Abstract
ABSTRACT This research consists of a comparative study through the controlled application of fire under different conditions of natural and exotic phytophysiognomy of the Cerrado vegetation area. The area of study is located in Cerrado recovery vegetation and degraded pasture areas. On this area, five experimental plots were established from the specific characteristic of its vegetation cover, slope and soil type (treatments) and connected to a Gerlach trough that accumulates the runoff and were weekly measured. Two artificial fires were applied to plots in an interval of 8 months in attempt to understand the effects of fire on runoff, sediment yield and regrowth of vegetation. The results show that runoff do not present differences between treatments through the period of study. Medium values of sediment yield for all plots vary from 6.70 g L-1 to 57.24 g L-1 showing that the plots which present high protection by vegetation create conditions to diminish the impact of precipitation on the surface.
Highlights
The increase of soil erosion on Cerrado Biome is a real problem to the maintenance of surface equilibrium
For the assessments of fire effects on soil erosion, five plots of 1m2 located in a degraded Cerrado environment were carried out, being differentiated by varying factors such as slope, soil drainage, type and density of vegetation and sediment yield after the action of controlled fire
The data collection period was held from 12 March 2014 to 05 June 2015, and the application of controlled fire occurred on April 16 and November 11 of 2014
Summary
The increase of soil erosion on Cerrado Biome is a real problem to the maintenance of surface equilibrium. A higher amount of studies of fire effects on soil erosion in the Cerrado Biome was carried out after natural fires and a few experimental research use controlled fire to comprehend this process. We can add to this the almost inexistence of studies about this theme on Cerrado Biome, and understand that further research is needed to comprehend how to translate burn severity or fire severity measures and research into useful predictions about soil erosion From this information, the present study aims to understand and quantify the effects of fire on the increase or decrease of the erosive processes with reference to five characteristics of vegetation existing on degraded Cerrado area, based on the assumption that the burning and removal of vegetation that cover of topsoil favors the flow of soil sediment entrainment. Natural vegetation was replaced by pasture and agricultural practices, some areas were abandoned, and a regrowth of natural species creates a mosaic of land uses
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
