The Effect of Rock Phosphate and Level of Inoculums on The Survivability of Aspergillus niger and Its Solubilization Ability When Pelleted With Rock Phosphate

  • Yudi Sastro
  • Donny Widianto
  • Irfan D Prijambada

Abstract

The study is intended to examine the survival of Aspergillus niger and its phosphate solubilizing ability when pelleted
with rock phosphate. An A. niger YD 17 obtainedfrom the Laboratory of Microbiology. Faculty of Agriculture, Gadjah Mada
University was used. The pellet was made by mixing rock phosphate (80%) with organic matter (J 3. 9% waste of tapioca. 6% rice bran, and 1% starch) and spore of A. niger. The experimental design was the Complete Randomized Design 5x4 with 3 replicatiOns. The first factor was sources of rock phosphate (Christmas Island. Jordan, China, Ciamis, and Madura). The secondfactor was the number ofinoculums i.e. control without inoculums, 107 • J(t and J(t cfu.g·'. The colony of A. niger that formed at medium of potatoes dextrose agar (PDA) and the amount of soluble phosphorus in the Pikovskaya liquid medium were parameters. Experimental results indicated that sources of rock phosphate and the number of inoculums itif1uence the A. niger survivability and its phosphorus solubilizing ability. Rock phosphate from Ciamis gave the best support for fungus survival and rock phosphate from Christmas Island was the best substrate for phosphate solubilization. The highest soluble phosphate was achieved by ul inoculums.

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Author Biography

Yudi Sastro
Jurnal Tanah dan Lingkungan, dengan ISSN 1410-7333 diterbitkan dua kali setahun yaitu pada bulan April dan Oktober oleh Departemen Ilmu Tanah dan Sumberdaya Lahan (nama baru dari Departemen Tanah), Fakultas Pertanian, Institut Pertanian Bogor. Jurnal Tanah dan Lingkungan menyajikan artikel mengenai hasil penelitian dan ulasan tentang perkembangan mutakhir dalam bidang ilmu tanah, air dan ilmu lingkungan sebagai bahan kajian utama. Setiap naskah yang dikirim ke Jurnal Tanah dan Lingkungan, akan ditelaah oleh penelaah (reviewer) yang sesuai dengan bidangnya. Nama penelaah dicantumkan pada terbitan No. 2 dari setiap volume
Published
2005-10-01
How to Cite
Sastro, Y., Widianto, D., & Prijambada, I. D. (2005). The Effect of Rock Phosphate and Level of Inoculums on The Survivability of Aspergillus niger and Its Solubilization Ability When Pelleted With Rock Phosphate. Jurnal Ilmu Tanah Dan Lingkungan, 7(2), 77-80. https://doi.org/10.29244/jitl.7.2.77-80