Scholarlink

<p>Efficient irrigation scheduling is critical for sweetpotato (<i>Ipomoea batatas</i> (L.) Lam.), a crop valued for both food and nutrition security. Field trials were conducted over three consecutive seasons (2020/21–2022/23) at ICAR-CTCRI, Kerala, to evaluate seven irrigation treatments comprising graded drip levels (50–150% of crop evapotranspiration, ETc), sprinkler, and furrow methods. Irrigation significantly influenced tuber yield, irrigation water productivity (IWP), total water productivity (TWP), leaf area index (LAI), soil moisture, and mean tuber weight. Yield peaked at 100% ETc (23.2 t ha⁻¹), exceeding those achieved with sprinkler (14.4 t ha⁻¹) and furrow (16.6 t ha⁻¹) irrigation. Soil moisture (0–30&#xa0;cm) increased proportionally with irrigation, reaching approximately 14.7% under 100% ETc compared with approximately 8.7% at 50% ETc. IWP was highest under deficit drip (50–75% ETc: 14–16&#xa0;kg m⁻³), while TWP peaked under mild deficit (approximately 63–75% ETc). Quadratic regression identified optimum yield and TWP optima levels near 112% and 63% ETc, respectively, underscoring a trade-off between yield maximisation and water productivity. Irrigation at 100% ETc is therefore optimal when yield is prioritised, whereas moderate deficit irrigation improves water productivity under limited-water conditions.</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

Balancing yield and water productivity in sweetpotato through crop evapotranspiration–based irrigation scheduling across seasons

  • 期刊论文

  • 发表日期：

    2025年12月29日

查看全文
  • Sunitha Sarojini Amma,
  • Saravanan Raju,
  • Suresh Kumar Jabu,
  • Ramesh Varadharajan,
  • Suja Girija

摘要

Efficient irrigation scheduling is critical for sweetpotato (Ipomoea batatas (L.) Lam.), a crop valued for both food and nutrition security. Field trials were conducted over three consecutive seasons (2020/21–2022/23) at ICAR-CTCRI, Kerala, to evaluate seven irrigation treatments comprising graded drip levels (50–150% of crop evapotranspiration, ETc), sprinkler, and furrow methods. Irrigation significantly influenced tuber yield, irrigation water productivity (IWP), total water productivity (TWP), leaf area index (LAI), soil moisture, and mean tuber weight. Yield peaked at 100% ETc (23.2 t ha⁻¹), exceeding those achieved with sprinkler (14.4 t ha⁻¹) and furrow (16.6 t ha⁻¹) irrigation. Soil moisture (0–30 cm) increased proportionally with irrigation, reaching approximately 14.7% under 100% ETc compared with approximately 8.7% at 50% ETc. IWP was highest under deficit drip (50–75% ETc: 14–16 kg m⁻³), while TWP peaked under mild deficit (approximately 63–75% ETc). Quadratic regression identified optimum yield and TWP optima levels near 112% and 63% ETc, respectively, underscoring a trade-off between yield maximisation and water productivity. Irrigation at 100% ETc is therefore optimal when yield is prioritised, whereas moderate deficit irrigation improves water productivity under limited-water conditions.