Post-fire soil nutrient dynamics in a tropical dry deciduous forest of Western Ghats,India
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  • 英文篇名:Post-fire soil nutrient dynamics in a tropical dry deciduous forest of Western Ghats,India
  • 作者:Satyam ; Verma ; Dharmatma ; Singh ; Ajeet ; Kumar ; Singh ; Shanmuganathan ; Jayakumar
  • 英文作者:Satyam Verma;Dharmatma Singh;Ajeet Kumar Singh;Shanmuganathan Jayakumar;Environmental Informatics and Spatial Modeling Lab, Department of Ecology and Environmental Sciences, School of Life Sciences, Pondicherry University;Landscape Level Planning and Management, Wildlife Institute of India;
  • 英文关键词:Soil properties;;Western Ghats;;Tropical dry deciduous Forest;;Forest fire;;Forest soils
  • 中文刊名:BLDX
  • 英文刊名:森林生态系统(英文版)
  • 机构:Environmental Informatics and Spatial Modeling Lab, Department of Ecology and Environmental Sciences, School of Life Sciences, Pondicherry University;Landscape Level Planning and Management, Wildlife Institute of India;
  • 出版日期:2019-03-15
  • 出版单位:Forest Ecosystems
  • 年:2019
  • 期:v.6
  • 基金:the University Grants Commission, New Delhi for providing the financial support for the Ph.D. research through Junior Research Fellowship (UGC letter No. F. 17-115/98 (SA-I) dated-11 June 2013)
  • 语种:英文;
  • 页:BLDX201901006
  • 页数:9
  • CN:01
  • ISSN:10-1166/S
  • 分类号:69-77
摘要
Background: The effect of forest fire on soil is complex and relatively less understood than its above ground effect.Understanding the effect of fire on forest soils can allow improving management of valuable forest ecosystems as adequate and proper information is very important for efficient management. We have studied the recovery of soil properties after fire, using a chronosequence approach(two, five and fifteen years after fire and control). Soil samples were collected from each plot of four fire patches(B0, B2, B5 & B15) from three different depths viz. 0–10(Top), 10–20(Middle), and 20–30 cm(Bottom).Results: Soil organic carbon was lower than unburned plots after the fire and could not recover to the level of unburned plot(B0) even in 15 years. Total N, available P, and extractable K were lower 2-years and 5-years after the fire but are higher than unburned plot after 15-years. Available nitrogen(NO_3~- and NH_4~+) remain unchanged or higher than B0 in burned patches. Soil pH, Bulk Density, Water Holding Capacity, and Electrical Conductivity was lower initially after the fire. Forest fires have affected soil properties considerably. The response of soil properties varied with years after fire and soil depth.Conclusion: Forest fires occur very frequently in the study area. Significant quantities of carbon and total nitrogen are lost to the atmosphere by burning of litter, duff, and soil OM. Because nitrogen is one of the most important soil nutrients, the recapture of N lost by volatilization during a fire must receive special attention. Long-term studies are required to better understand the recovery of soil nitrogen.
        Background: The effect of forest fire on soil is complex and relatively less understood than its above ground effect.Understanding the effect of fire on forest soils can allow improving management of valuable forest ecosystems as adequate and proper information is very important for efficient management. We have studied the recovery of soil properties after fire, using a chronosequence approach(two, five and fifteen years after fire and control). Soil samples were collected from each plot of four fire patches(B0, B2, B5 & B15) from three different depths viz. 0–10(Top), 10–20(Middle), and 20–30 cm(Bottom).Results: Soil organic carbon was lower than unburned plots after the fire and could not recover to the level of unburned plot(B0) even in 15 years. Total N, available P, and extractable K were lower 2-years and 5-years after the fire but are higher than unburned plot after 15-years. Available nitrogen(NO_3~- and NH_4~+) remain unchanged or higher than B0 in burned patches. Soil pH, Bulk Density, Water Holding Capacity, and Electrical Conductivity was lower initially after the fire. Forest fires have affected soil properties considerably. The response of soil properties varied with years after fire and soil depth.Conclusion: Forest fires occur very frequently in the study area. Significant quantities of carbon and total nitrogen are lost to the atmosphere by burning of litter, duff, and soil OM. Because nitrogen is one of the most important soil nutrients, the recapture of N lost by volatilization during a fire must receive special attention. Long-term studies are required to better understand the recovery of soil nitrogen.
引文
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