Pendekatan Polinomial Ortogonal dalam Menentukan Dosis Optimum NPK Grower pada Tanaman Sawi

https://doi.org/10.47637/agrimals.v6i1.2363
Published: May 18, 2026

Abstract:

Analysis of variance (ANOVA) is a basic statistical method used to determine whether or not treatments have an effect on the observed response variables. Orthogonal polynomial analysis is a follow up test that functions to break down response trends into linear, quadratic, or higher order components. This study aimed to determine the analysis of variance and orthogonal polynomial analysis on the growth response of mustard greens (Brassica juncea) under various doses of NPK Grower fertilizer. The study was conducted using a Randomized Block Design (RBD) with 5 treatment levels G0 = Control (without NPK Grower), consist of G1 = 1 g/polybag, G2 = 2 g/polybag, G3 = 3 g/polybag, G4 = 4 g/polybag. The results of the follow up analysis using orthogonal polynomials showed that most plant growth responses followed a quadratic pattern, particularly in the variables of plant height, number of leaves, stem diameter, and fresh plant weight. This indicates the presence of an optimum dose capable of producing maximum growth. The optimum dose of NPK Grower fertilizer ranged from approximately 3.14 to 3.42 g/polybag, with an average value of around 3.2–3.3 g/polybag producing maximum growth results. In the root length variable, the response pattern was linear, meaning that increasing fertilizer doses continued to enhance root growth without reaching an optimum point within the tested dose range. The combination of analysis of variance and orthogonal polynomial analysis was able to provide more comprehensive information regarding the effect of NPK Grower.

Authors:
1 . Rita Rida Simamora
a:1:{s:5:"en_US";s:29:"Universitas Satu Nusa Lampung";}
2 . Olivia Cindowarni
Universitas Satu Nusa Lampung
3 . Nyuzza Fajar Annaba
Universitas Satu Nusa Lampung
4 . Usman Rizal
Universitas Satu Nusa Lampung
5 . Firza Afrina
Universitas Satu Nusa Lampung
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How to Cite
Simamora, R. R., Cindowarni, O., Annaba, N. F., Rizal, U., & Afrina, F. (2026). Pendekatan Polinomial Ortogonal dalam Menentukan Dosis Optimum NPK Grower pada Tanaman Sawi . Journal of Agriculture and Animal Science, 6(1), 35–44. https://doi.org/10.47637/agrimals.v6i1.2363
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Issue & Section
Vol. 6 No. 1 (2026): Volume 6 Nomor 1 Tahun 2026
Articles
References

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    Ibrahim, N., & Abdullahi, A. B. (2023). Analysis of Variance (ANOVA) Randomized Block Design (RBD) to Test the Variability of Three Different Types of Fertilizers (NPK, UREA and SSP) on Millet Production. African Journal of Agricultural Science and Food Research, 9(1), 1-10.

    Novrimansyah, E. A., Ilmiasari, Y., Ayuningtyas Harini, N. V., & Sunaryo, W. A. (2025). Pengaruh Pemberian NaCl Terhadap Produksi Caisim (Brassica juncea L.) di Tulang Bawang Barat. Journal of Agriculture and Animal Science, 5(2), 221-227. https://doi.org/10.47637/agrimals.v5i2.1928

    Nurmalasari, A. I., Supriyono., Linda, F., & Sukaya. (2024). Analysis of sweet corn growth and yield with the use of organic cow manure fertilizer. Ilmu Pertanian (Agricultural Science), 9 (3), 173-180. https://doi.org/10.22146/ipas.94315

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    Sari, D. S., Palupi, T., & Hadijah, S. (2022). Respon Kombinasi Abu Sabut Kelapa dan Pupuk NPK terhadap Pertumbuhan dan Hasil Kubis Bunga pada Tanah Podsolik Merah Kuning. Jurnal Agrotek Tropika, 10(3), 355–362. https://doi.org/10.23960/jat.v10i3.5612

    Singh, S. P., Mahapatra, B. S., Pramanick, B., & Yadav, V. R. (2021). Effect of irrigation levels, planting methods and mulching on nutrient uptake, yield, quality, water and fertilizer productivity of field mustard (Brassica rapa L.) under sandy loam soil. Agricultural Water Management, 244(106539). https://doi.org/10.1016/j.agwat.2020.106539

  1. Airlangga, T. A., & Parapasan, Y. (2023). Pengaruh Komposisi Media Tumbuh dan Dosis Pupuk Majemuk terhadap Pertumbuhan Bibit Kakao. Journal of Agriculture and Animal Science, 3(2), 90–99. https://doi.org/10.47637/agrimals.v3i2.912
  2. Damayanti, E. V., Nugroho, S., & Faisal, F. (2009). Penentuan Koefisien Ortogonal Polinomial pada Taraf Perlakuan Berjarak Tak Sama. e-Jurnal Statistika.
  3. Fadila, A. N., Rugayah, R., Widagdo, S., & Hendarto, K. (2021). Pengaruh Dosis Pupuk NPK terhadap Pertumbuhan dan Hasil Tanaman Kailan (Brassica oleracea var. alboglabra) pada Pertanaman Kedua. Jurnal Agrotek Tropika, 9(3), 473–480. https://doi.org/10.23960/jat.v9i3.5304
  4. Ibrahim, N., & Abdullahi, A. B. (2023). Analysis of Variance (ANOVA) Randomized Block Design (RBD) to Test the Variability of Three Different Types of Fertilizers (NPK, UREA and SSP) on Millet Production. African Journal of Agricultural Science and Food Research, 9(1), 1-10.
  5. Novrimansyah, E. A., Ilmiasari, Y., Ayuningtyas Harini, N. V., & Sunaryo, W. A. (2025). Pengaruh Pemberian NaCl Terhadap Produksi Caisim (Brassica juncea L.) di Tulang Bawang Barat. Journal of Agriculture and Animal Science, 5(2), 221-227. https://doi.org/10.47637/agrimals.v5i2.1928
  6. Nurmalasari, A. I., Supriyono., Linda, F., & Sukaya. (2024). Analysis of sweet corn growth and yield with the use of organic cow manure fertilizer. Ilmu Pertanian (Agricultural Science), 9 (3), 173-180. https://doi.org/10.22146/ipas.94315
  7. Riar, A., Gill, G., & McDonald, G. (2020). Different Post-Sowing Nitrogen Management Approaches Required to Improve Nitrogen and Water Use Efficiency of Canola and Mustard. Front. Plant Sci. 11(1111), 1-15. doi: 10.3389/fpls.2020.01111
  8. Rusdiana, R. Y., & Fariroh, I. (2022). Penerapan ANOVA Dengan Respon Data Count Pada Kasus Perkecambahan Serbuk Sari Jagung. JAGO TOLIS : Jurnal Agrokompleks Tolis, 5(1), 51-58. https://doi.org/10.56630/jago.v5i1.712
  9. Sari, D. S., Palupi, T., & Hadijah, S. (2022). Respon Kombinasi Abu Sabut Kelapa dan Pupuk NPK terhadap Pertumbuhan dan Hasil Kubis Bunga pada Tanah Podsolik Merah Kuning. Jurnal Agrotek Tropika, 10(3), 355–362. https://doi.org/10.23960/jat.v10i3.5612
  10. Singh, S. P., Mahapatra, B. S., Pramanick, B., & Yadav, V. R. (2021). Effect of irrigation levels, planting methods and mulching on nutrient uptake, yield, quality, water and fertilizer productivity of field mustard (Brassica rapa L.) under sandy loam soil. Agricultural Water Management, 244(106539). https://doi.org/10.1016/j.agwat.2020.106539