sahiwal cows were utilized to compare various test plants for predicting lactation yield from partial records. Recording morning and evening milking at a monthly interval was used as a standard (AM - PM plan) for comparison. Cows on the average produced 8.6% more milk in the morning as compared to evening milking. Based on correlation between actual and predicted yield, AM plan were generally better than PM plan while correlations for alternate AM-PM plan were also comparable. Standard deviations of biases (difference between actual and predicted milk yield) were lowest or standard AM-PM plan while standard highest values were observed for the PM plan. Lactation milk yield could be fairly accurately predicted from alternate AM-PM plan as well as PM plan for use under the field conditions.
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Эту запись предоставил National Agricultural Research Centre
