Scholarlink

<p>Deficit irrigation (DI) enhances crop water use efficiency by moderately reducing the water supply; however, excessive DI poses risks of yield reduction and quality deterioration. Biochar addition (BA) improves soil structure and enhances water/nutrient retention capacity, but its efficacy in mitigating crop water stress varies with application rates. A two-season greenhouse experiment was conducted with distinct BA application rates (B0, B1, B2: 0, 25, 50 t ha⁻¹) and DI treatments (W1, W2, W3: 0.6 <i>K</i><sub><i>p</i></sub>, 0.8 <i>K</i><sub><i>p</i></sub>, 1.0 <i>K</i><sub><i>p</i></sub>). This study examined the combined effects of BA and DI on tomato growth parameters, physiological indicators, fruit quality, and economic value. Key findings include: BA significantly alleviated DI stress. Under moderate DI (W2), the B2W2 treatment increased the LAI and SPAD values by 28.7% and 7.3%, respectively, and actual photochemical quantum yield (YII) by 11.5–15.5%, compared to the B0W1 treatment. Synergistic optimization of quality and water use: B2W2 elevated total soluble solids, single-fruit weight, and solid-acid ratio by 23.2–33.3% versus non-BA groups (B0W2), with irrigation water use efficiency increasing by 17.8–23.9%. BA enhanced tomato yield: B2W3 boosted yield by 25.3–37.0% compared to B0W1, exhibiting a nonlinear yield response where benefits plateaued at higher BA rates. The entropy weight combined with TOPSIS method (EWM-TOPSIS) comprehensive evaluation ranked that the B2W2, B1W3, and B2W3 as the top three treatments across both seasons, considering growth-physiology indicators, economic value, and production costs. This study confirms that integrating biochar with deficit irrigation is a viable strategy to optimize crop production and water utilization, particularly in water-scarce regions. Future research should elucidate region-specific synergies between BA and DI under diverse soil conditions to develop precision management protocols that are tailored to specific areas.</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

Determination of optimal biochar application and irrigation rate for tomatoes based on the EWM-TOPSIS evaluation method

  • 期刊论文

  • 发表日期：

    2025年11月29日

查看全文
  • Yue Jiang,
  • BingYu Li,
  • XuYing Wang,
  • Bin Shi

摘要

Deficit irrigation (DI) enhances crop water use efficiency by moderately reducing the water supply; however, excessive DI poses risks of yield reduction and quality deterioration. Biochar addition (BA) improves soil structure and enhances water/nutrient retention capacity, but its efficacy in mitigating crop water stress varies with application rates. A two-season greenhouse experiment was conducted with distinct BA application rates (B0, B1, B2: 0, 25, 50 t ha⁻¹) and DI treatments (W1, W2, W3: 0.6 Kp, 0.8 Kp, 1.0 Kp). This study examined the combined effects of BA and DI on tomato growth parameters, physiological indicators, fruit quality, and economic value. Key findings include: BA significantly alleviated DI stress. Under moderate DI (W2), the B2W2 treatment increased the LAI and SPAD values by 28.7% and 7.3%, respectively, and actual photochemical quantum yield (YII) by 11.5–15.5%, compared to the B0W1 treatment. Synergistic optimization of quality and water use: B2W2 elevated total soluble solids, single-fruit weight, and solid-acid ratio by 23.2–33.3% versus non-BA groups (B0W2), with irrigation water use efficiency increasing by 17.8–23.9%. BA enhanced tomato yield: B2W3 boosted yield by 25.3–37.0% compared to B0W1, exhibiting a nonlinear yield response where benefits plateaued at higher BA rates. The entropy weight combined with TOPSIS method (EWM-TOPSIS) comprehensive evaluation ranked that the B2W2, B1W3, and B2W3 as the top three treatments across both seasons, considering growth-physiology indicators, economic value, and production costs. This study confirms that integrating biochar with deficit irrigation is a viable strategy to optimize crop production and water utilization, particularly in water-scarce regions. Future research should elucidate region-specific synergies between BA and DI under diverse soil conditions to develop precision management protocols that are tailored to specific areas.