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Prediction of 305 day milk yield using part lactation records in friesian cattle in Egypt [electronic resource].

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Ghoneim, Elham M

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Language: English Summary language: Arabic Description: p.481-489Other title:

التنبؤ بإنتاج اللبن فى 305 يوم باستخدام سجلات اللبن الجزيئية لماشية الفريزيان فى مصر [Added title page title]

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Minufiya journal of agricultural research, 2014 V. 39 (2) Part 1 [electronic resource].

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In: Minufiya Journal of Agricultural Research 2014.v.39(2)P1Summary: Data were collected from the records of Friesian herd during the period from year 1997 to 2008 year. Herd were raised in Experimental and Research Unit of Toukh Tanbisha, Faculty of Agriculture, Minufiya University which include 1948 normal first lactation records. The aim of the present study was to predict 305 dMY using single and cumulative month records in Friesian cows in Egypt. Means of milk yield in :305 day, third month, fifth month and sixth month were 3633.66 ± 1672.47 kg, 520.77 ± 221.21 kg, 399.84 ± 223.94 kg and 402.33 ± 205.64 kg respectively, where means of cumulative milk yield in :90 day, 150 day and 180 day were 1475.49 ± 527.49 kg, 2337.08 ± 860.78 and 2931.45 ± 963.42 kg, respectively. The study illustrated that mixed model which included milk yield in third month, Fifth month and sixth month (305 dMY= 384.417 + 2.083M3 + 2.264 M5 + 3.406 M6) had the best coefficient of determination ( R2 =.819) to predict 305 dmy from single month records. Key words: Prediction, 305-dMY, part lactation, cumulative yields, friesian cattle.

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Data were collected from the records of Friesian herd during the period from year 1997 to 2008 year. Herd were raised in Experimental and Research Unit of Toukh Tanbisha, Faculty of Agriculture, Minufiya University which include 1948 normal first lactation records. The aim of the present study was to predict 305 dMY using single and cumulative month records in Friesian cows in Egypt. Means of milk yield in :305 day, third month, fifth month and sixth month were 3633.66 ± 1672.47 kg, 520.77 ± 221.21 kg, 399.84 ± 223.94 kg and 402.33 ± 205.64 kg respectively, where means of cumulative milk yield in :90 day, 150 day and 180 day were 1475.49 ± 527.49 kg, 2337.08 ± 860.78 and 2931.45 ± 963.42 kg, respectively. The study illustrated that mixed model which included milk yield in third month, Fifth month and sixth month (305 dMY= 384.417 + 2.083M3 + 2.264 M5 + 3.406 M6) had the best coefficient of determination ( R2 =.819) to predict 305 dmy from single month records. Key words: Prediction, 305-dMY, part lactation, cumulative yields, friesian cattle.

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