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Comparison of wheatgrass (A. intermedium) and tall wheatgrass (A. elongatum) in transpiration viewpoint | ||
| Caspian Journal of Environmental Sciences | ||
| مقاله 5، دوره 5، شماره 1، فروردین 2007، صفحه 41-44 اصل مقاله (161.38 K) | ||
| نویسندگان | ||
| N. Rahimzadeh Halagh1؛ S.H.R. Sadeghi* 2 | ||
| 1Department of Watershed Management Engineering and Department of Rangeland Management Engineering, College of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor | ||
| 2Department of Watershed Management Engineering and Department of Rangeland Management Engineering, College of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor 46414-356, Mazandaran, Iran | ||
| چکیده | ||
| Transpiration, as one of the components of hydrological cycle, has not been paid enough attention yet, while it is necessary for sound utilization of rangelands, mostly located in the arid and semiarid regions. The comparison of the different kinds of rangelands species in terms of transpiration rates provides range managers the required information to achieve optimal forage production for a given input precipitation. The present study is a preliminary comparison in transpiration between two important Iranian rangeland species viz. A. intermedium and A. elongatum. The amounts of daily evapotranspiration from aforesaid species of which 4?5 shoots were initially planted in small polyethylene pots with surface area of 50.27 cm2 in five replicates were measured using weighing technique for a period of 33 days under relatively natural conditions. The amounts of daily transpiration of A. intermedium and A. elongatum were respectively varied from 1.4 to 9.4 and 1.5 to 9.1 milliliter. The results of the statistical analyses showed that there is no a significant difference between the amounts of transpiration for the two species on dry matter basis and therefore, the species may have the same value in rangeland improvement from transpiration point of view. REFERENCES Anderson, M.C. (1981) The geometry of leaf distribution in some south-eastern Australian forests. Agricultural Meteorology, 25‚ 195-205. Calder, I.R. (1978) Transpiration observation from a spruce forest and comparison with predictions from an evaporation model. Journal of Hydrology, 38‚ 33-47. Flerchinger, G.N. and Cooley, K.R. (2000) A ten year water balance of a mountainous semiarid watershed. Journal of Hydrology, 237‚ 86- 99. Gamougoun, N.D., Smith, R.P., Wood, M.K. and Pieper, R.D. (1984) Soil, vegetation and hydrologic responses to grazing management at Fort Stanton, New Mexico. Journal of Range Management, 37(6)‚ 538-541. Kaufmann, M.R. (1985) Annual transpiration in subalpine forests: Large differences among four tree species. Journal of Forest Ecology and Management, 13‚ 235-264. Kirnak, H., Kaya, C., Tas, I. and Higges, D. (2001) The influence of water deficit on vegetative growth. Physiology, fruit yield and quality in eggplants. Journal of Plant Physiology, 27‚ 34-46. Mazandaran Province Fishery Organization, 2004. Potential evaluation of trout aquiculture in Haraz River: climatologic and hydrologic studies, pp. 147. Obrist, D., Verburg, P.S.J., Young, M.H., Coleman, J.S., Schorran, D.E. and Arnone, J.A. (2003) Quantifying the effect of phonology on ecosystem evapotranspiration in planted grassland mesocosms using Ecocell technology. Journal of Agricultural and Forest Meteorology, 118‚ 173-183. Roberts, J. (2000) The influence of physiccal and physiological characteristics of vegetation on their hydrological response. Hydrological Processes, 14‚ 2885-2901. Roberts, J and Rosier, P.T.W. (1993) Physiological studies in young Eucalyptus stands in southern India and derived estimates of forest transpiration. Journal of Agricultural Water Management, 24‚ 103-118. Ryan, M., Bond, B., Law, B., Hubbard, R., Woodruff, D., Cieniala, E. and Kucera, J. (2000) Transpiration and whole-tree conductance in ponderosa pine trees of different heights. Oecologia, 124‚ 553-560. Sadeghi, S.H.R. and Rahimzadeh Halagh, N. (2005) Study on transpiration rates of Vicia villocea and Bromus inermis species. In: XX International Grassland Congress 2005: Proceedings (eds. O’Mara, F.P., Wilkins, R.J., Mannetje, L.T., Lovett, D.K., Rogers, P.A.M. and Boland, T.M.), Ireland, June 26 to July 1, 2005, Wageningen Academic Publishers, pp. 685. Sadeghi, S.H.R. and Rahimzadeh Halagh, N. (2006) Daily transpiration rates of Festuca ovina and Agropyrom intermedium rangeland species, In: Proceedings of 8ICDD, China, Beijing, Feb., 24-28, 2006: p. 63. | ||
| کلیدواژهها | ||
| Transpiration؛ A. elongatum؛ A. intermedium؛ Hydrologic Cycle؛ Range Management؛ Iran | ||
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