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All Journal AGRIVITA, Journal of Agricultural Science Andalasian International Journal of Applied Science, Engineering, and Technology
Kasim, Susilawati
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Mechanical Engineering

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The Study of Laccase Activity as a Biosensor for Peatland Degradation in Oil Palm Plantations in Pesisir Selatan of West Sumatra: The Study of Laccase Activity as a Biosensor for Peatland Degradation in Oil Palm Plantations in Pesisir Selatan of West Sumatra Harianti, Mimien; Budi Prasetyo, Teguh; Maira, Lusi; Junaidi, Junaidi; Herviyanti, Herviyanti; Anwar, Syaiful; Kasim, Susilawati
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 3 No. 3 (2023): November 2023
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v3i3.113

Abstract

The aim of the research was to study enzyme activity as biosensors for peatland degradation in oil palm plantations. The study was conducted in Pesisir Selatan,West Sumatra, on two peatlands with different thicknesses and location coordinates, namely peat with a thickness of <3 m S: 02o18'45.5", 101o00’37.3” and peat with a thickness >3 m S: 02o20’07.5”, E: 101o00’22”. The oil palm in these two locations is 11 years old (planting year of 2007). Observations and sampling of peatlands were carried out on the plantation blocks using the transect method. The transect was set perpendicular to the drainage canal. Peat samples were collected outside the roots (non-rhizosphere) of oil palm. Observation sites were at a distance of 5, 15, 25, 50, 75, 100, 150 m from the edge of the drainage canal and at the thickness of the root layer of 0-25 and 25-50 cm. Peat characteristics observed were water table level, laccase activity, water content, pH, total Fe, and Cu. The water table level in one transect ranged from 60-80 cm and was still within tolerable limits. The laccase activity as a peat degradation biosensor in oil palm plantations in Pesisir Selatan peatland was higher in the 0-25cm layer with an average of <0.5 µmol/g. The increase in water content decreased the laccase activity along with increasing of the distance from the drainage canal and the thickness of the peat layer. The increase in Fe and Cu resulted from increased levels of ash, particularly in peat with a thickness of <3 m, may suppress laccase activity. Peatland in the oil palm plantation of Pesisir Selatan is still relatively stable despite the decomposition processes characterized by laccase activity as a biosensor for peat degradation.
The Study of Laccase Activity as a Biosensor for Peatland Degradation in Oil Palm Plantations in Pesisir Selatan of West Sumatra: The Study of Laccase Activity as a Biosensor for Peatland Degradation in Oil Palm Plantations in Pesisir Selatan of West Sumatra Harianti, Mimien; Budi Prasetyo, Teguh; Maira, Lusi; Junaidi, Junaidi; Herviyanti, Herviyanti; Anwar, Syaiful; Kasim, Susilawati
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 3 No. 3 (2023): November 2023
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v3i3.113

Abstract

The aim of the research was to study enzyme activity as biosensors for peatland degradation in oil palm plantations. The study was conducted in Pesisir Selatan,West Sumatra, on two peatlands with different thicknesses and location coordinates, namely peat with a thickness of <3 m S: 02o18'45.5", 101o00’37.3” and peat with a thickness >3 m S: 02o20’07.5”, E: 101o00’22”. The oil palm in these two locations is 11 years old (planting year of 2007). Observations and sampling of peatlands were carried out on the plantation blocks using the transect method. The transect was set perpendicular to the drainage canal. Peat samples were collected outside the roots (non-rhizosphere) of oil palm. Observation sites were at a distance of 5, 15, 25, 50, 75, 100, 150 m from the edge of the drainage canal and at the thickness of the root layer of 0-25 and 25-50 cm. Peat characteristics observed were water table level, laccase activity, water content, pH, total Fe, and Cu. The water table level in one transect ranged from 60-80 cm and was still within tolerable limits. The laccase activity as a peat degradation biosensor in oil palm plantations in Pesisir Selatan peatland was higher in the 0-25cm layer with an average of <0.5 µmol/g. The increase in water content decreased the laccase activity along with increasing of the distance from the drainage canal and the thickness of the peat layer. The increase in Fe and Cu resulted from increased levels of ash, particularly in peat with a thickness of <3 m, may suppress laccase activity. Peatland in the oil palm plantation of Pesisir Selatan is still relatively stable despite the decomposition processes characterized by laccase activity as a biosensor for peat degradation.
Utilization of Yeasts in Promoting Plant Growth in Acidic Soil – A Review Rawichandran, Darshini; Kasim, Susilawati; Kee Zuan, Ali Tan; Effendi, Mohd Izuan; Raguraj, Sriharan
AGRIVITA Journal of Agricultural Science Vol 46, No 1 (2024)
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.v46i1.4241

Abstract

The ecosystem's biodiversity and soil microorganisms are impacted by the increasing use of synthetic fertilizers and pesticides, which causes soil acidity and limits the sustainability of agricultural output. The majority of microbial functions in acidic soil are inhibited because of decreasing nutrient cycling and organic matter decomposition as well as diminishing bacterial and fungal growth and reproduction.  In light of these growing concerns, the use of microorganisms as bio fertilizers is a recommended as alternative agricultural practice. Recent times have brought about a change in the paucity of study on yeasts and their ability to safely boost plant growth. Numerous works on bacteria have been made available. The primary objective of the study is to highlight the widespread application of yeasts in sustainable agricultural practices to promote plant growth in acidic soils. All of the advantages that yeasts provide may contribute to the growth of plants. Therefore, a thorough investigation into yeasts may be fruitful and offer a sustainable means of boosting agricultural yields that are necessary in acidic soil.
Co-Authors Budi Prasetyo, Teguh Effendi, Mohd Izuan Harianti, Mimien Herviyanti Herviyanti Junaidi Junaidi Kee Zuan, Ali Tan Raguraj, Sriharan Rawichandran, Darshini Syaiful Anwar