Gregorius Hadi Sumartono
Jenderal Soedirman University

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AKLIMATISASI ANGGREK (PHALAEPNOPSIS AMABILIS) DENGAN MEDIA TANAM YANG BERBEDA DAN PEMBERIAN PUPUK DAUN Wukir Tini, Etik; Sulistyanto, Prasmaji; Sumartono, Gregorius Hadi
Jurnal Hortikultura Indonesia Vol. 10 No. 2 (2019): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.236 KB) | DOI: 10.29244/jhi.10.2.119-127

Abstract

Penelitian bertujuan mendapatkan media tanam dan konsentrasi pupuk daun yang paling tepat untuk aklimatisasi anggrek Phalaepnopsis agar meningkatkan pertumbuhan tanaman. Penelitian dilaksanakan November 2017 sampai Juni 2018 di rumah kasa. Rancangan percobaan yang digunakan Rancangan Kelompok Lengkap Teracak dengan dua factor perlakuan, faktor pertama adalah media tanam (pakis, sabut kelapa, dan akar kadaka), dan faktor yang kedua adalah konsentrasi pupuk daun ( tanpa diberi pupuk daun, pupuk daun dengan konsentrasi 1 g L-1, 2 g L-1, 3 g L-1). Hasil penelitian menunjukkan bahwa akar kadaka dapat meningkatkan pertambahan luas daun sebesar 19.2% dibandingkan pakis dan 26.67% dibandingkan sabut kelapa. Konsentrasi pupuk daun Greener 2 g L-1 merupakan konsentrasi paling baik yang dapat meningkatkan pertambahan luas daun sebesar 78.31% dan pertambahan jumlah klorofil 25.58%. Kombinasi jenis media tanam dan konsentrasi pupuk belum meningkatkan pertumbuhan tanaman anggrek Phalaenopsis pada fase aklimatisasi. Kata kunci: akar kadaka, konsentrasi, pakis, pertumbuhan tanaman, sabut kelapa
Effect of Potassium Level on Quality traits of Indonesian Potato Tubers Wibowo, Condro; Wijaya, Krissandi; Sumartono, Gregorius Hadi; Pawelzik, Elke
Asia Pacific Journal of Sustainable Agriculture, Food and Energy Vol 2, No 1 (2014): Agriculture Food and Energy for Future
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy Network (SAFE Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.137 KB)

Abstract

The rate of K2O can affect yield and process-grade tubers of potato (Solanum tuberosum L.). The Indonesian cultivars Tenggo and Krespo were examined for effects of K2O level on selected quality traits. Both new cultivars are intended for processing purposes. The result showed that dry matter, K, Mg and Mn contents were not affected by K2O supply. Citric acid content of cultivar Tenggo increased up to 2.64 mg 100 g-1 Dry Matter due to application of 100 kg ha-1 K2O , whereas ascorbic and chlorogenic acid contents were not affected by K2O level. Malic and fumaric acid in cultivar Krespo, and tartaric and fumaric acids in cultivar Tenggo increased due to application of 100 kg ha-1 of K2O. Regarding the oxidative potential no differences between the cultivars were found.