Stratification Ratio of Soil Organic Matter and Aggregate Stability under Fire in Semi-steppe Rangelands in Chaharmahal and akhtiari

Document Type : Research Paper

Authors

1 Former MSc Student, Shahrekord University. Soil Science Department

2 Assistant Professor, Shahrekord University. Soil Science Department

3 Professor, Shahrekord University. Soil Science Department

4 Assistant Professor, Shahrekord University. Rangeland and Watershed Management Department, Faculty of Natural Resource and Earth Science

Abstract

Stratification ratio of soil organic matter and aggregate stability are considered as indicators of soil quality under different conditions such as burning rangeland vegetation. The objective of this study was toinvestigate the impact of fire on stratification ratio of soil organic matter and aggregate stability and distribution of organic matter in two macro and micro fractions in semi-steppe rangeland of Karsanak region in Chaharmahal and Bakhtiari province. Several sites which were affected by fire three, two, and one years before this study (i.e. 2008, 2009, and 2010, respectively) were chosen. Since the soil samples were taken from two depths (0-10 cm and 15-25 cm) of each site with 9 replications, the numbers of soil samples for laboratoryanalysis were 108. Independent t-test (P= 5%) was used to assess the difference between the measured properties at the burned and control sites. The results showed that the soil organic matter and mean weight diameter of aggregates (MWD) in the surface layer decreased significantly in 1 and 2 years after fire. Particulate organic matter (POM) significantly decreased in surface layer of the burned areas compared with the control areas. The effects of fire on stratification ratio of soil organic matter in 1- and 2-years after fire were significant compared with control areas, and stratification of soil organic matter decreased 26% and 22 percent in 1 and 2 years after fire, respectively.Stratification ratio of aggregate stability was lower in all burned areas compared with control areas, but the differences were not significant. Macro organic matter of both surface and subsurface layers in 1 year after fire was significantly reduced compared with the control,while, micro organic matter of subsurface layer showed significant increase. The study results showed that theeffect of fire on physical and chemical soil properties in the surface layer were more than subsurface layer, because of higher-severity fire in surface layer. Furthermore, due to reduction of organic matter and aggregate stability after fire, rangeland soil quality decreased.

