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Aims <p>Interannual variability in water availability limits the efficient use of environmental resources in rainfed agricultural systems. This study aimed (i) to evaluate the performance of non-intensified (NIN) and intensified (IN) cropping sequences under rainfed (Rf) and subsurface drip irrigation (SDI) conditions, and (ii) to quantify water productivity (WPg) and radiation productivity (RPg) in glucose equivalent.</p> Methods <p>Experiments were conducted in the Argentine Pampas (33°57′S; 60°34′W) over two consecutive years with contrasting rainfall patterns. Water and radiation capture and use efficiencies were calculated for both annual crops and cropping sequences.</p> Results <p>SDI significantly increased glucose equivalent yield (EY) compared with Rf (+ 28% and + 77% across two years; <i>p</i> &lt; 0.001) and reduced interannual variability (0.4% CV). It also enhanced grain yield, remaining biomass, and on average water productivity (WPg, + 27%) and radiation productivity (RPg, + 49%). These effects were explained by higher efficiencies of water use (+ 21%), water capture (+ 4%), radiation use (+ 24%), and radiation capture (+ 16%). In the drier year, IN under Rf partially mitigated yield losses due to field pea/maize performance, although it negatively affected other crops (Cover Crops/Soybean, Wheat/Soybean) because of lower initial soil water.</p> Conclusions <p>Results provide an alternative to improve and stabilize crop production while optimizing environmental resource use, offering a promising strategy for sustainable intensification in water-limited systems.</p>

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Subsurface drip irrigation improving resource productivity in agricultural systems at different intensification levels

  • 期刊论文

  • 发表日期：

    2026年3月14日

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  • José Andrés Llovet,
  • Alberto Mario Peper

摘要

Aims

Interannual variability in water availability limits the efficient use of environmental resources in rainfed agricultural systems. This study aimed (i) to evaluate the performance of non-intensified (NIN) and intensified (IN) cropping sequences under rainfed (Rf) and subsurface drip irrigation (SDI) conditions, and (ii) to quantify water productivity (WPg) and radiation productivity (RPg) in glucose equivalent.

Methods

Experiments were conducted in the Argentine Pampas (33°57′S; 60°34′W) over two consecutive years with contrasting rainfall patterns. Water and radiation capture and use efficiencies were calculated for both annual crops and cropping sequences.

Results

SDI significantly increased glucose equivalent yield (EY) compared with Rf (+ 28% and + 77% across two years; p < 0.001) and reduced interannual variability (0.4% CV). It also enhanced grain yield, remaining biomass, and on average water productivity (WPg, + 27%) and radiation productivity (RPg, + 49%). These effects were explained by higher efficiencies of water use (+ 21%), water capture (+ 4%), radiation use (+ 24%), and radiation capture (+ 16%). In the drier year, IN under Rf partially mitigated yield losses due to field pea/maize performance, although it negatively affected other crops (Cover Crops/Soybean, Wheat/Soybean) because of lower initial soil water.

Conclusions

Results provide an alternative to improve and stabilize crop production while optimizing environmental resource use, offering a promising strategy for sustainable intensification in water-limited systems.