Ratooning response of the different lowland rice (Oryza sativa L.) varieties during the dry season under VSU [Visayas State University] conditions
2018
Ruales, D.M. | Bañoc, D.M.
This study was conducted under irrigated lowland conditions which aimed to determine the growth and yield performance of different lowland rice varieties to ratooning; to identify varieties that perform better with apparently high ratoon yield and to determine the profitability of ratooning using different lowland rice varieties during the dry season under VSU conditions. The area was laid out in a Randomized Complete Block Design (RCBD) with three replications. The treatments were designated as follows: T sub 1-PSB Rc18, T sub 2-PSB Rc82, T sub 3-NSIC Rc128, T sub 4-NSIC Rc160, T sub 5-NSIC Rc212, T sub 6-NSIC Rc214, T sub 7-NSIC Rc216, T sub 8-NSIC Rc218, T sub 9-NSIC Rc222, T sub 10- NSIC Rc226, T sub 11-NSIC Rc290, T sub 12-NSIC Rc292, T sub 13-NSIC Rc298, T sub 14-NSIC Rc300, T sub 15-NSIC Rc370, T sub 16-NSIC Rc302, T sub 17-NSIC Rc344, T sub 18-NSIC Rc352. The agronomic characteristics of the different lowland rice varieties that were significantly affected by ratooning were the number of days from harvesting of the main crop to heading and maturity, plant height (cm), leaf area index (LAI) and fresh straw yield (t/ha). The yield and yield components such as number of productive tillers/hill, percent unfilled grains, panicle length (cm), panicle weight (g), weight of 1,000 grains (g) and grain yield were significantly affected by the treatments tested. The highest net income of PhP 14,889.50 was obtained in NSIC Rc212 which was indicated with the highest grain yield of 1.76 t/ha. Then, the different lowland rice varieties namely; NSIC Rc212, 222, 214, 216 and 300 significantly attained the highest percentage of regrowth and apparently these varieties also gave a profitable investment when ratooned during the dry season under VSU conditions.
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