Agronomic performance of NSIC-released rice varieties seeded at varying rates in rainfed lowlands
2011
Gutierrez, B.A., Capiz State Univ., Mambusao, 5708, Capiz (Philippines). Research Inst., Research, Development and Extension Center | Gregorio, G.L., Capiz State Univ., Mambusao, 5708, Capiz (Philippines)
In farming operations, resource-poor farmers are perennially left to determine what particular rice varieties and seeding rates to consider for better yield. In a two factorial RCBD experiment completed at Burias, Mambusao, Capiz, agronomic indicators and ranking methods were used to examine the performance of NSIC-released lowland rice varieties (NSIC Rc 118, 120, 142, 144, 152, 154, 160 and PSB Rc 10), assess the effects of the seeding rates (40 and 80 kg/ha) and select the best recommendation for rainfed lowlands in 2009-2010 DS planting. The agronomic data were analyzed with ANOVA using F-test, while mean comparisons were done using DMRT, LSD and SED. Selection of the best variety and seeding rate were based on ranking model using regression coefficient. Results showed that the lowland rice varieties varied in their growth and yield characters. Except for plant height and biomass weight, plant density and yield components were generally influenced by the seeding rate. The study observed significant interaction between the lowland rice varieties and seeding rates based on the number of productive tillers, tillering efficiency and number of grains per panicle. Similarly, the high number of productive panicles per sq m, the number of grains per panicle and the 1000-grain weight and their combinations were associated with the high grain yield of NSIC Rc 142. Results generated can help farmers to choose the best rice variety and right quantity of seeds for adoption.
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