عنوان مقاله [English]
In this research, Eldarican pine (Pinus eldarica Medw.) pure stands with two densities were sampled along with a mixed stand with river red gum (Eucalyptus camaldulensis Dehnh.) in a systematic randomized design. Quantitative traits of trees including diameter at breast height (dbh), height and crown diameters were measured, followed by calculating the basal area, volume, stability index, crown area and annual increment of quantitative variables. In addition, qualitative traits including forking, twisting and trunk decay were also recorded for each tree. Analysis of variance (ANOVA) and Duncan tests were applied to analyze data and compare groups. Results indicated a significant difference between stands for all traits except for height and mean height increment. Furthermore, the mixed stand was superior in dbh and its mean annual increment, basal area and its increment, volume and its increment, stability and crown area. Branchless trunk of trees was significantly longer in pure dense stand compared to the others. Most forking and twisting was seen in mixed stand, yet the highest decay was observed for the pure dense stand. Finally, the study concluded that a mixed scenario should be preferred for Eldarican pine due to its better usage of the site capacity, in particular by owing to the fact that mixed stands are considered to be of more sustainability from an environmental and landscape management perspective.
- Amoroso, M.M. and Turnblom, E.C., 2006. Comparing productivity of pure and mixed Douglas-fir and western hemlock plantations in the Pacific northwest. Canadian Journal of Forest Research, 36(6): 1484-1496.
- Bielak, K., Dudzinska, M. and Pretzsch, H., 2014. Mixed stands of Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst) can be more productive than monocultures evidence from over 100 years of observation of long-term experiments. Forest Systems, 23(3): 573-589.
- Dehghan Chenari, M., 2007. Effect of pure and mixed plantations of conifer-broadleaves on soil specifications and biodiversity in Shahid Paidar Park, Ardakan. M.Sc. thesis, Faculty of Natural Resources, Tarbiat Modares University, Noor, 68p (In Persian).
- Del Rio, M. and Sterba, H., 2009. Comparing volume growth in pure and mixed stands of Pinus sylvestris and Quercus pyrenaica. Annals of Forest Sciences, 66(5): 502-513.
- Forrester, I.D., 2014. The spatial and temporal dynamics of species interactions in mixed-species forests: From pattern to process. Forest Ecology and Management, 312: 282-292.
- Gamfeldt, L., Snäll, T., Bagchi, R., Jonsson, M., Gustafsson, L. and Kjellander, P., 2013. Higher levels of multiple ecosystem services are found in forests with more tree species. Nature Communications, 4: 1-8.
- Jalali, Gh.A., Hosseini, S.M., Akbarinia, M. and Ashkiki, B., 2003. Comparative investigation of pure and mixed plantations of poplar about qualitative and quantitative wood production. Pejouhesh & Sazandegi, 16(1): 82-88 (In Persian).
- Kabiri Koupaei, K., Marvie Mohadjer, M.R., Zahedi Amiri, Gh., Namiranian, M. and Etemad, V., 2009. A comparison on the quantitative and qualitative morphological characteristics of beech (Fagus orientalis Lipsky) in a pure and mixed stand (Gorazbon district, north of Iran). Iranian Journal of Forest and Poplar Research, 17(3): 422-435 (In Persian).
- Khalkhali, S.M., 1999. Investigation of interaction between soil specifications and plants in two plantations of Atriplex cansens. M.Sc. thesis, Faculty of Natural Resources, University of Tehran, Karaj, 245p (In Persian).
- Kiaee, M., 2014. Investigation on wood properties of Eldar pine (Pinus eldarica Medw) and its relations to soil chemical and physical characteristics (in western of mazandarn province plantation). Iranian Journal of Wood and Paper Science Research, 29(2): 199-207 (In Persian).
- Kiani, B., 2014. Applying Modern Statistics in Natural Resources. Yazd University Press, Yazd, 522p (In Persian).
- Kume, B., Kumer, S.S. and Fisher, R.F., 1998. Intercropping teak with Leucaena increases treeg rowth and modifies soil characteristics. Agroforestry Systems, 42(6): 81-89.
- Land S.B., Roberts S.D. and Duzan H.W., 2004. Genetic and Spacing Effects on Loblolly Pine Plantation Development through Age 17. Thechnical Report SRS-71, Published by U.S.D.A., Forest Service, Southern Research Station, Asheville, 413-419.
- Lyapova, L., 1989. Growth of mixed quercus frainetto plantation. Gorsko-Sstopansvo, 45(6): 3-4.
- Mohammadi, J., Shataee, Sh. and Namiranian, M., 2014. Comparison of quantitative and qualitative characteristics of forests structure and composition in natural and managed forest stands (Case study: Shast Kalate forests of Gorgan). Journal of Wood and Forest Science and Technology, 21(1): 65-83 (In Persian).
- Peters, S. and Becker, G., 1995. Die Holzqualitat weitstanding and Engstanding erwachsener stieleichen all gemeine. Forstzeit Schrift, 50: 716-717 (In German).
- Piotto, D., Viquez, P., Montagnini, F. and Kanninen M., 2004. Pure and mixed forest plantations with native species of the dry tropics of Costa Rica: a comparison of growth and productivity, Forest Ecology and Management, 190: 359-372.
- Pretzsch, H., Del Rı´o, M., Ammer, Ch., Avdagic, A., Barbeito, I., Bielak, K., Brazaitis, G., Coll, L., Dirnberger, G., Dro¨ssler, L., Fabrika, M., Forrester, D.I., Godvod, K., Heym, M., Hurt, V., Kurylyak, V., Lof, M., Lombardi, F., Matovic, B., Mohren, F., Motta, R., den Ouden, J., Pach, M., Ponette, Q., Schutze, G., Schweig, J., Skrzyszewski, J., Sramek, V., Sterba, H., Stojanovic, D., Svoboda, M., Vanhellemont, M., Verheyen, K., Wellhausen Zlatanov, T. and Bravo-Oviedo, A., 2015. Growth and yield of mixed versus pure stands of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) analysed along a productivity gradient through Europe. European Journal of Forest Research, 134(5): 927-947.
- Roohi Moghaddam, A., Hosseini, S.M., Ebrahimi, A., Rahmani, A. and Tabari, M., 2007. The effect of mixing rates on qualitative and quantitative characteristics of oak-zelkova plantation. Pajouhesh & Sazandegi, 77: 155-168 (In Persian).
- Sayyad, E., Hosseini, S.M., Mokhtari, J. and Mahdavi, R., 2006. Comparison of growth and qualitative specifications of pure and mixed stands of Popolus deltoids and Alnus glutinosa. Pajouhesh & Sazandegi, 71: 2-10 (In Persian).
- Soheili Esfahani, S. and Fallah, A., 2014. Investigation of quantitative and qualitative specifications of Populus alba L and Populus nigra L. in plantations of west Isfahan. Forest and Wood Products, 67(2): 233-244 (In Persian).
- Toupin, R., Filip, G., Erkert, Th. and Barger, M., 2008. Field Guide for Danger Tree Identification and Response. Published by U.S.D.A., Forest Service, Pacific Northwest Region, USA, 68p.
- Wonn, H.T., 2001. Height: diameter ratios and stability relationships for four northern Rocky mountain tree species. Western Journal of Applied Forestry, 16(2): 87-94.
- Yiqing, L., Ming, X., Zou, X., Peijun, S. and Yaoqi, Z., 2005. Comparing soil organic carbon dynamics in plantation and secondary forest in wet tropics in Puerto Rico. Global Change Biology, 11: 239-248.
- Zobeiri, M., 1999. Forest Inventory. University of Tehran Press, Tehran, 401p (In Persian).