Performance of lowland rice (Oryza sativa L.) NSIC Rc82 to different nutrient management strategies grown as a main crop and ratoon
2018
Bañoc, D.M. | Sevillano, R. | Libre, M.J.P. | Asio, V.B.
This study was conducted under lowland ecosystem aimed to evaluate the growth and yield performance of lowland rice NSIC Rc82 as influenced by nutrient management strategies grown as a main and ratoon crop; to determine an appropriate nutrient option that promotes better growth and yield performance of lowland rice; and assess the benefit of lowland rice production when grown as a main and ratoon crop to nutrient management strategies adopted. Fertilized plants grown either as main crop or ratoon significantly matured earlier than that of unfertilized control. Fertilized main crop exhibited significant protrusion of the flagleaf, produced markedly abundant number and longer nodal roots access length. For the ratoon crop, however, all agronomic characteristics were not significantly affected by the nutrient management options evaluated except the entire growth period of the ratoon and total number of nodal roots per hill. Relative to yield, yield component and harvest index (HI), all parameters were not significantly affected by the nutrient management strategies tested except the number of productive tillers and the weight of 1,000 grains. Main crop applied with inorganic fertilizers at 90-60-60 kg/ha N sub 1 P sub 2 O sub 3 K sub 2o (T sub 1) generated the highest net income of PhP 28,596.00. per hectare. For the ratoon crop, combined application of organic and inorganic fertilizers generated the highest net income of PhP 19,600.50. However, for combined cost and return analysis of both the main crop and ratoon, inorganic fertilized plants (T sub 1) generated the highest net income of PhP 43,678.00 while lowest net income was obtained in purely organic fertilized plants with PhP 5,931.25
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