Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Effects of Cutting Length on Fermentation Characteristics and Aerobic Stability of Whole Crop Rice Silage

  • Lee, Seong Shin (Institute of Agriculture & Life Science, Gyeongsang National University) ;
  • Joo, Young Ho (Institute of Agriculture & Life Science, Gyeongsang National University) ;
  • Choi, Jeong Seok (Division of Applied Life Science (BK21Plus), Gyeongsang National University) ;
  • Jeong, Seung Min (Division of Applied Life Science (BK21Plus), Gyeongsang National University) ;
  • Paradhipta, Dimas Hand Vidya (Faculty of Animal Science, Universitas Gadjah Mada) ;
  • Noh, Hyeon Tak (Division of Applied Life Science (BK21Plus), Gyeongsang National University) ;
  • Kim, Sam Churl (Institute of Agriculture & Life Science, Gyeongsang National University)
  • Received : 2021.08.25
  • Accepted : 2021.09.15
  • Published : 2021.09.30
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Abstract

This study was conducted to estimate the effect of different cutting lengths on fermentation characteristics and aerobic stability of whole crop rice (WCR) silage. The WCR was harvested at the yellow ripe stage (43.7%, DM), and then cut at 5 (R05), 10 (R10), and 20 cm (R20) of the theoretical length of cut with no cut WCR (R60). Each forage was ensiled into 20 L mini bucket silo (5 kg) for 150 days in quadruplicates. The cutting lengths were not affected the chemical compositions of WCR silage (p > 0.05). The pH (p < 0.001) and concentration of ammonia-N (p = 0.022) in WCR silage were increased linearly with the increase of cutting length. The concentration of lactate had quadratic effect (p = 0.007), which was highest in R20 silage (p < 0.05). The concentration of acetate was increased linearly (p = 0.014), but the concentration of butyrate was decreased linearly (p = 0.033). The lactic acid bacteria count was decreased linearly (p = 0.017), and yeast count had quadratic effect (p = 0.009), which was the highest in R20 silage (p < 0.05). Aerobic stability had strong quadratic effect (p < 0.001), which was the highest in R20 silage (p < 0.05). In conclusion, R60 silage had highest pH by a linear increase of ammonia-N concentration and led to low aerobic stability. While R20 silage had the lowest pH by high lactate concentration and led to high aerobic stability.

Keywords

Acknowledgement

This research was supported (Project No. 319039-03-2-HD020) by IPET (Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries), and Ministry of Agriculture, Food and Rural Affairs, Republic of Korea.

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