System of Rice Intensification (SRI)

System of Rice Intensification (SRI)

About SRI technique :

  • The System of Rice Intensification(SRI) is a farming methodology aimed at increasing the yield of rice produced in farming.
  • It is a low-water, labor-intensive method that uses younger seedlings singly spaced and typically hand weeded with special tools.
  • The System of Rice Intensification involves cultivating rice with as much organic manure as possible, starting with young seedlings planted singly at wider spacing in a square pattern.

  • It involves intermittent irrigation that keeps the soil moist but not inundated, and frequent inter cultivation with weeder that actively aerates the soil.
  • SRI is not a standardised, fixed technological method.
  • It is rather a set of ideas, a methodology for comprehensively managing and conserving resources by changing the way that land, seeds, water, nutrients, and human labour are used to increase productivity from a small but well-tended number of seeds.

A comparison of SRI and conventional method of rice cultivation is as follows :

Particulars Conventional Method   SRI
Spacing 15×10 cm 25×25 cm
No of plants per sq.m 66 16
No. of seedlings per hill 3 1
No. of  plants per acre 792000 64000
Seed requirement per acre 20 kg 2 kg

SRI is initially labour intensive :

  • Needs 50% more man-days for transplanting and weeding.
  • Mobilises labour to work for profit.
  • It offers an alternative to the resource poor, who put in their family labour.
  • Once the right skills are learnt and implemented, the labour costs will be lesser.

SRI encourages rice plant to grow healthy with :

  • Large root volume
  • Profuse and strong tillers – Maximum tillering (30 tillers/plant can be easily achieved; 50 tillers per plant are quite attainable) occurs concurrently with panicle initiation.
  • Under excellent management even 100 fertile tillers per plant or even more can be achieved due to early transplanting and absence of die back of roots.
  • Non lodging
  • Big panicles
  • More and well filled grain panicles and higher grain weight
  • Resists insects because it allows rice to absorb soil nutrients naturally

Syllabus : Prelims + Mains; GS3 – Agriculture