Wahyu Tri Wibowo, Paiman

Pengaruh Dosis Pupuk Urea Terhadap Pertumbuhan dan Hasil Padi Pada Sistem Salibu

Introduction

Pengaruh dosis pupuk urea terhadap pertumbuhan dan hasil padi pada sistem salibu. Pelajari pengaruh dosis pupuk Urea terhadap pertumbuhan & hasil padi Salibu (Inpari 42). Temukan dosis optimal untuk meningkatkan bobot gabah kering & 1000 butir gabah.

Abstract

This study aimed to determine the effect of urea fertilizer dosage on the growth and yield of Salibu rice using the Inpari 42 Agritan GSR variety. The experiment was conducted in a paddy field arranged in a completely randomized design (CRD) with a single factor consisting of four levels of urea fertilizer dosage: control, 7.5 g/clump, 15 g/clump, and 22.5 g/clump, each replicated three times. Observed parameters included plant height, number of tillers, panicle length, total dry weight, total dry grain weight, 1,000 filled grain weight, and shoot dry weight. The results showed that the application of 15 g/clump of urea was the optimal treatment for increasing total dry grain weight and the weight of 1,000 filled grains. Meanwhile, a dosage of 22.5 g/clump resulted in the highest average shoot dry weight. Quadratic regression analysis indicated an optimal dosage of 22.04 g/clump for total dry grain weight and 13.80 g/clump for the weight of 1,000 filled grains. It is recommended that further studies focus on testing urea fertilizer dosages within the predictive optimum range to validate the quadratic regression model under various agroecological conditions.

Review

This study rigorously investigates the critical aspect of urea fertilizer optimization for rice cultivation under the Salibu system, employing the Inpari 42 Agritan GSR variety. The research clearly states its objective to quantify the impact of varying urea dosages on key growth and yield parameters. Utilizing a completely randomized design with a single factor across four distinct urea levels (control, 7.5, 15, and 22.5 g/clump), replicated thrice, the experimental setup appears sound and appropriate for addressing the research question. The selection of the Salibu system, a sustainable practice, and a modern rice variety adds significant practical relevance to the findings, aiming to improve agricultural efficiency and productivity. The findings presented are insightful and offer valuable practical guidance. Notably, the application of 15 g/clump of urea emerged as the most effective dosage for maximizing total dry grain weight and the weight of 1,000 filled grains, indicating a clear sweet spot for yield components. While a higher dosage of 22.5 g/clump showed the greatest average shoot dry weight, this suggests a potential divergence between vegetative growth and final grain yield, which is an important consideration for farmers. The subsequent quadratic regression analysis further refines these practical observations, proposing optimal dosages of 22.04 g/clump for total dry grain weight and 13.80 g/clump for 1,000 filled grain weight. These results provide a strong empirical basis for developing more precise fertilizer recommendations. The study's strength lies in its systematic approach and the use of quantitative analysis to derive optimal fertilizer dosages. However, as acknowledged by the authors, the regression models require validation. The recommendation for further studies to test urea dosages within the predicted optimum range and across diverse agroecological conditions is highly pertinent. This would significantly enhance the generalizability and robustness of the findings, ensuring their applicability beyond the specific experimental site and conditions. Overall, this research makes a valuable contribution to understanding nutrient management in Salibu rice systems and lays a solid foundation for future, more comprehensive investigations into site-specific fertilizer recommendations.

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