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POTENSI BAKTERI PELARUT FOSFAT DAN DIAZOTROF DARI RHIZOSFER KELAPA SAWIT TANAH GAMBUT SAPRIK TERHADAP PERTUMBUHAN BIBIT KELAPA SAWIT Ida Nur Istina; Happy Widiastuti; Heri Widianto
Jurnal Agroteknologi Vol 10, No 2 (2020): Februari 2020
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/ja.v10i2.7670

Abstract

Utilization of biological fertilizer has the potential to reduce inorganic fertilizer application in oil palm cultivation. The aims of this research to obtain the potential of phosphate (P) solubilizing and diazotrophic bacteria from oil palm rhizosphere towards palm oil seedling growth. This research has been done on Sapric peat soil at Pelalawan Regency, Riau Province from June to November 2014, using a factorial randomized block design (3x5 with 3 replications). The first factor were the potential bacteria isolates (Io = without isolates; I1 = Isolate T5.1 + T7. I2 = Isolate T9.1 + T5); the second factor were NPK fertilizer dosage (p1-100%; p2 = 85%; p3 = 70% fertilizer and p4 = 55% recommended fertilizer). The results showed that sapric peat soil was a potential source of P solubilizing bacteria with the ability to solubilized of P up to 329.94 ppm, and diazotrophic bacteria with the ability of N-fixation up to 0.0293 mmol/L/ hr.  Application of 70% N and P fertilizers and i2 isolate provides the best vegetative growth performance of oil palm seedlings and reduces 30% of inorganic fertilizers application.
Peningkatan Produksi Bawang Merah Melalui Teknik Pemupukan NPK Ida Nur Istina
Jurnal Agro Vol 3, No 1 (2016)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/810

Abstract

Bawang merah merupakan salah satu komoditas hortikultura strategis yang penyebarannya hampir di seluruh wilayah Indonesia. Permasalahan pengembangan komoditas ini adalah masih rendahnya produktivitas sebagai akibat adaptasi dan kecukupan asupan hara tanaman. Penelitian yang bertujuan untuk mendapatkan jenis pupuk NPK yang efektif dan efisien telah dilakukan di desa Langensari Kecamatan Lembang Kabupaten Bandung Barat dari Maret sampai Mei 2014 menggunakan Rancangan Acak kelompok (RAK) dengan 6 perlakuan dan 3 kali ulangan. Pupuk NPK yang digunakan adalah A= NPK 18+9+10+Te, B=NPK 15+15+sulfat 10, C=NPK 12+11+18z+(S) z +3 Mg+3,8S+Te, D= NPK 15+9+20(S)+2 MgO+3,8 S+Te, E= NPK 25+7+7 dan F=kontrol. Parameter yang diamati meliputi: tinggi tanaman, jumlah umbi, jumlah daun, panjang umbi (cm), diameter umbi (cm), bobot basah (g) dan bobot kering brangkasan (g). Hasil penelitian menunjukkan bahwa NPK 12+11+18z+(S)z+3 Mg+3,8S+Te menghasilkan bobot umbi terbaik. The shallot is one of the strategic and valuable horticultural commodities which is spreaded almost all over Indonesia area. Commodity development constrain by the low productivity as a result of adaptation and inadequate intake of plant nutrients. The research purposed  to get the kind of NPK fertilizers that was efective and efficient on shallot production had been done in the Langensari village Langensari Lembang district, West Bandung regency from March till May 2014, using Randomized Block Design (RBD) with 6 treatments and 3 repplications. NPK fertilizer used were: A = NPK 18+9+10+Te, B = NPK 15+15+sulfate 10, C = NPK 12+11+18z+(S) z + 3 Mg+3,8S+Te, D = NPK 15+9+20(S)+2MgO+3,8 S+Te, E = NPK 25+7+7 and F = control. The observed parameters were plant height (cm), number of tubers, leaf number, tuber length, tuber diameter, fresh weight and dry weight tuber. The results showed that NPK 12+11+18z+ (S)z+3 Mg+3,8S+Te gave the best growth and production.
SUMBANGAN MIKROBA PELARUF FOSFAT INDEGENUS TERHADAP PENINGKATAN PRODUKTIVITAS LAHAN PERTANIAN DI PROVINSI RIAU Ida Nur Istina; Nurhayati Nurhayati; Jakoni Jakoni
DINAMIKA PERTANIAN Vol. 35 No. 3 (2019): Jurnal Dinamika Pertanian Edisi Khusus, Nomor 3 2019
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/dp.2019.vol35(3).4562

Abstract

ABSTRACT The obstacle to agricultural development in peatlands is the low nutrient content needed for plant growth. One effort that can be done to increase agricultural productivity in peatlands is a friendly environmental fertilization. This research aims to find out the role of indigenous phosphate solubilizing microbes in enhanced peat soil fertility in Kampar District in 2014 by using a Factorial Randomized Block Design with 3 replications. First factor was MPF inoculation (control; Burkholderia gladioli and penicillium aculeatum), and the second factor was Ameliorants (Control, Oil Palm Empty Fruit Bunch (TKKS) Compost, 4 kg TKKS compost/polybag and 25% recommended dosage, 4 kg TKKS compost/polybag and 50% recommended dosage, 4 kg TKKS compost/polybag and 75% recommended dosage, 4 kg TKKS compost/polybag and 100% P recommended dosage. Soil Nutrient analyses carried out at the laboratories of Vegetable Crops Research Institute Lembang. The parameters observed were: soil content of nutrients N, P, K, Ca, and Mg. The results showed that the indigenous phosphate solubilizing microbe increased the soil's nutrient content.
Co-Authors HAPPY WIDIASTUTI Heri Widianto Jakoni Jakoni Nurhayati Nurhayati