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All Journal Vegetalika Jurnal Pertanian Khairun (JPK)
Fadil Rohman
Jurusan Produksi Pertanian, Politeknik Negeri Jember
Agriculture, Biological Sciences & Forestry

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Pengaruh Dosis Pupuk NPK dan Zat Pengatur Tumbuh terhadap Kesuburan Tanah, Kadar Fenolik dan Perkembangan Bunga Krisan Pada Dataran Rendah Refa Firgiyanto; Fadil Rohman; Hanif Fatur Rohman; Leli Kurniasari; Adi Rastono; Ade Sumiahadi; Sinta Dwi Rahma; Mellya Dwi Citra Khysswari
Vegetalika Vol 14, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/veg.108934

Abstract

Chrysanthemums (Chrysanthemum spp.) are a floricultural commodity with high economic value and widespread demand as both cut flowers and ornamental plants. However, chrysanthemums generally grow optimally in highlands with cool temperatures, so their cultivation in lowlands faces various physiological constraints, such as decreased flower quality, delayed flowering, and impaired nutrient absorption.  This study aimed to evaluate the effects of different NPK fertilizer dosages and types of Plant Growth Regulators (PGRs) on soil nutrient availability (N, P, K), phenolic content, and flowering development of chrysanthemums cultivated in lowlands. The research was conducted in July–October 2024 at the greenhouse of the Jember State Polytechnic Plant Laboratory (±89 m above sea level) using a factorial Completely Randomized Design (CRD) with two factors: NPK 16-16-16 fertilizer dosage (N1 = 4 g/L, N2 = 5 g/L, N3 = 6 g/L) and PGR types (P1 = paclobutrazol, P2 = gaviota, P3 = BAP). The observed variables included soil NPK content, leaf phenolics, flower number, flower diameter, and chlorophyll. The results showed that PGR had a more dominant effect than fertilizer dosage. The N3P3 treatment produced the highest phenolic content (0.257%), while the N1P1 combination increased soil nitrogen accumulation (0.566%), and the N2P3 combination provided the highest phosphorus (0.338%) and potassium (0.190%). The NPK fertilizer dosage did not significantly affect all parameters, while PGR significantly affected the flowering time and flower number. No interaction was found between the two treatment factors.
Water Footprint Produksi Tanaman Melon pada Sistem Budidaya Hidroponik dan Konvensional Fadil Rohman; Tri Rini Kusparwanti; Refa Firgiyanto; Rindha Rentina Darah Pertami; Edi Siswadi; Muhammad Zayin Sukri; Hanif Fatur Rohman; Gallyndra Fatkhu Dinata; Eliyatiningsih Eliyatiningsih; Anggita Rizky Fadilah
Jurnal Pertanian Khairun Vol 4 No 2: (Desember 2025)
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jpk.v4i2.11169

Abstract

Water use efficiency is a critical issue in melon production, particularly under greenhouse cultivation systems. This study aimed to compare the water footprint of melon (Cucumis melo L.) production under hydroponic and conventional cultivation systems. The experiment was conducted at the Teaching Factory Smart Greenhouse, Politeknik Negeri Jember, from March to June 2023. Each cultivation system consisted of 30 sampled plants. Both systems applied drip irrigation with a nutrient solution concentration of 1400 ppm. Water footprint was calculated following Hoekstra’s method, considering only the blue water footprint, while green and grey components were assumed to be zero due to the protected greenhouse environment. The results showed that the conventional system produced greater vegetative growth, earlier generative phase development, and higher fruit diameter and weight than the hydroponic system. However, the water footprint of the conventional system was significantly higher. Differences in water footprint were mainly attributed to differences in planting area per plant, which affected plant water use calculated as evapotranspiration multiplied by planting area. The hydroponic system demonstrated higher water use efficiency per unit yield.
Co-Authors Ade Sumiahadi Adi Rastono Anggita Rizky Fadilah Eliyatiningsih, Eliyatiningsih Gallyndra Fatkhu Dinata Hanif Fatur Rohman Kurniasari, Leli Mellya Dwi Citra Khysswari Muhammad Zayin Sukri Refa Firgiyanto Rindha Rentina Darah Pertami Sinta Dwi Rahma Siswadi, Edi Tri Rini Kusparwanti