Water Saving for Paddy Cultivation by SRI (System of Rice Intensification) Experience of Decentralized Irrigation System Improvement Project in Eastern Region of Indonesia (DISIMP) JBIC ODA Loan 7 March 2006 by Shuichi SATO Team Leader of the Consultant for DISIMP Nippon Koei Co., Ltd.
Irrigation Development in Eastern Indonesia Characteristics of Eastern Indonesia Irrigation Development in Eastern Indonesia
Limited water resources
Remote location / poor transport infrastructure
Less development / investment in the past
Government policies to develop eastern Indonesia started in the 1980s.
Since 1990, SSIMP-DISIMP has continued to play a key role for water
resources and irrigation development
in eastern Indonesia.
SSIMP = Small Scale Irrigation Management Project DISIMP = Decentralized Irrigation System Improvement Project in Eastern Region of Indonesia (= SSIMP-IV)
Outline of SSIMP-DISIMP Project Objective Poverty alleviation by improving agricultural productivity and farmers’ income through water resources and irrigation development / improvement and capacity building in Eastern Region of Indonesia . Performance of SSIMP-DISIMP (JBIC Loan)
In Japan, since 1980, research on translanting of young seedling
has been done from viewpoint of cost saving .
Results of findings on use of younger seedlings were the same as SRI.
By 1990, mechanized trasnplating technology for younger seedling
was estabsliched and a manual was published.
Nursery Bed for Young Seedlings Transplanter of Young Seedling (3 hrs/ha)
Field Preparation for SRI Digging of filed drain in plot for SRI Intermittent Irrigation Drainage pipe at plot bund Marking for transplanting (30 cm x 30 cm)
Preparation of Seedlings and SRI Transplanting Seeding on nursery plate young seedling (10 days after seeding) SRI Transplanting of single young seedling (7 – 14 days after seeding) at wider spacing (30 cm x 30 cm) Nursery plate rack
Weeding by Weeder SRI Rotary Weeder Developed by DISIMP Consultant Conventional Weeder from Java Weeder ( for Muddy soil)
Rice Plant Growth (1) 10 DAT DAT = Day After Transplanting 21 DAT 41 DAT 62 DAT
SRI method can offer high paddy yield with less production costs
(seeds, fertilizers, chemcals) as well as water saving.
Labor burden increases by SRI, but farmers can overcome due
to strong incentive of high productivity of paddy cultivation.
Without use of organic fertilizers (reduced chemical fertilizer only)
high yield of paddy can be obtained. Use of organic fertilizers is
preferable but not the “Must” for SRI.
If use of organic fertilizers is the must, expansion of SRI is difficult.
SRI is water saving attaining about 40% reduction in quantity in lot
(variable by soil and filed conditions) due to intermittent irrigation.
However, farmers will never agree to dry up their field without
reliable water source . Therefore, introduction of SRI should be
in irrigation area of relatively good conditions such as upstream
of the system.
For successful introduction of SRI, involvement of local government
offices as well as experts (consultant) is necessary for technical
support and advice.
Intermittent Irrigation Wet Dry Wet-Dry Cycle is different by lot condition, soil type, and water availability. Dry for 3 weeks
Sambelia SRI Experimental Station, DISIMP Test Plot (5 m x 5 m, 24 plots) General Layout of Sambelia SRI Experimental Station Water Measurement System To Mataram (2 hours)
SRI Trial in Sambelia Station, DISIMP First Planting Test 2005/2006 Land Preparation (30-Sep-05) 3 DAT (14-Oct-05) 27 DAT (7-Nov-05) 43 DAT (23-Nov-05) 72 DAT (22-Dec-05) 115 DAT (4-Feb-06) DAT = Days After Transplanting
Field Test for Intermittent Irrigation Case-1: Case-2: Case-3: Case-4: SRI Transplanting (10-day seedling, 30cm x 30 cm, 1 each) + Intermittent Irrigation SRI Transplanting (10-day seedling, 30cm x 30 cm, 1 each) + Intermittent Irrigation Non-SRI Transplanting (25-day seedling, 20cm x 25 cm, 4 each) + Continuous Irrigation Non-SRI Transplanting (25-day seedling, 20cm x 25 cm, 4 each) + Intermittent Irrigation Field Test Test Results Case-1: Case-2: Case-3: Case-4: Total Irrigation Supply = 816 mm Total Irrigation Supply = 1,152 mm Total Irrigation Supply = 1,368 mm Total Irrigation Supply = 1,136 mm Paddy Yield = 5.12 t/ha Paddy Yield = 4.46 t/ha Paddy Yield = 2.95 t/ha Paddy Yield = 3.40 t/ha Case-1: Case-2: Case-3: Case-4: Rice Variety = Cihereng Irrigation stopped on 1-Jan-06 due to rainfall Irrigation Practice Oct. 2005 Nov. 2005 Dec. 2005 Jan. 2006 Feb. 2006 11 Oct. 11 Oct. 26 Oct. 26 Oct. 3 Feb. 4 Feb. 3 Feb. 4 Feb. Harvest Transplanting
Water Savings by SRI Methods Field water measurement using V-notch has started in DISIMP schemes in 2006.
Less water for 2 nd land preparation
Less water for nursery bed
Less irrigation during plant growing under intermittent irrigation
Water-Saving Effects of SRI Field observation shows an amount of irrigation water use for SRI is about 40% less than non-SRI (continuous ponding). Water-Saving Effects of SRI
Contribution to mitigate upsteam-downstream problem in
a scheme by introducing SRI in the upstream areas and increase
water for downsteam areas for equitable water diestribution.
=> Sustainable Participatory Water-saving
Cost saving for groundwater irrigation
Effective use of impounding water by dam and pond
Benefits of SRI Water-Saving
The End SRI will contribute to mitigate present and future global issues of Food , Poverty , Water , & Environment