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All Journal Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Journal of Tropical Crop Science
Umadi, Sarah Sakinah
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Agriculture, Biological Sciences & Forestry Environmental Science

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Growth Response of Bambara Groundnut to the Application of Rhizobium sp. and Pseudomonas sp. in Matriconditioning and Nitrogen-Phosphate Fertilization Umadi, Sarah Sakinah; Ilyas, Satriyas; Widyastuti, Rahayu
Journal of Tropical Crop Science Vol. 12 No. 01 (2025): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.12.01.37-46

Abstract

Bambara groundnut has the potential to be an alternative food source of protein and carbohydrates. However, the quality of the seeds is not guaranteed, which can affect plant growth. The experiment aimed to determine the growth response of Bambara groundnut to the application of nitrogen fixation bacteria (Rhizobium sp.) and phosphate solubilizing bacteria (Pseudomonas sp.) integrated into matriconditioning and nitrogen-phosphate (NP) fertilizer. The experiment was conducted in Situraja-District, Sumedang Regency, West Java, Indonesia from November 2020 to April 2021. The experiment was arranged in a split-plot randomized complete block design replicated three times. The main plot was NP fertilizer level (0, 50, and 100% of recommended dose), and the sub-plot was seed invigoration (untreated, matriconditioning + Rhizobium KPB2 + Pseudomonas BPF9, and matriconditioning + Rhizobium KPB5 + Pseudomonas BPF9). Corncob biochar was used as the carrier in matriconditioning. The seed invigoration treatments using matriconditioning + Pseudomonas BPF9 + Rhizobium either KPB2 or KPB5 isolate significantly improved the plant growth (field emergence, plant height, leaf number, canopy diameter, and leaf chlorophyll content). Furthermore, when these invigoration treatments were accompanied by chicken manure 2 t.ha-1 significantly increased the leaf number without adding NP fertilizer.
Karakterisasi dan Viabilitas Bakteri Penambat Nitrogen dan Bakteri Pelarut Fosfat dalam Media Pembawa Biochar Ilyas, Satriyas; Widyastuti, Rahayu; Umadi, Sarah Sakinah
Jurnal Ilmu Tanah dan Lingkungan Vol 25 No 2 (2023): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.25.2.40-45

Abstract

A consortium of nitrogen-fixing bacteria and phosphate solubilizers serves as biological fertilizers to increase the availability of plant nutrients such as nitrogen (N) and phosphorus (P). The experiment aims to study the character of nitrogen-fixing bacteria and phosphate solubilizing bacteria and compare their viability on the biochar (made from husk charcoal and corn cobs) as the carrier media. The experiment involved several tests, such as pathogenicity, nitrogen-fixing ability, phosphate solubilization ability on solid Pikovskaya media, compatibility, and viability. The results showed that KPB4 isolates were pathogenic to animals or humans. Nitrogen-fixing bacteria isolates, namely KBP1, KBP2, and KBP5, had N solubility (ppm) of 54.86, 77.79, and 76.28, respectively, and had NH3 concentrations (mg/L) of 66.61, 94.46, and 92.63, respectively. BPF9 (phosphate solubilizing bacteria isolate) had a phosphate solubilization index of 1.14. Each isolate of nitrogen-fixing bacteria was compatible with BPF9. The results showed that KBP2 and KBP5 each consorted with BPF9 on corncob biochar carriers had higher bacteria populations (15.50 x 107 CFU/g) after four weeks of storage. Keywords: nitrogen-fixing, phosphate solvent, consortium bacteria, biochar
Co-Authors Daniel Happy Putra RAHAYU WIDYASTUTI SATRIYAS ILYAS