Morfo-fisiologi Bibit Kakao (Theobroma cacao L.) pada Aplikasi Beberapa Jenis Pupuk Nitrogen

Authors

  • Danie Indra Yama Politeknik Negeri Pontianak
  • Tika Rahma Yunita Politeknik Negeri Pontianak
  • Zaenal Mutaqin Politeknik Negeri Pontianak
  • Alfiah Alfiah Politeknik Negeri Pontianak

DOI:

https://doi.org/10.25181/jaip.v13i3.4165

Keywords:

dosage, fertilizer, plant, response

Abstract

The nursery is the initial phase that determines success in the subsequent phases. The constraints in the nursery phase are less than optimal growth because nutrients in the soil are less available, one of which is nitrogen. As a result, physiological activity to support growth is also less than optimal. This study aims to determine the effect of different nitrogen fertilizers on the physiological response of cocoa (Theobroma cacao L.) seedlings and to identify the optimal nitrogen fertilizer dosage for achieving the best physiological response in these seedlings. The research employed a Randomized Block Design (RBD) with 10 treatment levels of nitrogen fertilizers, differing in dosage and type: control (N0), urea 1.50 g.polybag-1(N1), urea 3 g.polybag-1 (N2), urea 4.50 g.polybag-1 (N3), ZA 3.29 g.polybag-1 (N4), ZA 6.57 g.polybag-1 (N5), ZA 9.86 g.polybag-1 (N6), calcium nitrate 4.60 g.polybag-1 (N7), calcium nitrate 9.20 g.polybag-1 (N8), and calcium nitrate 13.80 g.polybag-1 (N9). Data were analyzed using Analysis of Variance (ANOVA) with further testing using Duncan's Multiple Range Test (DMRT) at a 5% significance level. The results indicated that the type of fertilizer did not significantly affect leaf color, chlorophyll content, leaf-to-root ratio, or the timing of flush emergence. However, nitrogen fertilizer application significantly influenced the stomatal density in cocoa seedlings, with the ZA 9.86 g.polybag-1 dosage resulting in a stomatal density of 422.93 mm-2.

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Published

2025-11-07

How to Cite

Yama, D. I., Yunita, T. R., Mutaqin, Z., & Alfiah, A. (2025). Morfo-fisiologi Bibit Kakao (Theobroma cacao L.) pada Aplikasi Beberapa Jenis Pupuk Nitrogen. Jurnal Agro Industri Perkebunan, 13(3), 183–194. https://doi.org/10.25181/jaip.v13i3.4165

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Vol. 13 No. 3 (2025): November

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Article

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Copyright (c) 2025 Danie Indra Yama, Tika Rahma Yunita, Zaenal Mutaqin, Alfiah Alfiah

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