Scholarlink

<p>Nutrient losses due to leaching, volatilization, and fixation significantly limit crop productivity and pose serious environmental challenges such as groundwater contamination and greenhouse gas emissions. Addressing these challenges requires innovative approaches to enhance fertilizer efficiency and mitigate environmental impacts. This study aimed to develop and evaluate biodegradable coatings for urea and diammonium phosphate fertilizers using maize starch as an adhesive polymer matrix. Maize cob biochar, leonardite, and sewage sludge ash were employed as coating materials in varying amounts (2&#xa0;g and 3&#xa0;g). The use of different material quantities was intended to optimize nutrient release efficiency while minimizing material consumption. The results indicated that coatings with 3&#xa0;g of maize cob biochar and sewage sludge ash achieved the longest dissolution times and effectively delayed nutrient release by forming dense and hydrophobic barriers. In contrast, lower application rates (2&#xa0;g) provided less control over dissolution. For leonardite coatings, no significant difference in dissolution time or coating thickness was observed between application rates, demonstrating limited effectiveness. SEM analysis revealed smoother, denser surfaces for coated granules compared to uncoated ones. Maize cob biochar and sewage sludge ash formed more effective physical barriers than leonardite. FTIR spectra confirmed material-specific chemical interactions between coatings and fertilizers. Coated granules demonstrated significant enrichment with essential nutrients such as potassium, calcium, and magnesium and the sewage sludge ash showed the highest nutrient content. These findings suggest that when applied with optimized coating methodology and quantities, it can increase fertilizer efficiency by minimizing nutrient losses and reducing environmental impact.</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

Biodegradable polymer-based coatings for controlled and slow-release fertilizers

  • 期刊论文

  • 发表日期：

    2025年12月1日

查看全文
  • Hasine Küçükyildirim,
  • Salih Aydemir,
  • Halime Öztürk,
  • Ferhat Uğurlar

摘要

Nutrient losses due to leaching, volatilization, and fixation significantly limit crop productivity and pose serious environmental challenges such as groundwater contamination and greenhouse gas emissions. Addressing these challenges requires innovative approaches to enhance fertilizer efficiency and mitigate environmental impacts. This study aimed to develop and evaluate biodegradable coatings for urea and diammonium phosphate fertilizers using maize starch as an adhesive polymer matrix. Maize cob biochar, leonardite, and sewage sludge ash were employed as coating materials in varying amounts (2 g and 3 g). The use of different material quantities was intended to optimize nutrient release efficiency while minimizing material consumption. The results indicated that coatings with 3 g of maize cob biochar and sewage sludge ash achieved the longest dissolution times and effectively delayed nutrient release by forming dense and hydrophobic barriers. In contrast, lower application rates (2 g) provided less control over dissolution. For leonardite coatings, no significant difference in dissolution time or coating thickness was observed between application rates, demonstrating limited effectiveness. SEM analysis revealed smoother, denser surfaces for coated granules compared to uncoated ones. Maize cob biochar and sewage sludge ash formed more effective physical barriers than leonardite. FTIR spectra confirmed material-specific chemical interactions between coatings and fertilizers. Coated granules demonstrated significant enrichment with essential nutrients such as potassium, calcium, and magnesium and the sewage sludge ash showed the highest nutrient content. These findings suggest that when applied with optimized coating methodology and quantities, it can increase fertilizer efficiency by minimizing nutrient losses and reducing environmental impact.