Isolasi Dan Identifikasi Bakteri Penghasil Iaa Dan Pelarut Fosfat Dari Rhizosfer Tanaman Kelapa Sawit

Abstract

The potential of various genera and species of rhizosphere bacteria is well known. This study aims to determine the diversity and physiological characteristics of the rhizosphere bacterial isolates of oil palm plants at PTPN III Aek Nabara Labuhanbatu North Sumatra. This research was conducted in July 2018 to October 2018 in laboratory of STIPER Labuhanbatu. This research was conducted by isolating bacteria from the root rhizosphere of oil palm plants, characterizing the morphology and physiology of isolates by phosphate dissolution test and indole acetic acid production test. Furthermore, the data was analyzed descriptively. Based on the isolation results obtained 10 bacterial isolates with different macroscopic and microscopic morphological characteristics with the largest amount of dissolved phosphate produced by isolate R05 (0.211 mg / l) and the largest amount of IAA produced by isolate R04 (0.097 mg / l). Isolates R05 and R04 have the potential to be further tested.

Potensi Rhizobakteri Tanaman Jahe Merah (Zingiber officinale Linn. Var Rubrum) di Kabupaten Halmahera Utara sebagai Agen Pemacu Pertumbuhan Tanaman

“…Supernatan diambil sebanyak 1 ml dan dilarutkan ke dalam 1 ml reagen Salkowski dan diinkubasi dalam tempat gelap yang tidak terkena cahaya selama 24 jam pada suhu kamar. Produksi IAA diukur menggunakan spektrofotometer pada absorbansi 535 nm (Walida et al, 2019).…”

Bacillus sp. Effectivity test as a growth supressor agent from antrachnose disease caused by Colletotrichum sp. on cayenne pepper plant (Capsicum frutescens L.)

“…-Phosphate solvent test The phosphate solvent test followed the modified method (Walida et al, 2019). Phosphate solvent medium in 50 ml consisted of 1,565 g pikov'skaya, 0.25 g Ca3(PO4)2, and 50 ml RO water.…”

“…Then incubated until a clear zone appears at room temperature. If a clear zone appears around the bacterial colony, it indicates that the bacteria can dissolve phosphate (+) (Walida et al, 2019).…”

Perbandingan Aspek Ekonomi Penggunaan Pupuk Juhar dengan Pupuk NPK pada Kelapa Sawit

“…Pupuk mengandung bahan baku yang diperlukan pertumbuhan dan perkembangan tanaman, sementara suplemen seperti hormon tumbuhan membantu kelancaran proses metabolisme. (Ajiputra, et al, 2019;Walida, et al, 2019;Fachrial, & Harmileni, 2018;sartini, et al, 2018;Bindrianes, et al, 2017;Chairunnisa, et al, 2019). Meskipun demikian, ke dalam pupuk khususnya pupuk buatan, dapat ditambahkan sejumlah material suplemen.…”