Production and reproductive performance of crossbred dairy cattle at Kasetsart University farm [Thailand]
1986
Porntip Tantivong
Holstein Friesian with 75 % crosses had highest average actual milk yield, 305 day milk yield, milk yield per day and the best conception rate were 2,216.50, 2,666.82, 7.99 kg and 1.20 respectively. Brown Swiss with 50 % crosses had the highest lactation length and the lowest dry period with 377.00 and 134.91 days respectively. Holstein Friesian with 50 % crosses had highest butter fat and lowest calving interval with 4.88 % and 437.97 days respectively. Brown Swiss with 75 % crosses had the highest gestation period with 283.62 days and Brown Swiss with =87.5 % crosses had the lowest age at first calving was 31.07 months. Actual milk yield had high significant correlation with 305 day milk yield, milk yield per day, lactation length, age at calving, number of lactation and significant correlation with dry period. The 305 day milk yield had high significant correlation with milk yield per day, lactation length, dry period and number of lactation. Milk yield per day had high significant correlation with dry period, age at calving and number of lactation. Lactation length had high significant correlation with calving interval. Dry period had high significant correlation with calving interval, number of lactation and conception rate. Calving interval had high significant correlation with age at calving, conception rate and significant correlation with number of lactation. Age at calving had high significant correlation with number of lactation and significant correlation with conception rate.
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