Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal AGRIVITA, Journal of Agricultural Science JURNAL BIOLOGI PAPUA
Zarate, Jocelyn T.
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Materials Science & Nanotechnology

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Impact of Underground Gold Mining on Soil Chemistry and Biology: Indigenous Microbe-Driven Rehabilitation? Fahikasari, Indah; Wulandari, Dewi; Widiastuti, Happy; Zarate, Jocelyn T.
Jurnal Biologi Papua Vol 17 No 1 (2025)
Publisher : Jurusan Biologi FMIPA Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jbp.4601

Abstract

Gold mining boosts Indonesia's GDP and exports. However, gold mining changes soil chemical and biological qualities, and therefore harming the environment. Thus, rehabilitating post mining land using environmentally friendly and chap method are essential for soil and ecosystem health. Nitrogen (N), and phosphorus (P) are the most limiting factors in degraded mining area. Azotobacter sp. and Rhizobium sp. are well-known in assisting plant by providing N. Paraserianthes falcataria is well-known as a fast-growing tree species that have good symbiosis with Rhizobium sp. This study examines the chemical and biological effects of underground gold mining on soil and the ability of indigenous Azotobacter sp. and Rhizobium sp., to improve the soil of post gold mining under greenhouse condition. Soils were sampled from natural forest (NF), tailing (T), and 3 different ages of rehabilitated area: 1 year old, 2 year old, and 5 year old. According to this study, gold mining negatively effect on soil organic carbon and nitrogen levels. One Rhizobium sp. isolate and 12 Azotobacter spp. isolates were found in post mining soil. All Azotobacter spp. isolates fixed nitrogen by NFB test and produced IAA. All Azotobacter spp. was determined as gram negative bacteria. A greenhouse study found that Azotobacter sp. inoculation with 10% compost improved the soil quality by increasing soil organic carbon, soil N, soil available P, and exchangeable K. Therefore, this improvement on soil condition increased seedlings height, diameter, and biomass growing in gold tailings soil. These findings highlight the necessity of employing indigenous microorganisms and organic materials to improve soil quality and plant growth on former gold mining areas.
Potential of a Biofertilizer to Control Peregrinus maidis (Hemiptera: Delphacidae), an Insect Vector of Maize Mosaic Alphanucleorhabdovirus Alviar, Karen B.; Zarate, Jocelyn T.; Yap, Sheryl A.; Albez, Rickson C.; Barbin, Arabelle Izza
AGRIVITA Journal of Agricultural Science Vol 47, No 3 (2025)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v47i3.4842

Abstract

The use of biofertilizers in combination with synthetic fertilizer has been effective in managing the population of Peregrinus maidis. The impact of a biofertilizer was assessed through the response of P. maidis. Corn plants were planted in potted soil with four different treatments. Plant defensin expression was determined using semi-quantitative PCR analysis, while lugensin expression in insects was analyzed using two-step semi-quantitative RT-PCR. Defensin is shown to be expressed in corn upon insect infestation on both biofertilizer Mykoplus and a combination of urea and complete fertilizers. The plants treated with the combination of urea and complete fertilizer  had similar numbers of insects (25%) to plants treated with biofertilizer alone. It was worth noting that although female macropters preferred biofertilizer-treated plants for oviposition, their preference in plants treated with urea and complete biofertilizer is not significantly different. Interestingly, the corn plants treated with biofertilizer plus urea had a similar number of oviposited eggs among the treatments (P=0.8166). This research presents novel results as it explores the potential benefits of using biofertilizers as a biocontrol method to manage the population of insect vectors that transmit a viral phytopathogen affecting corn.
Co-Authors Albez, Rickson C. Alviar, Karen B. Barbin, Arabelle Izza Dewi Wulandari Fahikasari, Indah HAPPY WIDIASTUTI Yap, Sheryl A.