Scholarlink

Purpose <p>Greenhouse gases (GHGs) are major reasons for climate change. The intensity of GHGs is continuously increasing in agricultural soils due to intensive practices. Biochar (BC) is an effective measure to mitigate GHGs and improve ecosystem services. However, the efficiency of BC in mitigating nitrous oxide (N<sub>2</sub>O) emissions remains debatable. In recent years, BC, when combined with other amendments, has shown promising results in mitigating N<sub>2</sub>O emissions. Recently, seaweed-based fertilizers (SBF) have shown promising results in improving crop productivity; however, their role in reducing GHG emissions is still unclear.</p> Method <p>This study investigated the impact of BC, SBF, and co-application of BC and SBF on N<sub>2</sub>O emissions, soil rejuvenation, canonical ammonia oxidizers, and <i>comammox</i>, bacterial abundance, and rice growth and yield. The study contained different treatments: control, BC (2%), SBF (2%), and BC (1%) + SBF (1%).</p> Results <p>The co-application of BC + SBF increased soil pH (&gt; 20%), triggered the transformation of soil nitrogen dynamics, increased soil carbon (92.74%), <i>nosZ</i> genes abundance (107%) and decreased ammonia-oxidizing archaea (<i>AOA</i>) (27%), and ammonia-oxidizing bacteria (<i>AOB</i>) (45%) abundance leading to a significant decrease in N<sub>2</sub>O emissions (63.15%). The integrative application of BC and SBF also significantly increased <i>Acidobacteriota</i>,<i> Bacterioidetes</i>, <i>Chloroflexi</i>, <i>Proteobacteria</i>, and <i>Nitrospirae</i>, contributing to a significant decrease in N<sub>2</sub>O emissions. Integrative BC and SBF also enhanced rice productivity and quality, which was linked with improved soil nutrient availability, carbon sequestration, and soil enzyme activities.</p> Conclusion <p>In conclusion, the BC and SBF blend could be a promising amendment to mitigate N<sub>2</sub>O emissions and improve soil fertility, microbial activities, and rice productivity.</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

Biochar-Seaweed Fertilizer Blend: A Multifaceted Strategy for Mitigating Nitrous Oxide Emissions, Soil Rejuvenation, and Improving Rice Crop Performance

  • 期刊论文

  • 发表日期：

    2025年10月23日

查看全文
  • Muhammad Aamer,
  • Huang Guoqin,
  • Jiaen Zhang,
  • Hui Wei,
  • Fahd Rasul,
  • Daolin Sun,
  • Wenyun Huang,
  • Shijie Liu,
  • Abdul Haseeb,
  • Tahani A. Y. Asseri,
  • Mohamed Hashem

摘要

Purpose

Greenhouse gases (GHGs) are major reasons for climate change. The intensity of GHGs is continuously increasing in agricultural soils due to intensive practices. Biochar (BC) is an effective measure to mitigate GHGs and improve ecosystem services. However, the efficiency of BC in mitigating nitrous oxide (N2O) emissions remains debatable. In recent years, BC, when combined with other amendments, has shown promising results in mitigating N2O emissions. Recently, seaweed-based fertilizers (SBF) have shown promising results in improving crop productivity; however, their role in reducing GHG emissions is still unclear.

Method

This study investigated the impact of BC, SBF, and co-application of BC and SBF on N2O emissions, soil rejuvenation, canonical ammonia oxidizers, and comammox, bacterial abundance, and rice growth and yield. The study contained different treatments: control, BC (2%), SBF (2%), and BC (1%) + SBF (1%).

Results

The co-application of BC + SBF increased soil pH (> 20%), triggered the transformation of soil nitrogen dynamics, increased soil carbon (92.74%), nosZ genes abundance (107%) and decreased ammonia-oxidizing archaea (AOA) (27%), and ammonia-oxidizing bacteria (AOB) (45%) abundance leading to a significant decrease in N2O emissions (63.15%). The integrative application of BC and SBF also significantly increased Acidobacteriota, Bacterioidetes, Chloroflexi, Proteobacteria, and Nitrospirae, contributing to a significant decrease in N2O emissions. Integrative BC and SBF also enhanced rice productivity and quality, which was linked with improved soil nutrient availability, carbon sequestration, and soil enzyme activities.

Conclusion

In conclusion, the BC and SBF blend could be a promising amendment to mitigate N2O emissions and improve soil fertility, microbial activities, and rice productivity.