Effects of feeding diets containing heated hemp seed cake and phytase enzyme on the bone mineral of broiler chickens

Abstract

This study aimed to evaluate the effect of dietary heated hemp seed cake (HCS) with the addition of phytase enzyme on the mineral content of the tibia and femur of broiler chickens. Unsexed Ross broiler chicks (210 birds) were randomized into 7 treatments and 6 replicates and reared for 42 days. The treatments were P1= diet based on corn-soybean base; P2= diet containing 15% of HSC; P3= P2 with 1000 FTU/kg phytase enzyme; P4: diet containing 15% of autoclaved HSC; P5= P4 with 1000 FTU/kg phytase enzyme; P6= diet containing 15% of oven-heated HSC; P7= P6 with 1000 FTU/kg phytase enzyme. The results showed that the dietary HCS significantly increased (P<0.05) the calcium content of the tibia. Dietary autoclaved HSC with phytase enzyme significantly increased (P<0.05) phosphorus and potassium of the tibia compared to soybean and raw HSC-based diet. However, the treatments had no impact (P>0.05) on the magnesium, and calcium to phosphorus ratio (Ca:P) of tibia. In the femur bone, dietary autoclaved HSC with phytase enzyme significantly increased (P<0.05) calcium compared to a diet based on soybean meal, raw HSC, and oven-heated HSC without phytase enzyme.  Dietary autoclaved HSC with phytase enzyme significantly increased (P<0.05) phosphorus of the femur compared to soybean meal and autoclaved HSC-based diet and increased (P<0.05) potassium compared to soybean meal, raw HSC-based diet. The diet containing autoclaved HSC yielded the highest (P<0.05) Ca: P. The treatments had no impact (P>0.05) on magnesium of the femur. It is concluded the dietary autoclaved HSC with phytase enzyme is effective in improving the calcium, phosphorus, and potassium of the tibia and femur bone of the broiler.