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EXOGENOUS APPLICATION OF CALCIUM, Α-NAPHTHALENEACETIC ACID AND 1-METHYLCYCLOPROPENE IMPROVED FRUIT GROWTH AND OIL YIELD OF OIL PALM (ELAEIS GUINEENSIS JACQ.) GROWN ON ULTISO
Soil acidity is one of the main factors limiting the growth andsustainable production of oil palm in Indonesia. The aim of this studywas to evaluate the effect of various exogenous compounds onimproving fruit growth and oil yield of palm oil grown on Ultisol. Theexperiment employed three treatments which were arranged in aRandomized Complete Block Design (RCBD) with three replications.The treatments were: 1-MCP (0, 100, 200, and 300 ppm), CaCl 2 (0and 50 ppm) and NAA (0 and 200 ppm). Application of Ca 2+, NAA and1-MCP either single or in combination improved fruit growth and oilyield by increasing almost all variables, except the number of bunches,bunch weight and fruit set. The 100 ppm 1-MCP + 50 ppm Ca 2+ +200 ppm NAA treatments showed the highest oil-to-dry mesocarpcontent. To get the highest oil to bunch (OB), the combination of 100ppm 1-MCP + 200 ppm NAA; 50 ppm Ca2+ + 200 ppm NAA, and asingle treatment of 50 ppm Ca2+ were very promising to be utilized.
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