Document Type : Research Paper

Authors

1 Expert, Animal Scienes, and Director, Faka Agro-Animal husbandary Corporation

2 Senior Expert faka Agro-Animal Husbandary Corporation

3 Postgradute Student, Isfahan Industrial University, Isfahan

4 Expert faka Agro-Animal Husbandary Corporation

5 Senior Expert, faka Agro-Animal Husbandary Corporation

Abstract

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 2
treatments (concentrate containing 7 percent of extruded linseed vs. control), (150 cows per
treatment). 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 fed
Totally Mixed Rotion (TMR) with no extruded linseed (control), while those in group 2 fed TMR
containing extruded linseed (7 percent of concentrate). Extruded linseed did not affect milk production
and dry matter intake (P>0.05). Cows treated with extruded linseed had higher pregnancy rates, fewer
number of open days and number of inseminations (P<0.05). It was finally concluded that extruded
linseed in ration can increase reproduction performance of Holstein dairy cows in their early lactation.

Keywords