Growth and Yield Response of Rice (Oryza sativa L.) to Compound Copper and Zinc Micronutrient Fertilization
DOI:
10.29303/jbt.v26i1.11147Published:
2026-01-16Downloads
Abstract
This study evaluated a Zn–Cu compound micronutrient fertilizer on plant growth, yield components, grain yield, and fertilizer-use efficiency of Inpari 32 rice. A field experiment was conducted in an Inceptisol paddy field (1,100 m²) in Margokaton, Seyegan, Sleman, Yogyakarta, Indonesia (January–April 2025). Treatments were arranged in a non-factorial completely randomized design with eight fertilizer regimes and four replications, combining NPK with graded rates of Zn+Cu fertilizer. Pre- and post-planting soil nutrient analyses and post-harvest leaf tissue nutrient analyses were conducted, and vegetative traits, yield, Relative Agronomic Effectiveness (RAE), and fertilizer-use efficiency were evaluated. Soil Zn and Cu were initially very high and high, respectively, but remained below toxicity thresholds. Compared with regimes without Zn+Cu, Zn+Cu additions significantly increased plant height, tiller number, and milled dry grain yield. Treatments P2–P7 achieved RAE >100%, indicating greater agronomic effectiveness than the non-Zn+Cu regimes. The most effective dosage was P6 (1 dosage NPK + 1.5 dosage Zn+Cu).
Keywords:
Copper Micronutrient fertilizer Relative agronomic effectiveness Rice (Oryza sativa L.) ZincReferences
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