Electronic Theses and Dissertation

Salah satu usaha untuk meningkatkan produksi padi dilakukan melalui pemupukan fosfat. Kemampuan pelarutan P oleh mikroba merupakan salah satu aktivitas penting yang dibutuhkan bagi tumbuhan berkaitan pemenuhan kebutuhan tumbuhan. Pemanfaatan mikroorganisme pelarut fosfat diharapkan dapat menjadi solusi dalam permasalahan ketersediaan P pada lahan padi. Metode yang digunakan dalam penelitian ini adalah metode deskriptif kuantitatif. Pengambilan sampel tanah dilakukan dirumah kasa Fakultas Pertanian Universitas Syiah Kuala. Sampel tanah diambil pada 8 area rizosfer tanaman padi yang sudah berumur 110 hari menggunakan sekop steril. Varietas yang diteliti yaitu varietas unggul nasional ciherang (g1). Sigupai asal Aceh Barat Daya yang terdiri dari (g2), (g3), (g4). Sanbei asal Kabupaten Simeuleu yakni (g5), (g6), (g7). Sikuneng asal kabupaten Bireuen yaitu (g8) dan (g9). Setiap titik lokasi pengambilan sampel, diambil tanah sebanyak 3 titik di satu tanaman padi dan dikompositkan. Isolasi mikroorganisme pelarut fosfat dilakukan dengan metode cawan tuang pada media pikovskaya, setelah tahap isolasi dilakukannya perhitungan populasi bakteri pelarut fosfat asal rizosfer tanaman padi.

One effort to increase rice production is carried out through phosphate fertilization. The ability to solubilize P by microbes is one of the important activities required by plants in relation to meeting plant needs. It is hoped that the use of phosphate solubilizing microorganisms can be a solution to the problem of P availability in rice fields. The method used in this research is a quantitative descriptive method. Soil sampling was carried out in the screen house of the Faculty of Agriculture, Syiah Kuala University. Soil samples were taken from 8 areas of the rhizosphere of rice plants that were 110 days old using a sterile shovel. The variety studied was the national superior variety Ciherang (g1). Sigupai from Southwest Aceh consisting of (g2), (g3), (g4). Sanbei from Simeuleu Regency namely (g5), (g6), (g7). Sikuneng from Bireuen district are (g8) and (g9). At each sampling location, 3 soil points were taken from one rice plant and composited. Isolation of phosphate solubilizing microorganisms was carried out using the pour plate method on Pikovskaya media, after the isolation stage the population of phosphate solubilizing bacteria from the rhizosphere of rice plants was calculated.