Scholarlink

<p>The adoption of direct-seeded rice (DSR) in the Indo-Gangetic Plains is progressing rapidly due to increasing water scarcity and rising labour costs; however, its productivity continues to be constrained by variability in soil physical conditions and irrigation practices. A critical knowledge gap exists regarding the combined influence of soil compaction and irrigation scheduling on soil hydraulic behaviour and crop performance under contrasting soil textures. To address this, a two-year field experiment (<i>kharif</i> 2021–2022) was conducted at Punjab Agricultural University, Ludhiana, to evaluate their interactive effects on soil properties, moisture dynamics and productivity of DSR grown on sandy loam and silty clay loam soils. The experiment was laid out in a split-split plot design with three timings of first irrigation (7, 14 and 21 days after sowing (DAS)), two irrigation thresholds (25 and 35&#xa0;kPa), and three compaction levels (C<sub>0</sub>, C<sub>1</sub> and C<sub>2</sub>). Results indicated that increasing compaction significantly increased bulk density (~ 6%) while reducing porosity (7–9%), infiltration rate and saturated hydraulic conductivity (85–225%). However, soil moisture retention improved under higher compaction, whereas maximum water holding capacity remained higher under non-compacted conditions. Delayed first irrigation (21 DAS) significantly enhanced grain yield, while C<sub>2</sub> and C<sub>1</sub> recorded maximum yields in sandy loam and silty clay loam soils, respectively. Integrated water balance analysis revealed that delayed first irrigation and controlled soil compaction reduced deep drainage losses, improved root-zone water retention and enhanced water productivity under DSR. The findings demonstrate that optimized compaction and irrigation scheduling can regulate soil hydraulic behaviour, improve hydrological efficiency and sustain DSR productivity across contrasting soil textures.</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

Soil compaction-irrigation interactions and their implications for water use efficiency and productivity of direct-seeded rice in the Indo-Gangetic Plains

  • 期刊论文

  • 发表日期：

    2026年6月26日

查看全文
  • Malkit Singh,
  • Meharban Singh Kahlon,
  • Jasvir Singh Gill,
  • Makhan Singh Bhullar,
  • Amandeep Singh Sidhu,
  • Satinder Singh Brar,
  • Ajaypal Singh

摘要

The adoption of direct-seeded rice (DSR) in the Indo-Gangetic Plains is progressing rapidly due to increasing water scarcity and rising labour costs; however, its productivity continues to be constrained by variability in soil physical conditions and irrigation practices. A critical knowledge gap exists regarding the combined influence of soil compaction and irrigation scheduling on soil hydraulic behaviour and crop performance under contrasting soil textures. To address this, a two-year field experiment (kharif 2021–2022) was conducted at Punjab Agricultural University, Ludhiana, to evaluate their interactive effects on soil properties, moisture dynamics and productivity of DSR grown on sandy loam and silty clay loam soils. The experiment was laid out in a split-split plot design with three timings of first irrigation (7, 14 and 21 days after sowing (DAS)), two irrigation thresholds (25 and 35 kPa), and three compaction levels (C0, C1 and C2). Results indicated that increasing compaction significantly increased bulk density (~ 6%) while reducing porosity (7–9%), infiltration rate and saturated hydraulic conductivity (85–225%). However, soil moisture retention improved under higher compaction, whereas maximum water holding capacity remained higher under non-compacted conditions. Delayed first irrigation (21 DAS) significantly enhanced grain yield, while C2 and C1 recorded maximum yields in sandy loam and silty clay loam soils, respectively. Integrated water balance analysis revealed that delayed first irrigation and controlled soil compaction reduced deep drainage losses, improved root-zone water retention and enhanced water productivity under DSR. The findings demonstrate that optimized compaction and irrigation scheduling can regulate soil hydraulic behaviour, improve hydrological efficiency and sustain DSR productivity across contrasting soil textures.