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All Journal Jurnal Agroekoteknologi SAINS TANAH - Journal of Soil Science and Agroclimatology
Mieke Rochimi Setiawati
Faculty of Agriculture, Padjadjaran University
Agriculture, Biological Sciences & Forestry Education

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Molecular identification of isolates from local microorganisms as potential biofertilizer Abdul Hasyim Sodiq; Mieke Rochimi Setiawati; Dwi Andreas Santosa; Dedi Widayat
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 18, No 2 (2021): December
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v18i2.44476

Abstract

Local microorganisms (MOL) are liquid fertilizers commonly used by farmers to help increase crop production. Beneficial microbes in MOL need to characterize their interactions and ability to produce growth drive compounds. The purpose of this research is to identify the superior microbial isolates from MOL made by farmers from Cibodas Lembang Bandung, Indonesia that can produce phytohormones as biofertilizers. The results of the microbial selection of MOL derived from three best microbes are 1A-2 NFB, 4A-1 NFB, and 4B-1 NFB with the ability to produce auxin, i.e., 19.41 ppm, 17.18 ppm, and 10.59 ppm, respectively. The compatibility test between the three isolates showed negative results so that it was possible to apply three microbes as a consortium. The results of a molecular identification with a 16S rRNA analysis indicate strain microbe 1A-2 NFB: Bacillus cereus (99.88% homology), 4A-1 NFB: Bacillus cereus (99.76% homology), and 4B-1 NFB: Lysinibacillus sp. (99.88% homology).
Pengaruh Konsentrasi dan Interval Aplikasi Pupuk Hayati Terhadap Kandungan N Tanaman, N-Total Tanah, Populasi Bakteri Endofitik, dan Hasil Tanaman Pakcoy (Brassica rapa L.) Mieke Rochimi Setiawati; Nurullita Fitri Qurnia; Anne Nurbaity
Jurnal Agroekoteknologi Vol 14, No 2 (2022)
Publisher : Jurusan Agroekoteknologi Fakultas Pertanian Untirta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jur.agroekotetek.v14i2.17270

Abstract

The purpose of this research was to analyze the effect of Azolla biofertilizer application on plant N content, total soil N, endophytic bacteria population, and yield of pakcoy on Inceptisol Jatinangor soil. The research was carried out from August until November 2021 at Plastic House of the Faculty of Agriculture, Padjadjaran University, Sumedang with an altitude of ±750 m above sea level. The research was arranged in Factorial Randomized Block Design. The first factor was the concentration of biofertilizer were 5 ml L-1; 10 ml L-1; 15 ml L-1; and 20 ml L-1. The second factor was application intervals of one time, two times, and three times with three replications. Results showed that no interaction between various concentrations and application intervals of biofertilizer application on all parameters. The concentration of biofertilizer had significant effects on total nitrogen (N) soil, endophytic bacteria population, and yield of pakcoy, but had no significant effect on plant N content. The application intervals of biofertilizer did not affect on all parameters. Furthermore, the treatment of biofertilizer with concentration of 10 ml L-1 gave highest yield on the yield of pakcoy parameter which was 164.89 g but was not significantly different from the treatment with concentration of 15 ml L-1 and 20 ml L-1.
Pengaruh Pupuk Hayati dan Briket Amelioran terhadap Pertumbuhan Tanaman Padi pada Tanah Salin Mieke Rochimi Setiawati; Syifa Nabila Kurnia; Pirda Nurhopipah; Anas Ramdhani; Pujawati Suryatmana; Diyan Herdiyantoro; Tualar Simarmata; Betty Natalie Fitriatin
Jurnal Agroekoteknologi Vol 15, No 1 (2023)
Publisher : Jurusan Agroekoteknologi Fakultas Pertanian Untirta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jur.agroekotetek.v15i1.19763

Abstract

Utilization of saline land as an effort to increase rice productivity is still constrained by the adverse effects of salinity stress. The solution to this effort can be done by utilizing PGPR biofertilizers and applying ameliorant briquettes. The purpose of this study was to evaluate the effect of using biofertilizers and ameliorant briquettes on saline soils with various levels of salinity on the growth of rice plants. This research was conducted at the Ciparanje Jatinangor screen house from September 2022 to January 2023. The research design used was a randomized block design with 12 treatments and 3 replications. The treatment applied was PGPR biofertilizer, ameliorant briquettes, and their combination on saline soil 4 and 8 dS m-1 compared to control (non-saline soil). The results showed that PGPR biofertilizer increased the height of rice plants on saline soils 4 and 8 dS m-1 7 DAP. At 14 DAP, PGPR biofertilizer, ameliorant briquettes, and their combinations did not increase rice plant height, root length and volume, wet weight, and dry weight of rice plants, although the application of biofertilizers, ameliorant briquettes, and their combinations tended to increase wet weight and dry weight of rice plant compared to soil with the same salinity without biofertilizers and ameliorant briquettes.
Co-Authors Abdul Hasyim Sodiq Anas Ramdhani Anne Nurbaity Betty Natalie Fitriatin Dedi Widayat DIYAN HERDIYANTORO DWI ANDREAS SANTOSA Nurullita Fitri Qurnia Pirda Nurhopipah Pujawati Suryatmana Syifa Nabila Kurnia Tualar Simarmata