Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

1914 Towards a More Sustainable Rice Crop: System of Rice Intensification (SRI) Experience in Chilean Temperate Japonica Rice

62 views

Published on

Author/Presenter: Karla Cordero Lara
Title: Towards a More Sustainable Rice Crop: System of Rice Intensification (SRI) Experience in Chilean Temperate Japonica Rice
Date: November 29-30, 2018
Presented at: The Third International Symposium on Rice Science in Global Health
Venue: Kyoto, Japan

Published in: Environment
  • Be the first to comment

  • Be the first to like this

1914 Towards a More Sustainable Rice Crop: System of Rice Intensification (SRI) Experience in Chilean Temperate Japonica Rice

  1. 1. P1-A-1 Towards a more sustainable rice crop: the Rice System Intensification (SRI) experience in Chilean temperate japonica rice. Karla Cordero Lara, Eng. Agr. M.Sc. Ph.D. Instituto de Investigaciones Agropecuarias, INIA-Chile. SRI is a set of climate-smart agroecological practices to increase rice productivity and sustainability by changing plant density, soil, water and nutrients, reducing the inputs. Even though this system has been widely used in the world; no experiences in low temperature environments have been done. To face challenging cropping conditions generated as consequences of climate change, the study of more sustainable practices are required to be able to increase the rice production. Introduction Objectives Materials and Methods Four cropping systems were established in Parral, during 2017/2018. SRI-1, SRI-2, Conventional flooding (CF) and Conventional direct sow (CDS) were conducted in RCBD with three replications. Zafiro- INIA a temperate japonica variety was used. SRI-1 consisted: 2 leaves seedlings (one plant) were transplanted in 30x30cm grid and irrigated every 8 days (weeds were controlled mechanically). SRI-2 consisted in same water and weed management as SRI-1, but 3 leaves seedlings (2 plants) were used (grid 30x12cm). CF used pregerminated seeds (160 kg/ha) and continuous flooding conditions. Weeds were controlled by herbicides. For CDS, dry seeds (140 kg/ha) were sown and irrigated twice before continuous flooding. Grain yield, sterility percentage, grain quality, days to heading, tillers number; total grain number was evaluated among others. The best yield (8 ton/ha) was CF mainly due to the weed control and thermic buffer water effect. Followed by CDS (7 t/ha), SRI-2 (6.5 t/ha) and SRI-1 (5.4 t/ha). All treatments obtained high grain quality (over 60%). SRI-1 showed in average more than 30 productive tillers per plant, meanwhile conventional methods only 7. Even though SRI methods didn’t get maximum productive levels, the results are promising considering that 6.5 t/ha were produced using only a third of water used conventionally. This shows that it is possible to produce rice in Chile not using the thermic protection of water. Results • Introduce, adapt and validate basic SRI’s principles to Chilean rice productive conditions. • Increase the sustainability in agronomic practices utilized in Chilean rice production. Results Conclusions • SRI principles are suitable for rice cultivation under cold stress. • Rice production in Chile could increase using SRI and WUE varieties Fig 1. Aerial view of different treatments under study in Parral, Chile, season 2016-2017. Fig 2 and 5. Different treatments under study in Parral, Chile, on left four treatments in vegetative stages, on right, irrigated treatments and farmers extension activities. Fig 3. Agronomic traits evaluated under four treatments. Different letters means significant differences among treatments under Test:LSD Fisher Alfa=0.05 Fig 4. Yield components evaluated under four treatments. Different letters means significant differences among treatments under Test:LSD Fisher Alfa=0.05

×