Overview of System of Rice Intensification in Cambodia Chou Cheythyrith National FAO-IPM Project Coordinator, Ministry of Agriculture Forestry and Fisheries, in collaboration with Regional FAO Vegetable IPM Program. Background of SRI.
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Overview of System of Rice Intensification in Cambodia
National FAO-IPM Project Coordinator, Ministry of Agriculture Forestry and Fisheries, in collaboration with Regional FAO Vegetable IPM Program
According to their natural potential, rice plants have ability for:
Traditional/conventional practices inhibit crop growth and do not allow rice plants to achieve their full potential, while SRI methods create a conducive environment for rice plants to grow
Rice field is continuously flooded with high level of water during the vegetative stage
Seedlings are raised with much water, and seedling density is high
Transplanting with too many seedlings per clump, mixture of weak and thick seedlings
Only minimal water, preferably keeping the soil only moist and in dry/wet condition
Seedlings are raised in beds like vegetable bed, and the seed density is very low
Young seedlings are used, preferably less than 15 days old (at 2-3 leaf stage)
Seedling age is too old, generally more than one month
Seedling is uprooted with damage to root and stem, and is kept for one to two days before transplanting
Seedlings are transplanted with close spacing and no equal spacing
Only 1 to 2 seedlings, but preferably one seedling per clump, only vigorous seedlings
Young seedling is uprooted and transplanted with care, transplanted immediately after uprooting
Wide spacing and square pattern, or at least line transplanting
Weeding is not early enough, not frequent and regular
Limited Use of farmyard manure, and dependence on use of chemical fertilizers
Early weeding and frequent weeding to improve soil aeration
Application of compost as much as possible
For SRI, the best result or the optimal yield is achieved only through the proper combination of the improved practices that create a synergy effect. The more good practices that farmers can apply, the more yield they will get.
To begin, if farmers just select only strong seedlings for transplanting, reduce the number of seedlings per clump, and do shallow transplanting, their yield can be increased by more than 30 % (at no extra cost !).
Highlights of the results in the wet season 2006:
Supported by Regional FAO Vegetable IPM Program
Three water regimes
Three planting densities
Criteria for healthy root growth:
Trendunder different water regimes and planting densities:
Grain yield (t/ha)
for your attention