YIELD AND GRAIN QUALITY OF HYBRID AND INBRED LOWLAND RICE (Oryza sativa L.) AS INFLUENCED BY COMBINED APPLICATION OF INORGANIC AND ORGANIC FERTILIZERS SUPPLEMENTED WITH CARABAO MANURE TEA

The combined application of fertilizers may provide essential nutrients needed by plants. This study aimed to determine the effects of the combined application of inorganic and organic fertilizers supplemented with carabao manure tea (CMT) on the growth, yield and interaction effects between hybrid and inbred of lowland rice types and fertilizer applications. A split plot-RCBD was used, with rice type (M₁- hybrid, M₂- Inbred) as the mainplot, and fertilizers (T0- No Fertilizer Application, T1- 120-90-60kg ha^-1 N-P₂O₅-K₂O, T2- 60-30-30 kg ha^-1 N-P₂O₅-K₂O + 5 tons ha^-1 rice straw mixed with CRH + CMT, T3- 60-30-30 kg ha^-1 N-P₂O₅-K₂O + 5 tons ha^-1 Carabao Manure + CMT, T4- 60-30-30 kg ha^-1 N-P₂O₅-K₂O + 5 tons ha^-1 VermiCompost+ CMT, T5- 60-30-30 kg ha^-1 N-P₂O₅-K₂O + 5 tons ha^-1 Chicken Dung + CMT, and T6- 2.5 tons ha^-1 Rice Straw-CRH Compost + 2.5 tons ha^-1 Carabao Manure + 2.5 tons ha^-1 Vermi Compost + 2.5 tons ha^-1 Chicken Dung + CMT) as the subplots. Results showed that the hybrid and inbred lowland rice types resulted indelayed heading and maturity and longer plant height, producing more productive tillers and spikelets when applied with a fertilizer combination of 60-30-30 kg ha^-1 N-P₂O₅-K₂O + 5 tons ha^-1 Chicken Dung + CMT. An optimum yield of hybrid and inbred rice can be obtained with the application of 50% RR inorganic combined with any of the organic fertilizers at a rate of 60-30-30 kg ha^-1 N-P₂O₅-K₂O + 5 tons ha^-1 supplemented with manure tea. The sole application of inorganic fertilizer and 50% RR combined with 5 tons ha^-1 Chicken Dung supplemented with CMT produces greater plant height in hybrid rice, while inbred rice significantly responded to sole applications of inorganic fertilizers and 50% RR combined with any of the organic fertilizers at 5 tons ha^-1 supplemented with CMT.