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SAINS TANAH - Journal of Soil Science and Agroclimatology
Published by Universitas Sebelas Maret
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Education
Arjuna Subject : -
Articles 13 Documents
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Search results for , issue "Vol 20, No 1 (2023): June" : 13 Documents clear
Identification and pesticide degradation test of bacterial consortium of contaminated soil Retno Rosariastuti; Yulia Rahmawati; Sumani Sumani; Sri Hartati
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 20, No 1 (2023): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v20i1.62920

Abstract

Excessive use of pesticides in the process of cultivating shallots results in contamination of the soil. Indigenous bacteria in soil that contaminated with the chlorpyrifos pesticide suspected could used as bioremediation agent of soil contaminated with chlorpyrifos pesticide. The purpose of this study was to identify and obtain a consortium of bacteria capable in degrading pesticides on shallot fields contaminated with the pesticide chlorpyrifos. The method used in this research is the bacteria isolation using soil extract, morphological identification, molecullar identification using Next Generation Sequencing (NGS), analysis of bacterial diversity index and consortium bacterial degradation test in order to reduce levels of the chlorpyrifos pesticide. The results of this study found 16 isolates of bacteria at each study site that were resistant to 100ppm of the pesticide chlorpyrifos so that these isolates were chosen to be used as a consortium of bacteria. Molecular identification of the bacterial consortium showed that there were 10 genera consisting of Cutibacterium, Streptomyces, Staphylococcus, Ensifer, Ochrobactrum, Achromobacter, Escherichia shigella, Klebsiella, Acinetobacter, and Pseudomonas. The bacterial diversity index in shallot soils reached 2,040 and 1,467 on forest soils The reduction efficiency of the bacterial consortium using the method of growing cells and supernatant were 94.48% and 98.88%, respectively.
Potential solution in sustainable agriculture: improving the pH and pH buffering capacity of gray soil Acrisol from Cu Chi, Ho Chi Minh City, Vietnam using biochar combined with bentonite Nguyen Khanh Hoang; Nguyen Van Phuong; Le Ba Long
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 20, No 1 (2023): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v20i1.63685

Abstract

The acidification of agricultural soils should be avoided, and low pH soils should be corrected for better productivity. Soil improvement by applying biochar from agricultural byproducts combined with bentonite, a rich source in Vietnam, is a trend in green agriculture in the country. The current study is important in assessing the potential influences of biochar and bentonite on the pH and pH buffering capacity (pHBC) of low pH soil collected in Cu Chi, Ho Chi Minh City, Vietnam. Experimental methods, including biochar preparation (pyrolysis at 300°C, retention time: 2 h), soil incubation (time: 30 days, temperature: 27°C), and pH and pHBC determination, were performed. Research results have shown that biochar and bentonite have contributed to improving the pH and pHBC of gray soil samples. Using 1% bentonite and 1% biochar raised the pH to 6.21 and improved the pHBC of Cu Chi gray soil to 24.1 mmolH+/OH- kg-1. This dose is currently suitable for agricultural production in Vietnam. The study confirmed the applicability of biochar derived from cow manure prepared at a low pyrolysis temperature in combination with bentonite to improve soil parameters such as pH and pHBC in Cu Chi gray soil.
Effect of rice straw and garbage enzyme addition on soil properties and plant growth of rice Toan Nguyen-Sy; Hanh Hong Do; Yen Anh Thi Tran; Hoa Thi Kieu; Uyen Huynh Thi Diem; Ngoc-Son Tran
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 20, No 1 (2023): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v20i1.65267

Abstract

The objective of the current study was to examine the impacts of rice straw and garbage enzyme generated from local vegetable and fruit waste on plant growth and carbohydrate or ammonium extraction from paddy soil after one month of growth in a pot experiment. Samples of topsoil were obtained from a depth of 0-15 cm, and the following treatments were applied: control (10 g soil), RS (adding 30 g soil + 0.6 g rice straw), GE (30 g soil + garbage enzyme), and combination (adding 30 g soil+ rice straw and garbage enzyme) maintained at room temperature. The study findings indicated that there were no observable impacts of rice straw and garbage enzyme application on biomass. However, RS addition seems to reduce root length but enhance shoot length. Soil carbohydrates that were extracted ranged from 61 to 207 mg kg−1 soil, and treatments with rice straw addition exhibited significantly higher levels compared to those without it (p < 0.05). The ammonium content was low. It could be concluded that at the initial seedling stage, rice straw has more effects on soil properties and plant growth than garbage enzyme. To fully assess the effects of rice straw and garbage enzyme on soil properties and plant growth, it is recommended that further research be conducted over longer periods

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