SRI (system of rice intensification)

  • SRI is not a fixed package of technical specifications, but a system of production with four main components, viz., soil fertility management, planting method, weed control and water (irrigation) management
  • Fr. Henry de Laulaine developed this system in Madagascar .
  • In SRI, young seedlings (8-10 days old) are transplanted at optimal spacing (25 X 25 cm2, about 16 plants per square meter) and the crop is aerobically grown during vegetative phase.
  • SRI requires the root zone to be kept moist, not submerged. Water applications can be intermittent, leaving plant roots with sufficiency, rather than surfeit of water
  • Evidences have shown that SRI gave higher yields than transplant crop in South India only.
    The SRI also proved better in clay loams than sandy loam, clay or silty loam soils.
  • The increase in yield with SRI has been attributed to more panicles and grater panicle weight.
  • It economizes up to 50% of water for rice cultivation.