Pengaruh Pupuk KNO3 dan Asam Amino Berbahan Ikan Lemuru Terhadap Pertumbuhan Bibit Tembakau (Nicotiana tabacum L.)

Fernando, Moch Ricko (2025) Pengaruh Pupuk KNO3 dan Asam Amino Berbahan Ikan Lemuru Terhadap Pertumbuhan Bibit Tembakau (Nicotiana tabacum L.). Undergraduate thesis, Politeknik Negeri Jember.

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Abstract

This study aimed to determine the effect of KNO3 fertilizer and lemuru fish-based amino acid on the seedling growth of tobacco plants (Nicotiana tabacum L.) of the H-382 variety. The research was conducted from May 2023 to June 2023 at the PTPN 1 Regional 4 plantation, Ajung Village, Ajung District, Jember. The study utilized a factorial Randomized Block Design (RBD) with two factors. The first factor was the potassium fertilizer dosage with three levels: K0 = no potassium fertilizer (control), K1 = 10 g potassium fertilizer/polybag, and K2 = 20 g potassium fertilizer/polybag. The second factor was the lemuru fish-based amino acid dosage with three levels: P0 = no lemuru fish-based amino acid (control), P1 = 5 ml/plant, and P2 = 10 ml/plant. Data obtained from the study were analyzed using ANOVA, followed by further testing with a 5% LSD. The results showed that potassium fertilizer had a highly significant effect on the growth of tobacco seedlings in the parameters of plant height and root length, with the best treatment being K2 (20 g/polybag). The study also revealed that lemuru fish-based amino acid significantly affected plant height, with the best treatment being P2 (10 ml/polybag). Moreover, amino acid significantly influenced stem diameter, with the best treatment being P1 (5 ml/polybag), and root length, with the best treatment being P2 (10 ml/polybag). Furthermore, an interaction was observed between potassium fertilizer and lemuru fish-based amino acid in affecting plant height and root length, with the best treatment being K2P2 (20 g potassium/polybag and 10 ml amino acid/polybag).

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