effect of extruded linseed diet on production and reproduction performance of holstein cows

the present study was conducted to evaluate the effects of extruded linseed on milk production,dry matter intake and reproduction performance of 300 holstein lactating cows (35±15 days in milk;41±9/8 kg/day of milk production). cows were placed in a completely randomized design of 2treatments (concentrate containing 7 percent of extruded linseed vs. control), (150 cows pertreatment). cows were fed a balanced total mixed ration (610 g concentrate /kg dm and 390 g forages/kg dm) 3 times per day and while being milked 3 times per day too. cows in group 1 were fedtotally mixed rotion (tmr) with no extruded linseed (control), while those in group 2 fed tmrcontaining extruded linseed (7 percent of concentrate). extruded linseed did not affect milk productionand dry matter intake (p>0.05). cows treated with extruded linseed had higher pregnancy rates, fewernumber of open days and number of inseminations (p