Scholarlink

Background <p>Limiting warming-induced increases in paddy NH<sub>3</sub> volatilization (NV) and greenhouse gas (GHG) emissions is critical. While hydrochar reduce both, its efficacy under warming remains unclear.</p> Results <p>To address this gap, an in-situ microcosm column experiment was employed to examine the impact of hydrochar addition on NV and GHG emissions from paddies under experimental warming (ET, 1.1 ~ 1.3&#xa0;°C) and ambient control (AC), with (WHC) and without hydrochar (CKU). Results showed no significant interactive effects between warming and hydrochar on cumulative NV, seasonal CH<sub>4</sub> and N<sub>2</sub>O emissions. Compared to AC, ET treatments unsurprisingly increased NV and GHG emissions, with significant differences in NV and CH<sub>4</sub> emissions. Fortunately, WHC treatment not only reduced CH<sub>4</sub> emissions under both temperature conditions but also tended to decrease N<sub>2</sub>O emissions under warming conditions. Notably, under ambient control conditions, WHC treatment reduced NV by 29.60% compared to CKU, whereas, under warming conditions, NV losses were comparable between the two treatments. Moreover, N concentration and soil physicochemical properties (pH, carbon and nitrogen contents) were identified as the primary factors determining NV and CH<sub>4</sub> emissions, respectively, whilst N<sub>2</sub>O emissions were influenced by soil pH, dissolved organic carbon, and microbial (<i>nir</i>K and AOA genes).</p> Conclusions <p>Overall, hydrochar can mitigate warming-induced paddy GHG emissions but not the increase in NV, which warrants attention.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Hydrochar can mitigate the warming-induced paddy GHG emissions but not the increase in NH3 volatilization

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月24日

查看全文
  • Tingting Xu,
  • Chen Han,
  • Yanfang Feng,
  • Yu Jiang,
  • Pengfu Hou,
  • Ganghua Li,
  • Lihong Xue,
  • Linzhang Yang,
  • Yanfeng Ding

摘要

Background

Limiting warming-induced increases in paddy NH3 volatilization (NV) and greenhouse gas (GHG) emissions is critical. While hydrochar reduce both, its efficacy under warming remains unclear.

Results

To address this gap, an in-situ microcosm column experiment was employed to examine the impact of hydrochar addition on NV and GHG emissions from paddies under experimental warming (ET, 1.1 ~ 1.3 °C) and ambient control (AC), with (WHC) and without hydrochar (CKU). Results showed no significant interactive effects between warming and hydrochar on cumulative NV, seasonal CH4 and N2O emissions. Compared to AC, ET treatments unsurprisingly increased NV and GHG emissions, with significant differences in NV and CH4 emissions. Fortunately, WHC treatment not only reduced CH4 emissions under both temperature conditions but also tended to decrease N2O emissions under warming conditions. Notably, under ambient control conditions, WHC treatment reduced NV by 29.60% compared to CKU, whereas, under warming conditions, NV losses were comparable between the two treatments. Moreover, N concentration and soil physicochemical properties (pH, carbon and nitrogen contents) were identified as the primary factors determining NV and CH4 emissions, respectively, whilst N2O emissions were influenced by soil pH, dissolved organic carbon, and microbial (nirK and AOA genes).

Conclusions

Overall, hydrochar can mitigate warming-induced paddy GHG emissions but not the increase in NV, which warrants attention.

Graphical abstract