Scholarlink

<p>Drought stress impairs plant growth soil fertility. Organic amendments like compost and biochar are increasingly recognized for their potential to mitigate environmental stresses in soil ecosystems. This study investigates their effects on the soil microbiome of a barley (<i>Hordeum vulgare</i> L.) field under drought stress. Eight treatments were established under controlled conditions: CK (control), B (biochar), C (compost), CB (compost + biochar), D (drought stress), DB (drought + biochar), DC (drought + compost), and DCB (drought + compost + biochar). High-throughput MiSeq sequencing was employed to assess changes in microbial diversity and taxonomic composition across treatments. Our study showed that the bacteria-to-fungi ratio remained stable, while alpha and beta diversity varied across treatments. Proteobacteriota and Actinobacteriota dominated the prokaryotes communities, whereas Ascomycota and Basidiomycota were the main fungal phyla. Drought (D) significantly reduced microbial diversity. DB-treatment slightly enhanced key decomposers such as Penicillium and some Proteobacteriota and Actinobacteriota but had a limited overall effect. DC-treatment produced a more pronounced impact, promoting beneficial microbes such as Firmicuteota, Talaromyces, and Sordariales, while also stimulating opportunistic taxa like Alternaria, indicating a partially beneficial yet suboptimal outcome. In contrast, DCB treatment elicited the most favorable shifts in taxonomic composition, enriching microbial groups potentially associated with stress resistance, antibiotic production, and phosphorus solubilization. It stimulated beneficial fungi that improve soil structure, water retention, and organic matter decomposition. Overall, DCB provided synergistic and balanced stimulation of beneficial soil microbiota under drought, offering a promising strategy for sustaining soil fertility and plant health under environmental stress.</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

Combined Compost and Biochar Application Maximizes Soil Microbial Resilience of Barley Crop Grown Under Drought Stress Conditions

  • 期刊论文

  • 发表日期：

    2026年7月11日

查看全文
  • Emna Ghouili,
  • Joël D’Astous-Pagé,
  • Richard Hogue,
  • Yordan Muhovski,
  • Rim Nefissi Ouertani,
  • Souhir Abdelkrim,
  • Khaled Sassi,
  • Zhengguo Li,
  • Salwa Harzalli Jebara,
  • Fatma Souissi,
  • Moez Jebara,
  • Ghassen Abid

摘要

Drought stress impairs plant growth soil fertility. Organic amendments like compost and biochar are increasingly recognized for their potential to mitigate environmental stresses in soil ecosystems. This study investigates their effects on the soil microbiome of a barley (Hordeum vulgare L.) field under drought stress. Eight treatments were established under controlled conditions: CK (control), B (biochar), C (compost), CB (compost + biochar), D (drought stress), DB (drought + biochar), DC (drought + compost), and DCB (drought + compost + biochar). High-throughput MiSeq sequencing was employed to assess changes in microbial diversity and taxonomic composition across treatments. Our study showed that the bacteria-to-fungi ratio remained stable, while alpha and beta diversity varied across treatments. Proteobacteriota and Actinobacteriota dominated the prokaryotes communities, whereas Ascomycota and Basidiomycota were the main fungal phyla. Drought (D) significantly reduced microbial diversity. DB-treatment slightly enhanced key decomposers such as Penicillium and some Proteobacteriota and Actinobacteriota but had a limited overall effect. DC-treatment produced a more pronounced impact, promoting beneficial microbes such as Firmicuteota, Talaromyces, and Sordariales, while also stimulating opportunistic taxa like Alternaria, indicating a partially beneficial yet suboptimal outcome. In contrast, DCB treatment elicited the most favorable shifts in taxonomic composition, enriching microbial groups potentially associated with stress resistance, antibiotic production, and phosphorus solubilization. It stimulated beneficial fungi that improve soil structure, water retention, and organic matter decomposition. Overall, DCB provided synergistic and balanced stimulation of beneficial soil microbiota under drought, offering a promising strategy for sustaining soil fertility and plant health under environmental stress.