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<p>Composting is regarded as an effective treatment to converts waste organic matter into fertilizer. However, nitrogen loss is a serious problem in composting. This study evaluated the effects of addition of lignite, phosphogypsum, or biochar at a ratio of 10% (w/w) on the co-composting of <i>Rosa roxburghii</i> Tratt fruit pomace (RRTP) and spent mushroom substrate (SMS). The results showed that the addition of lignite had the most positive effect on the reducing nitrogen loss. Moreover, compared with the control (without any additive), lignite, phosphogypsum, or biochar addition increased the relative abundance of the dominant bacterial (<i>Tuberibacillus</i>) during the thermophilic period and the organic matter decomposition rate and helped to meet the standard of maturity. Overall, addition of lignite, phosphogypsum, or biochar were beneficial to promote maturity when during the co-composting of RRTP and SMS. Among these additives, lignite was recommended to mitigate nitrogen loss for the co-composting of RRTP and SMS.</p> Graphical Abstract <p></p>

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Effects of Additives on Nitrogen Loss and Bacterial Community During the Co-Composting of Rosa roxburghii Tratt Fruit Pomace and Spent Mushroom Substrate

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Xiong Pan,
  • Li-juan Ge,
  • Qi-ji Li,
  • Liang-qun Li,
  • Lang Zhou,
  • Ting-fei Deng,
  • Li-shou Yang,
  • Yan-fang Yan,
  • Xiao-sheng Yang

摘要

Composting is regarded as an effective treatment to converts waste organic matter into fertilizer. However, nitrogen loss is a serious problem in composting. This study evaluated the effects of addition of lignite, phosphogypsum, or biochar at a ratio of 10% (w/w) on the co-composting of Rosa roxburghii Tratt fruit pomace (RRTP) and spent mushroom substrate (SMS). The results showed that the addition of lignite had the most positive effect on the reducing nitrogen loss. Moreover, compared with the control (without any additive), lignite, phosphogypsum, or biochar addition increased the relative abundance of the dominant bacterial (Tuberibacillus) during the thermophilic period and the organic matter decomposition rate and helped to meet the standard of maturity. Overall, addition of lignite, phosphogypsum, or biochar were beneficial to promote maturity when during the co-composting of RRTP and SMS. Among these additives, lignite was recommended to mitigate nitrogen loss for the co-composting of RRTP and SMS.

Graphical Abstract