عنوان مقاله [English]
Since Bromes tomentellus is one of the most important species in natural ecosystems in Iran both quantitatively and qualitatively, this research investigated decomposition process of Bromes tomentellus through studying dynamism of the main nutrient elements and decomposition rate of leaves and stems of the plantin a period of one year. The litter bag technique with size of 20×20 cm and 2 mm pores was used in this research. Each bag was filled with 5 g dried plant specimens. A totallof 54 bags with leaf, stem, and combination of leaf and stem were placed with three replications in Hosein Abad Research Station. Bags were taken at intervals of 60 days (6 times in a year). The amount of nutrients N, C, K, P, and C/N in leaves, stems, and the combination of leaves and stems were measured after each sampling. The results showed that the percentage of N in leaf was 1.02 which was 0.65 and 0.34 more in comparison with the nitrogen content of stem and the combination of leaf and stem, respectively. Also, annual decomposition constants of leaves, stems, leaves and stems of this species were 1.22, 0.95, and 1.88 respectively.
Alexander, M. (1977). Soil Microbiology, 2nd ed. John Wiley and sons. New York.
Amini, R., Rahmani, R. and Habashi, H. (2012). Dynamics of nitrogen, phosphorus and carbon in litter of Beech trees (Case Study: One series of Shastkalatehs forest of Gorgan). Iranian Journal of Forest and Pine. 19(1): 94-103.
AsghariSorkhi, A. (2013). Impact of Canopy Composition on Litter Decomposition, Nutrient Cycles and Soil Properties in Pure and Mixed Beech Stands. (Case study: Alandan Forest, Sari). MSc thesis, Sari Agricultural Science and Natural Resources University, Sari, Iran.
Barnes, B.V., Zak, D.R., Denton, S.R. and Spurr, S.H. (1998). Forest Ecology. 4th Edition,
John Wiley and Sons, Inc., New York. P 774.
Berg, B., Berg M., Bottner, P., Box, E., Breymeyer, A., Calvo de Anta, R., Coûteaux, M.M., Gallardo, A., Escudero, A., Kartz, W., Maderia, M., Mãlkönen, E., McClaugherty, C., Meentemeyer, V., Muńoz, F., Piussi, P., Remacle, J. and Virzo de santo, A. (1993). Litter mass rates in pine forests of Europe and Eastern United States: some relationships with climate and litter quality. Biogeochemistry. 20: 127-159.
Berg, B. and McClaugherty, C. (2008). Plant litter: Decomposition, Humus Formation, Carbon Sequestration. Springer-Verlag Berlin Heidelberg.
Berg, B. and Staaf, H. (1981). Chemical composition of main plant litter components at Ivantjärnsheden – data from decomposition studies. Swed Configuration For Project Internation Repead. 104: 1–10.
Berg, B., Staaf, H. and Wessén, B. (1987). Decomposition and nutrient release in needle litter from nitrogen fertilizer Scots pine (Pinus sylvestris) stands. Scand Journal of Forest Research. 2: 399–415.
Blair, J.M. (1988). Nutrient release from decomposition foliar litter of three tree-species with special reference to calcium, magnesium and potassium dynamics. Journal of Plant and soil. 110: 49-55.
Corrigan, C. (2008). The Decomposition of Leaf Litter in Litter Traps: Implications on Forest Biogeochemical Cycling. MSc thesis, University of Waterloo, Ontario, Canada.
Delaney, M.T., Fernandez, I.J., Simmons, J.A. and Briggs, R.D. (1996). Red maple and white pine litter quality: initial change with decomposition. University of Maine, Technical bulletin, 162: 19p.
Fraser, L.H. and Hockin, A.D. (2013). Litter decomposition rates of two grass species along a semi- arid grassland –forest ecocline. Journal of Arid Environments. 88: 125-129.
Ghazanshahi, J. (2000). Soil and its relations in agriculture. Kareno Press.
Ghezelsefloo, N., Mahdavi, S.Kh. and Hoseini, S.A. (2012). Study of litter quality of two species Artemisia sieberi & Salsola dendroides and its impact on soil properties in the Teal Abad region of Golestan Province. Journal of Plant Ecophysiology. 4(1): 50-60.
Gray, A.N., Spies T.A. and Easter, M.J. (2002). Microclimatic and soil moisture responses to gap formation in coastal Douglas-fir forests. Canadian Journal of Forest Research. 32: 332–43.
Guo, L.B. and Sims, R.E.H. (1999). Litter decomposition and nutrient release via litter decomposition in New Zealand eucalypt short rotation forests. Agriculture, Ecosystems and Environments. 75: 133-140.
HajiBogloo, A. (2007). Investigation of relationship between litter quality and shoot in the some rangeland species. MSc thesis, Tehran University, Tehran, Iran.
Hope, G.D., Prescott, C.E. and Blevins, L.L. (2003). Responses of available soil nitrogen and litter decomposition to openings of different sizes in dry interior Douglas-fir forests in British Columbia. Forest Ecology Management. 186: 33–46.
Jafari, M. and Rahimzadeh Halagh, N. (2005). A comparison of litter quality and its effect on soil of three rangeland species habituate in Vardavrd region. MSc thesis, Tehran University, Tehran, Iran.
Jacob, M., Viedenz, K., Polle, A. and Thomas, F.M. (2010). Leaf litter decomposition in temperate deciduous forest stands with a decreasing fraction of beech (Fagus sylvatica). Oecologia, 164(4):1083-1094.
Koukoura, Z., Mamolos, A.P. and Kalburtji, K.L. (2003). Decomposition of dominant plant species litter in semi arid grassland. Journal of Soil Ecology. 23: 13-23.
Malakooti, J. and Homaiee, M. (2005). Fertilization of arid and semi-arid areas soils, problems and solutions. Tarbiat Modarres University Press.
Moore, T.R., Trofymow, J.A., Taylor, B., Prescott, C., Camire, C., Duschene, L., Fyles, J., Kozak, L., Krannabetter, M., Morrison, I., Siltanen, M., Smith, S., Titus, B., Visser, S.,Wein, R. and Zoltai, S. (1999). Litter decomposition rates in Canadian forests. Global Change Biology, 5: 75–82.
Moro, M.J. and Domingo, F. (2000). Litter decomposition in Four Woody Species in a Mediterranean Climate: Weight Loss, N and P Dynamics. Annals of Botany. 86: 1065-1071.
Nobakht, F. (2009). Comparison of litter properties of several rangeland species and those effects on soil quality induces. MSc thesis, Tehran University, Tehran, Iran.
Raiesi, F. (1998). Impacts of elevated atmospheric CO2 on litter quality litter-decomposability and nitrogen turnover rate of two oak species in Mediterranean forest ecosystem. Global Change Biology. 4: 667-677.
Rauzi, F. (1975). Seasonal yield and chemical composition of cereal wheat grass in south eastern Wyoming. Journal of Range Management. 28: 219-221.
Romney, E.M. and Wallace, A. (1974). Responses and interactions in desert plants as influenced by irrigation and nitrogen application. US/IBP Desert Desert Biome Research Memorandum RM. 12: 74-17.
Saberi, M. (2010). Comparison amount of minerals in soil and shoot and litter of Bromus tomentellus, Agropyron tauri, Psatyrostachychys fragilis (case study: Taleghan rangelands). MSc thesis, Tehran University, Tehran, Iran.
Yin, X., Perry, J.A. and Dixon, R.K. (1989). Influence of canopy removal on oak forest floor decomposition. Canadian Journal of Forest Research. 19: 204–214.