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Acta Prataculturae Sinica ›› 2022, Vol. 31 ›› Issue (6): 202-210.DOI: 10.11686/cyxb2021176

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Effects of addition of Neolamarckia cadamba leaves and chitosan oligosaccharides on fermentation quality and aerobic stability of sugarcane top silage

Xiang GUO(), Shuo WU, Ming-yang ZHENG, De-kui CHEN, Xuan ZOU, Xiao-yang CHEN, Wei ZHOU(), Qing ZHANG()   

  1. College of Forestry and Landscape Architecture,South China Agricultural University,Guangdong Province Research Center of Woody Forage Engineering Technology,Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm,State Key Laboratory for Conservaion and Utilization of Subtropical Agro-bioresources,Guangzhou 510642,China
  • Received:2021-05-07 Revised:2021-07-19 Online:2022-06-20 Published:2022-05-11
  • Contact: Wei ZHOU,Qing ZHANG

Abstract:

The purpose of this study was to investigate the effect of adding Neolamarckia cadamba leaves (NCL) on the fermentation quality and aerobic stability of sugarcane top silage with or without chitosan oligosaccharides (CO). There were 6 treatments in the experiment: No addition (control, CK), 15%NCL, 30%NCL, CO, 15%NCL+ CO, and 30%NCL+CO. After 210 days, the ensiled materials were analyzed for fermentation quality. The analyses showed that NCL treatments significantly decreased (P<0.05) the pH, the non-protein-N (NPN) and ammonia-N (NH3-N) contents and significantly increased (P<0.05) the lactic acid (LA), acetic acid (AA), crude protein (CP), and true protein contents. After aerobic exposure for 7 days, the pH (P<0.05), NPN content, and NH3-N content (P<0.01) decreased in the NCL treatment, but the CP content increased (P<0.01) in the NCL and CO treatments. In addition, the LA content increased (P<0.01) in the NCL treatment. The 30%NCL, 15%NCL+CO, and 30%NCL+ CO treatments improved (P<0.05) aerobic stability. In summary, the addition of both NCL and CO had positive effects on the fermentation quality and aerobic stability of sugarcane top silage, and the 15%NCL+CO treatment performed better than the other treatments.

Key words: sugarcane top, Neolamarckia cadamba, chitosan oligosaccharide, fermentation quality, aerobic stability