Update Artikelilmiah: 21392

DESY WULAN SARI

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Abstrak (Bhs. Indonesia)

Penelitian ini bertujuan untuk mengetahui aktivitas mirob tanah dan eksplorasi bakteri PGPR pada sistem pertanian organik dan konvensional. Penelitian dilaksanakan di Laboratorium Mikrobiologi, Pusat Penelitian Biologi LIPI, Bogor pada bulan Juli – Desember 2017. Variabel yang diamati yaitu populasi bakteri, respirasi tanah, enzim urease, enzim PME-ase dan eksplorasi bakteri potensial PGPR serta uji hayati untuk mengetahui pengaruh isolat PGPR terhadap pertumbuhan bibit tanaman padi INPAGO LIPI GO 2 menggunakan 12 isolat potensial dengan tiga kali ulangan. Hasil penelitian menunjukkan bahwa aktivitas mikrob tanah sistem pertanian padi organik lebih tinggi dengan peningkatan populasi bakteri 12 kali lipat, respirasi tanah 49,42%, aktivitas urease 8,97% dan aktivitas  PME-ase 24,26% dibandingkan dengan sistem pertanian padi konvensional. Aplikasi isolat TPK1a, TPO5a.1, TPO5g.1, berpengaruh nyata terhadap panjang akar. Aplikasi isolat TPK3b, TPK5b.2, TPK9b.1, TPK1a, TPK4b, TPK6a, TPO7i, TPO8a.1, TPO9b.1,TPO5a.1, TPO5g.1, TPO6g, berpengaruh nyata terhadap kandungan klorofil daun. Aplikasi isolate TPK9b.1, TPK1a, TPK6a, TPO7i, TPO8a.1, TPO9b.1, TPO5a.1, TPO5g.1, dan TPO6g berpengaruh nyata terhadap bobot segar tanaman.

Abtrak (Bhs. Inggris)

Objective of this study to know activity of soil microbes and exploration potential bacteria as PGPR in different farming systems of organic and conventional. This study was carried out at laboratory of Agriculture Microbiology in July-December 2017. Observed variables of microbe activity were population of bacteria, urease activity, PME-ase activity, and PGPR potential, and seedling bioassay test on INPAGO LIPI GO 2 using without isolat and 12 potential isolates with three replicates. The results showed that activity of microbes in organic system of rice was higher i,e. population of bacteria 12 fold, soil respiration 49,42%, urease activity 8,97%, and PME-ase acltivity 24,26% than conventional system. Aplication of isolate TPK1a, TPO5a.1, TPO5g.1 were significant effect on root lenght. TPK3b, TPK5b.2, TPK9b.1, TPK1a, TPK4b, TPK6a, TPO7i, TPO8a.1, TPO9b.1, TPO5a.1, TPO5g.1, and TPO6g were significant effect on chlorophyl. TPK9b.1, TPK1a, TPK6a, TPO7i, TPO8a.1, TPO9b.1, TPO5a.1, TPO5g.1, and TPO6g were significant effect on fresh weight of biomass.

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