Scholarlink

<p>Soil acidification severely limits peanut productivity. Although lime and biochar can individually improve soil conditions, the effects are often short-lived. The combined effect of biochar and lime (BL) across multiple growing seasons remains unclear. This three-year field study investigated the synergy of biochar-lime co-application (BL) in remediating acidic soils and sustaining peanut yields under continuous cropping. BL was more effective than single amendments (BC/LM), operating through a dual mechanism: (1) Lime rapidly neutralized toxic aluminum (Ex-Al³⁺), while biochar helped retain Ca²⁺, prolonging the pH buffering effect and further reducing aluminum toxicity; (2) Biochar enriched soil microbial communities, which increased the activity of key enzymes involved in nutrient cycling (urease: +49.84%; phosphatase: +46.14%). This improved soil environment reduced oxidative stress in peanuts (MDA: −20.01%) and enhanced their antioxidant defense system (SOD: +27.46%; POD: +34.60%), leading to higher and more stable yields (+ 11.07–27.26% vs. CK) with less year-to-year variation (− 4.66% yield decline). Economically, the lasting effects of BL allowed for a 53% reduction in amendment inputs by the third year, resulting in a 22.91% higher net income than using lime alone. These results demonstrate that BL co-application is a promising strategy for managing acidic soils by simultaneously addressing chemical and biological constraints in continuous cropping systems.</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

Synergistic effects of biochar-lime enhance acidic soil remediation and sustain peanut productivity under continuous cropping systems

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月7日

查看全文
  • Qihong Tu,
  • Panyue Zhao,
  • Yanqiong Li,
  • Guoqing Liu,
  • Jianyong Liu

摘要

Soil acidification severely limits peanut productivity. Although lime and biochar can individually improve soil conditions, the effects are often short-lived. The combined effect of biochar and lime (BL) across multiple growing seasons remains unclear. This three-year field study investigated the synergy of biochar-lime co-application (BL) in remediating acidic soils and sustaining peanut yields under continuous cropping. BL was more effective than single amendments (BC/LM), operating through a dual mechanism: (1) Lime rapidly neutralized toxic aluminum (Ex-Al³⁺), while biochar helped retain Ca²⁺, prolonging the pH buffering effect and further reducing aluminum toxicity; (2) Biochar enriched soil microbial communities, which increased the activity of key enzymes involved in nutrient cycling (urease: +49.84%; phosphatase: +46.14%). This improved soil environment reduced oxidative stress in peanuts (MDA: −20.01%) and enhanced their antioxidant defense system (SOD: +27.46%; POD: +34.60%), leading to higher and more stable yields (+ 11.07–27.26% vs. CK) with less year-to-year variation (− 4.66% yield decline). Economically, the lasting effects of BL allowed for a 53% reduction in amendment inputs by the third year, resulting in a 22.91% higher net income than using lime alone. These results demonstrate that BL co-application is a promising strategy for managing acidic soils by simultaneously addressing chemical and biological constraints in continuous cropping systems.