Feeding behavior and dry matter digestibility in sheep fed first and second cut reed canary grass (Phalaris arundinacea L.)

Abstract

We investigated the intake and digestibility of different reed canarygrass (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 monitored on adult female sheep, fed 3 kg each of fresh RCG three times daily. While the crude protein content and dry matter digestibility of RCG were significantly higher in leaf than in stem tissue of both first and second cut in harvesting times, 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 (214.1 g). The eating time for consumption of RCG on dry matter at the second cut (54.9 min) was shorter than at the first cut (69.4 min). Consequently, at the second cut, the rate of biting (54.6 bites/min) was lower than at the first cut (64.8 bites/min). Bite size, expressed as dry matter intake per bite, ranged from 0.05 g at first cut to 0.10 g at second cut.

Effects of inoculants on the fermentation characteristics and in vitro digestibility of reed canary grass (Phalaris arundinacea L.) silage on the Qinghai‐Tibetan Plateau

“…Previous study has illustrated that RCG silage produced using glucose, formic acid, and tannic acid could change the fermentation characteristics with reduction of acetic acid and ammonia-N (Tokita et al, 2015). However, the effects of biological additives on RCG silage fermentation remained unclear.…”

“…Previous studies have also shown that inoculants with a mixture of LAB and cellulase resulted in a considerable improvement in silage quality (Hou, Gentu, Jia, & Cai, 2017; Khota, Pholsen, Higgs, & Cai, 2016; Meeske, Basson, & Cruywagen, 1999; Sun et al, 2012). Although studies have reported the fermentation characteristics of RCG silage in the USA (Cherney, Alessi, & Cherney, 2006; Kammes et al, 2008), Canada (Bélanger et al, 2016), and Japan (Tokita et al, 2015), there is little information on the fermentation characteristics of inoculated RCG silage on the Qinghai‐Tibetan Plateau with inherently extreme and unstable climate.…”