Efficacy test of growth promotants on the yield of hybrid rice in Kalinga [Philippines]
2009
Saguibo, J.E. | Miguel, E.T., Kalinga Apayao State Coll., Tabuk City, Kalinga (Philippines)
The efficacy of growth promotants (Brasinollide, Planergy, GA3, Muriate of Potash, Crop Giant) on the yield of hybrid rice during the 2008 wet season in Taniok, Tabuk, Kalinga was assessed. Specifically, the study validated the efficacy of commercially distributed growth promotants and evaluated their effect on the yield of hybrid rice (M7 variety). It used the Randomized Complete Block Design with three replications in an area of 520 sq m. Results showed no significant differences among the parameters height, panicle number, filled and unfilled grains, and weight of the grains. However, differences between replications were noted, but these were attributed to other related factors and not on the growth promotants. The variation in the height of the plants, number of panicles, number of filled and unfilled grains, weight of the grains, and yield did not transform the effect of promotants into a significant results. Further analysis showed that the use of growth promotants could have inititated the occurence of insect pests particularly rodents due to the effects on the physiology and morphology of the rice plants. Based on the results of the study, growth promotants are not necessary when planting the M7 variety. Growth promotants should be applied earlier, but further studies should be conducted to validate their effects.
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