Adaptability trial of lowland rice varieties under Abra conditions [Philippines]
2010
Edwin, A.B. Jr., Abra State Inst. of Sciences and Technology, Lagangilang, Abra (Philippines)
The study was conducted for two growing season at the Research Experimental Area on rice, at the Abra State Institute of Sciences and Technology, Lagangilang, Abra to determine the adaptability and yield performance of six lowland rice varieties selected. Result of the study revealed that there were significant differences in the height of seedlings at transplanting and at maturity, number of grains per panicle, number of filled grains, number of unfilled grains, length of panicle, harvest index, weight of 1000 seeds and yield per hectare of the different lowland varieties. Results of the study indicates that the varieties tested showed highly significant differences in the parameters studied except in percentage survival and production of tillers. PSB Rc18 outranked the other varieties in yield probably because it had produced the highest number of tillers per hill, grains (filled and unfilled) per panicle, high harvest index and yield per hectare of 5.2 tons. PSB Rc82 were the tallest at transplanting time hence were the tallest at maturity, had high percentage survival and the longest panicle. NSIC Rc112 produced the highest number of productive tillers and the heaviest weight of 1000 seeds. PSB Rc28 produced the least yield because of low production of tillers, number of grains produced, low harvest index and short panicles. The yield of all the varieties exceeded the average national production of lowland rice, which is 3.4 t/ha (Agriculture Magazine, 2000). PSB Rc18, 82, NSIC 110 and 112 and IR64 could be grown by rice farmers in lowland condition in Abra because they exceeded the average national yield and found acceptable by consumers.
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