Boosting Rice Nutrient Uptake and Grain Yield Through Co-Application of Natural Elicitor, Powder Compost, and NPK Under Greenhouse Conditions

Efficient fertilization strategies are essential for enhancing rice productivity while minimizing nutrient losses. This greenhouse study investigated the effects of co-applying a natural elicitor, powder compost, and NPK fertilizer on plant growth, nutrient uptake and grain yield of rice (Oryza sativa L.). A factorial experiment was conducted using a randomized block design with eight treatments. Parameters measured included plant growth, nitrogen (N), phosphorus (P), and potassium (K) uptake, as well as grain and straw weight per hill. Results showed that the combination of natural elicitor and NPK fertilizer, and natural elicitor, powder compost, and NPK fertilizer significantly increased plant growth and nutrient uptake. The highest grain yield was found on the combination of natural elicitor and NPK fertilizer compared to individual treatments. The highest NPK uptake increased by 71%, and grain yield improved by 47% compared to the control. Treatment involving NPK, powder compost and natural elicitor enhanced the fresh and dry weight of straw. These findings indicate that integrating organic, inorganic, and bio-stimulant inputs can synergistically boost nutrient efficiency and rice yield under controlled conditions. The approach holds promise for sustainable rice cultivation with reduced reliance on synthetic inputs.