Abstract
At this time the oportunity increasing soybean production still open through optimize the fulfill of the nutrient of plants. Phosphorus is one of element nutrient essentiality macro those as very important to growth and development of plants. The existence it in land abundance, but the concentration P who are get reserve by plant is very low. At acid land P bunching aluminum (AI) and iron (Fe) meanwhile in land Alkhalin P bounded calsium (Ca). The increasing efesiency of supply fosfat at plant can effort with exploit microorganism soluble phosphate group. Test potential solubility P by BPF isolated from peat soil Biosphere Reserve Giam Siak Kecil Bukit Batu, Riau. Test was conducted and taken in semi-quantitative which able to dissolve Ca3 (PO4) 2, FePo4 and phosphate rock. However adaptability and potential dilution BPF origin peat soils of Riau indigenus inoculated soybean in mineral soil until now unknown. This research was conducted in order to determine the effect of inoculation BPF indigenus Riau toward growth and yield of soybean. The study was conducted in factorial experiment using completely randomized design (RAL Factorial), as the first factor is soil treatment consisting of two levels ie: T0: soil without sterilization, T1: sterilized soil. The second factor is the provision isolates BPF which consists of 4 levels, namely: B0: without inoculation, B1: 2 isolates BPF (BB_UB6 and BB_K9), B2: 3 isolates BPF (BB_UB6, BB_K9 and BB_K2), B3: 4 isolates BPF (BB_UB6, BB_K9, BB_K2, and BB_HS13). The results showed soil sterilization decrease the number of primary branch becomes 5.67 and 1.49 g dry weight of the plant. The fastest time of harvest occurs in plants without inoculation of sterile soil that is 78.78. The highest weight of 100 seeds produced by the plant without inoculation of sterile soil that is 13.17 g.
Highlights
Fosfor adalah salah satu unsur hara esensial makro yang berperan sangat penting dalam pertumbuhan dan perkembangan tanaman
The results showed soil sterilization decrease the number of primary branch becomes 5.67 and 1.49 g dry weight of the plant
Pengaruh Inokulasi Campuran Isolat Bakteri Pelarut Fosfat (Lufita Nur Alfiah, et al.) 14
Summary
Rancangan Acak Lengkap (RAL Faktorial), sebagai faktor 1 adalah perlakuan tanah yang terdiri dari 2 taraf yaitu: T0: tanah tanpa sterilisasi, T1: tanah disterilisasi, Faktor kedua yaitu pemberian isolat BPF yang terdiri dari 4 taraf yaitu: B0: tanpa inokulasi BPF B1 : 2 isolat. : Pembuatan starter 1 diawali dengan pembuatan starter dari dua isolat (BB_UB6 dan BB_K9 ) dengan cara menginokulasikan 1 ose masing-masing isolat bakteri ke dalam 10 ml medium Pikovskaya cair dan dilanjutkan inkubasi pada suhu ruang selama 24 jam dengan agitasi 150 rpm. Starter 2 (campuran 3 isolat BPF): Pembuatan starter 2 diawali dengan pembuatan starter dari tiga isolat (BB_UB6, BB_K9, dan BB_K2) dengan cara menginokulasikan 1 ose masing-masing isolat bakteri ke dalam 10 ml medium Pikovskaya cair dan dilanjutkan inkubasi pada suhu ruang selama 24 jam dengan agitasi 150 rpm. Starter 3 (campuran dari 4 isolat BPF): Pembuatan starter 3 diawali dengan pembuatan starter dari empat isolat (BB_UB6, BB_K9, BB_K2, dan BB_HS13) dengan cara menginokulasikan 1 ose masing-masing isolat bakteri ke dalam 5 ml medium Pikovskaya cair dan dilanjutkan inkubasi pada suhu ruang selama 24 jam dengan agitasi 150 rpm. Pemberian pupuk tambahan yakni pupuk urea dengan dosis 0,125 gram/polibek dan KCl 0,5 gr/polibek dilakukan pada 20-30 hari setelah tanam.Pengamatan yang diamati meliputi tinggi tanaman, jumlah cabang primer, jumlah cabang produktif, berat kering tanaman, umur panen, jumlah dan persentase polong bernas, jumlah biji per tanaman, bobot biji per tanaman dan bobot 100 biji
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