Keywords

References

  1. Balesdent, J., Chenu, C. and M. Balabane. 2000. Relationship of soil organic matter dynamics to physical protection and tillage. Soil and Tillage Research. 53:215-230.
  2. Cambardella, C.A. and E.T. Elliott. 1993. Carbon and nitrogen distributions in aggregates from cultivated and grassland soils. Soil Science Society of America Journal. 57:1071-1076.
  3. Cambardella, C.A., and E.T. Elliott. 1992. Particulate soil organic-matter changes across a grassland cultivation sequence. Soil Science Society of America Journal. 56:777-782.
  4. Certini, G. 2005. Effects of fire on properties of forest soils: a review. Ecological. 143:1-10.
  5. DeBano, L.F., Neary, D.G., and P.F. Ffolliott. 1998. Fire effects on ecosystems. Wiley, New York.
  6. Franzluebbers, A.J. 2002. Soil organic matter stratification ratio as an indicator of soil quality. Soil and Tillage Research. 66:295–106.
  7. Franzluebbers, A.J., Schoemberg, H.H., and D.M. Endale. 2007. Surface-soil responses to paraplowing of long-term no-tillage cropland in the Southern Piedmont USA. Soil and Tillage Research. 96:303–315.
  8. Giovannini, G., Lucchesi, S., and M. Giachetti. 1988. Effects of heating on some physical and chemical parameters related to soil aggregation and erodibility. Soil Sci 146:255–261.
  9. Granged, A.J.P., Zavala, L.M., Antonio, J., and B.G. Moreno. 2011. Post-fire evolution of soil properties and vegetation cover in a Mediterranean heathland after experimental burning: A 3-year study. Geoderma. 164:85–94.
  10. Gregorich, E.G., and M.H. Beare. 2008. Physically uncomplexed organic matter. In: M.R. Carter and E.G. Gregorich (eds). Soil sampling and methods of analysis. 2nd ed. Canadian Society of Soil Science. Pp. 607-609.
  11. Gregorich, E.G., Carter, M.R., Angers, D.A., Monreal, C.M., and B.H. Ellert. 1997. Towards a minimum data set to assess soil organic matter quality in agricultural soils. Journal of Soil Science. 74:367–385.
  12. Haubensak, K., Antonio, C.D., and D. Wixon. 2009. Effect of fire and environmental variables and composition in grazed salt desert shrub lands of the Great Basin (USA). Journal of Arid Environments. 73:643-650.
  13. Hubbert, K.R., Preisler, H.K., Wohlgemuth, P.M., Graham, R.G., and M.G. Narog. 2006. Prescribed burning effects on soil physical properties and water repellency in a steep chaparral watershed, Southern California, USA. Geoderma. 130:284–298.
  14. Jastrow, J.D., Boutton, T.W. and R.M. Miller. 1996. Carbon dynamics of aggregate-associated organic matter estimated by carbon-13 natural abundance. Soil Sci. Soc. Am. J. 60:801-807.
  15. Kayode, S.A., Gabriel, A., Oluwatosin, O., Adeyolanu, D., and O. Adebayo. 2008. Slash and burn effect on soil quality of an Alfisol: Soil physical properties. Soil and Tillage Research. 103:4–10.
  16. Melero, S., pez-Bellido, R.J., pez-Bellido, L.L., Munoz-Romero, V.N., Moreno, F., Murillo, J.M., and A.J. Franzluebbers. 2012. Stratification ratios in a rainfed Mediterranean Vertisol in wheat under different tillage, rotation and N fertilisation rates. Soil and Tillage Research 119:7–12.
  17. Mesdaghi, M. 2004. Range management in Iran. 2004. Published by Jahad Daneshgahi. 4th Edition, p.334. ISBN: 964-6582-05-2.
  18. Nelson, D.W., and L.E. Sommers. 1996. Total carbon, organic carbon and organic matter. In: D. L. Sparks (Ed.) ,In Methods of soil analysis. part 3: Chemical methods. Soil Science Society of America. Madison Wisconsin. Pp. 961–1011.
  19. Novora, A., Gristina, L., Bodi, M.B., and A. Cerda. 2010. The impact of fire on redistribution of soil organic matter on a Mediterranean hill slope under maquia vegetation type. Land Degradation and Development. 10:102-117.
  20. Oliva, F.G., Sanford, R.L, and E. Kelly. 1999. Effect of tropical deciduous forest soil in Mexico on the microbial degradation of organic matter. Plant and Soil 206:29–36.
  21. Six, J., Conant, R.T., Paul, E.A. and K. Paustian. 2002. Stabilization mechanisms of soil organic matter: implications for C-saturation of soils. Plant and Soil. 241:155-176.
  22. Valzano, F.P., Greene, R.S.B., and B.W. Murphy. 1997. Direct effects of stubble burning on soil hydraulic and physical properties in a direct drill tillage system. Soil and Tillage Research. 42: 209-219.
  23. Wells, C.G., Campbell, R.E., Deano, L.F., Lewis, C.E., Fredriksen, R.L., Franklin, E.C., Froelich, R.C., and P.H. Dunn. 1979. Effects of fire on soil, a state-of-knowledge review. USDA Forest Service, Washington Office, General Technical Report WO-7.
  24. Wuest, S.B., Caesar, T.T.C., Wright, S.F., and J.D. Williams. 2005. Organic matter addition, N, and residue burning effects on infiltration, biological, and physical properties of an intensively tilled silt-loam soil. Soil and Tillage Research. 84:154–167.
  25. Zorita, M.D., and J.H. Grove. 2002. Duration of tillage management affects carbon and phosphorus stratification in phosphatic Paleudalfs. Soil and Tillage Research. 66:165–174.
Iranian Journal of Soil Research
Volume 28, Issue 1
September 2019
Pages 39-51

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