Intake and digestibility by sheep of different growth stages of reed canarygrass (Phalaris arundinacea L.)

We investigated the intake and digestibility of different reed canary-grass (RCG) growth stages by sheep. RCG was cultivated in an experimental field and harvested at the first and second cuts at each pre-blooming stage. Feeding behavior was observed on adult female sheep, fed 3 kg each of fresh RCG three times daily. Although the crude protein content and dry matter digestibility of RCG were significantly higher in leaf than in stem tissue at both harvesting times, both neutral and acid detergent fiber contents were higher in stem than in leaf. The dry matter intake of RCG at the second cut (296.1g) was significantly higher than at the first cut. The eating time for consumption of dry matter at the second cut (54.9 min) was shorter than at the first cut. Consequently, at the second cut, the rate of biting (54.6 bites/min) was lower than at the first cut. Bite size, expressed as dry matter intake per bite, ranged from 0.05 g at first cut to 0.10 g at second cut