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All Journal Jurnal Fitopatologi Indonesia JURNAL PERTANIAN PRESISI (JOURNAL OF PRECISION AGRICULTURE)
Arif Wibowo
Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Medicine & Pharmacology

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Pengaruh Dosis Pupuk Urea terhadap Kandungan N Tanah, Serapan N dan Hasil Umbi Bawang Merah pada Tanah Steril dan Tanah Inokulasi Ratih Kurniasih; Arif Wibowo; Sri Nuryani Hidayah Utami
Jurnal Pertanian Presisi (Journal of Precision Agriculture) Vol 1, No 1 (2017): Jurnal Pertanian Presisi Volume 1, Nomor 1, 2017
Publisher : Universitas Gunadarma

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Abstract

Fusarium wilt of shallot is caused by Fusarium solani could affect yield on shallot planting. This research was conducted to study the effect of  addition urea fertilizer on total nitrogen of soil, ammonium, nitrate, nitrogen uptake of foliage and bulbs, and bulbs yield of shallot. This research was conducted at KP4 Kalitirto Berbah and Faculty of  Agriculture, Gadjah Mada University with Randomized Complete Block Design (RCBD) with 2 factors and 4 replications. The first factor was two type of soil which were inoculated soil by Fusarium solani inoculums and sterilized soil by heating  treatment at more than 100 °C at least 3 hours. The second factor was five different dose of urea and KCl fertilizer on percentage (0, 50, 100, 150 and 200) from fertilizer recommendation. The result showed that total nitrogen of soil, ammonium, nitrate in inoculated soil lower  compared to sterilized soil. There is a positive and significant correlation between ammonium and total nitrogen of soil to fresh weight of bulb, the number of bulb and nitrogen uptake of foliage. Likewise, the fresh weight of bulbs and the number of bulb has a positive and highly significant correlation with nitrogen uptake of foliage and nitrogen uptake of bulb.
Keragaman Rhizomikrobiom Bawang Merah dan Penekanan Penyakit Moler dengan Perlakuan Bacillus spp. dan Trichoderma asperellum Dini Sundari; Arif Wibowo; Tri Joko; Ani Widiastuti; Arlyna Budi Pustika
Jurnal Fitopatologi Indonesia Vol 19 No 4 (2023): Vol. 19 No. 4 (2023)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14692/jfi.19.4.156-165

Abstract

Twisted disease (Fusarium spp.) is an endemic disease that reduces shallot production in the coastal land area of Samas, Bantul, Yogyakarta. The application of Bacillus spp. can suppress the twisted disease by secreting secondary metabolites and enhancing soil suppressiveness. This study aimed to determine the effectiveness of adding spraying Bacillus spp. on the disease incidence, production of shallots, and their effect on the diversity of rhizomicrobiome by culture microbe approaches. Bacillus spp. with a density 108 cfu mL-1, Trichoderma asperellum 106 cfu mL-1 was applied by spraying to the shallot. Fungicide chlorothalonil, propiconazole, and prochloraz were used to control the disease. The diversity of rhizobacteria and fungi was analyzed using the ribosomal intergenic spacer analysis (RISA) method. Based on the analysis result, the addition of spraying B. velezensis B-27, combination B. velezensis B-27 and B. cereus RC76, and T. asperellum was unable to enhance the suppression of twisted disease, but it was able to enhance the production of shallot bulbs reaching 7.10, 7.80, and 8.43 ton ha-1. Furthermore, the result revealed the diversity of the rhizomicrobiome, spraying Bacillus sp. showed 39% differences in bacterial diversity with control while T. asperellum caused 43% difference in the diversity. Spraying Bacillus spp. has not been able to suppress the incidence of twisted diseases compared to control. However, the similar disease incidence on a spraying Bacillus spp. and control showed a higher production until 70% compared to control. This result showed that the addition of spraying Bacillus spp. able to increase the tolerance of shallot plants toward twisted disease.
Co-Authors Ani Widiastuti Arlyna Budi Pustika Dini Sundari Ratih Kurniasih Sri Nuryani Hidayah Utami Tri Joko