Increasing sri-organic rice yields through double rows planting pattern and using location and season adapted rice cultivar
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Abstract
The field trial were conducted at Maitim, Bay Laguna, Philippines during the dry season of Crop year 2014 to answer these questions .Test plots were laid out in randomized complete block design (RCBD) and replicated 3 times . Of the 3 planting patterns, highest grain yield was obtained in the double row at 8.4 t ha-1. This high yield was due to high panicles per ha (3.49 million), percent filled (%) grains per panicle ( 93.6% )and weight of 1000 grains (22.3 grams while only 21.1 gm and 21.4 gm for the single row and 20cm x 20cm spacing, respectively).When compared with the yield of conventionally established and managed , the yield was only 4.49 t ha-1 (1.87 times higher in SRI-double row ) . The proportion of unfilled grain was high at 17% in conventional rice cultivation but only 7.7% in the organic SRI-double row. For the 20 cultivars , highest grain yields was obtained among the inbreds (Milyang 23 at 7.49 t ha-1, PSB RC 240 at 6.99 t ha-1, PSB RC 222 at 6.81 t ha-1).Of the 3 hybrids, NSICRc 202H yielded the highest at 6.78 t ha-1. The farmer-bred cultivar Masipag 10-1 yielded 6.38 t ha-1 . The yield differences are not statistically significant. A 0.5 t ha-1 difference may not be significant statistically but this amount to PhP10,000(227 USD ,1USD=PhP44).
SRi-Organic rice yields of up to 8.5 t ha-1 had been realized during the dry season - January to April cropping of 2014 in double row planting pattern using the locally adapted rice cultivar PSB Rc 18. This showed the prospects of increasing rice yield using low cost method and locally available materials. Adopting organic method of rice farming is also climate change adaptive , oil energy bill and carbon emission reducing .
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