Paddy and Water Environment

, Volume 16, Issue 4, pp 887–891 | Cite as

High-yield SRI in West Java by decomposing straw in waterlogged paddy field

  • Masato OdaEmail author
  • Kazunobu Toriyama
  • Shigeki Yokoyama
Short Communication


System of Rice Intensification (SRI) often achieved higher yield than conventional practice. We identified the high-yielding farmers from the yield records of 1909 paddy fields belonging to an organic farmers’ association. Farmers whose yields were from 8.4 to 10.4 t ha−1 were interviewed and their fields surveyed. Their yields had increased by an estimated average of 40% following the adoption of SRI practices. They applied 2–12 t ha−1 of compost. Compared to the conventional practice, they shortened seedling age at transplanting from 27.4 to 17.6 days and reduced the number of seedlings per hill from 4–6 to 2–3, while hill spacing remained unchanged. Instead of intermittent irrigation which is recommended in standard SRI, they kept shallow flooding of 1–2 cm. Although they applied a lot of compost, no correlation was found between the amount of compost application and the yields. Instead, high-yielding farmers returned rice straw into waterlogged paddy after harvest, which presumably is an ideal condition for biological nitrogen fixation. This may occur around rice straw during decomposition under waterlogged condition and might supplement the negative nitrogen balance, thereby enabling the high yield as compared with conventional practices where the fresh rice straw is removed and/or burned.


Soil carbon Biological nitrogen fixation Nitrogen balance Indonesia Sustainable agriculture 


  1. App AA, Watanabe I, Alexander M et al (1980) Nonsymbiotic nitrogen fixation associated with the rice plant in flooded soils. Soil Sci. Accessed 18 Aug 2017
  2. Kassam A, Stoop W, Uphoff N (2011) Review of SRI modifications in rice crop and water management and research issues for making further improvements in agricultural and water productivity. Paddy Water Environ 9:163–180CrossRefGoogle Scholar
  3. Roger PA, Ladha JK (1992) Biological N2 Fixation in wetland rice fields: estimation and contribution to nitrogen balance. Plant Soil 141:41–55. CrossRefGoogle Scholar
  4. Uphoff NT (2015) The system of rice intensification (SRI) responses to frequently asked questions. SRI-Rice, Cornell University.
  5. Tanaka H, Kyaw KM, Toyota K, Motobayashi T (2006) Influence of application of rice straw, farmyard manure, and municipal biowastes on nitrogen fixation, soil microbial biomass N, and mineral N in a model paddy microcosm. Biol Fertil Soils 42:501–505. CrossRefGoogle Scholar
  6. Thakur AK, Uphoff NT, Stoop WA (2016) Scientific underpinnings of the system of rice intensification (SRI): what is known so far? In: Advances in agronomy, pp 147–179Google Scholar
  7. Yokoyama S (2011) Diffusion process of organic SRI (System of Rice Intensification) in Indonesia: a case of unique synergy between farmer, government and private sectors. In: Program Book 7th Asian Crop Science Association Conference, pp 209–210Google Scholar
  8. Yoneyama T, Lee K-K, Yoshida T (1977) Decomposition of rice residues in tropical soils. Soil Sci Plant Nutr 23:287–295. CrossRefGoogle Scholar
  9. Yoo I-D, Kimura M, Wada H, Takai Y (1991a) Organic constituents of rice straw contributed to the biological N2 fixation in paddy field: model experiment. Jpn J Soil Sci Plant Nutr 62:219–225Google Scholar
  10. Yoo I-D, Kimura M, Wada H, Takai Y (1991b) Successions and activities of N2 fixing microorganisms in the paddy field surface-applied with rice straw. Jpn J Soil Sci Plant Nutr 62:339–344Google Scholar

Copyright information

© The International Society of Paddy and Water Environment Engineering and Springer Japan KK, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Japan International Research Center for Agricultural SciencesTsukubaJapan

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