| تعداد نشریات | 286 |
| تعداد نشریات سازمان | 84 |
| تعداد شماره‌ها | 2,998 |
| تعداد مقالات | 33,579 |
| تعداد مشاهده مقاله | 44,251,360 |
| تعداد دریافت فایل اصل مقاله | 20,622,332 |
تأثیر عملیات پرورشی بر رویش درختان شاخه‌زاد برودار (Quercus brantii Lindl.) (پژوهش موردی: جنگل چگنی خرم‌آباد) | ||
| تحقیقات جنگل و صنوبر ایران | ||
| مقاله 16، دوره 24، شماره 2 - شماره پیاپی 64، تیر 1395، صفحه 365-356 اصل مقاله (208.11 K) | ||
| نوع مقاله: علمی- پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijfpr.2016.106996 | ||
| نویسندگان | ||
| داریوش مهدیفر* 1؛ مهدی پورهاشمی2؛ رضا کرمیان1 | ||
| 1کارشناس ارشد پژوهش، بخش تحقیقات منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی لرستان | ||
| 2دانشیار پژوهش، مؤسسه تحقیقات جنگلها و مراتع کشور | ||
| چکیده | ||
| پژوهش پیش‌رو در بخشی از جنگل‌های شاخه‌زاد برودار (Quercus brantii Lindl.) منطقه چگنی خرم‌آباد با استفاده از عملیات پرورشی تنککردن به‌منظور کاهش رقابت بین جست‌ها در یک جست‌گروه و با هدف انتقال پتانسیل رویشی بر جست‌های برتر انجام شد. این پژوهش برای یک بازه زمانی 16ساله در قالب طرح بلوک‌های کامل تصادفی با چهار تیمار و چهار تکرار طراحی شده است که در این مقاله نتایج چهارساله اول آن ارایه شده است. تیمارهای تنککردن شامل تیمارهای سبک، متوسط و سنگین بودند که در سال اول در این تیمارها به‌ترتیب 10، 20 و 30 درصد سطح مقطع جست‌گروه‌ها تنک شدند و تیمار چهارم بدون تنککردن به‌عنوان شاهد درنظر گرفته شد. در هر جست‌گروه هرساله قطر در ارتفاع نیم‌متر، ارتفاع جست‌ها و دو قطر عمود بر هم جست‌گروه‌ها اندازه‌گیری شد. در پایان چهار سال، با محاسبه رویش‌های قطری و ارتفاعی جست‌ها و همچنین رویش قطر و سطح تاج جست‌گروه‌ها به‌تفکیک تیمار، تأثیر تنککردن بر رویش درختان بررسی و بهترین تیمار مشخص شد. نتایج به‌دست‌آمده نشان داد که تیمار تنککردن سنگین نسبت به تیمارهای دیگر تأثیر مثبت بیشتری بر متغیرهای رویشی درختان داشته است و باعث بهبود ساختار توده جنگلی شده است. | ||
| کلیدواژه‌ها | ||
| تنککردن؛ جست‌گروه؛ رویش؛ زاگرس؛ سطح تاج | ||
| عنوان مقاله [English] | ||
| Effect of thinning on growth of coppice Brant`s oak (Quercus brantii Lindl.) trees (Case study: Chegeni forest of Khorramabad) | ||
| نویسندگان [English] | ||
| Dariush Mehdifar1؛ Mehdi Pourhashemi2؛ Reza Karamian1 | ||
| 1Research Expert, Research Division of Natural Resources, Lorestan Agricultural and Natural Resources Research and Education Center, AREEO | ||
| 2Associate Prof., Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO) | ||
| چکیده [English] | ||
| As the first phase of a 16-year project, this research was carried out in a section of coppice Brant`s oak (Quercus brantii Lindl.) trees in Chegeni, Khorramabad, Lorestan province. We assessed the effect of different thinning treatments on growth of Brant`s oaks during a 4-year period. Three treatments with 3 replications were used including heavy (decreasing 30 percent of basal area), medium (decreasing 20 percent of basal area) and light (decreasing 10 percent of basal area) thinnings. One treatment was considered as control with no intervention. Quantitative characteristics of sample trees were measured prior to thinning. The measurements were repeated during 4 years to calculate the growth values. Based on results, heavy thinning had considerably positive impact on growth of diameter, height and basal area of sprouts as well as on growth of sprout-clumps crown area. It is concluded that thinning operations can improve the unsustainable structural characteristics of young coppice stands within Zagros forests. | ||
| مراجع | ||
|
- Birang, N., Javanshir, A. and Mojtahedi, Y., 1992. Étude et culture de la forêt (translation). University of Tabriz Press, Tabriz, 397p (In Persian). - Cañellas, I., Del Río, M., Roig, S. and Montero, G., 2004. Growth response to thinning in Quercus pyrenaica Willd. coppice stands in Spanish central mountain. Annals of Forest Science, 61(3): 243-250. - Ciancio O., Corona, P., Lamonaca, A., Portoghesi, L. and Travaglini, D., 2006. Conversion of clearcut beech coppices into high forests with continuous cover: A case study in central Italy. Forest Ecology and Management, 224: 235-240. - Connell, M.J., Raison, R.J. and Jenkins, P., 2004. Effects of thinning and coppice control on stand productivity and structure in a silvertop ash (Eucalyptus sieberi L. Johnson) forest. Australian Forestry, 67(1): 30-38. - Cotillas, M., 2008. Effects of increased drought and selective thinning on growth and resprouting of two coexisting mediterranean oaks with contrasting leaf habit (Quercus ilex and Quercus cerrioides). Ph.D. thesis, University of Barcelona, Barcelona, 25p. - Cotillas, M., Sabaté, S., Gracia, C. and Espelta, J.M., 2009. Growth response of mixed mediterranean oak coppices to rainfall reduction; Could selective thinning have any influence on it?. Forest Ecology and Management, 258: 1677-1683. - Ducrey, M. and Toth, J. 1992. Effect of cleaning and thinning on height growth and girth increment in holm oak coppices (Quercus ilex L.). Vegetatio, 99-100: 365-376. - Fani, B., Amani, M., Yousefi, B. and Mardani, F., 2008. Tending of Young Oak Sprout-Clumps in Coppice Forests of Marivan (First Phase). Final Report of Research Project, Published by Research Institute of Forests & Rangelands, Tehran, 39p (In Persian). - Fattahi, M., 1994. Study of Zagros Forests and the Most Important Degradation Factors. Published by Research Institute of Forests and Rangelands, Tehran, 63p (In Persian). - Fattahi, M., 1996. Role of local participation in reclamation of Zagros forests. Proceedings of the First Seminar on Natural Resources Extension, Animal Sciences and Fisheries (Second volume). Published by Ministry of Jahad-e-Agriculture, Tehran, 22-24 (In Persian). - Ffolliott, P.F., Farah, M.H. and Gottfried, G.J., 2003. Growth and volume of Emory oak coppice 10 years after thinning: A case study in southeastern Arizona. Western Journal of Applied Forestry, 18(2): 77-80. - Gautam, S., Hasenauer, H. and Pietsch, S.A., 2009. Comparison of Growth Response to Thinning in Oak Forests Managed as Coppice with Standards and High Forest. Geophysical Research Abstracts (Volume 11), 7936p. - Jazirehi, M.H. and Ebrahimi Rostaghi, M., 2003. Silviculture in Zagros. University of Tehran Press, Tehran, 560p (In Persian). - Khodakarami, Y., Pourhashemi, M., Khanhassani, M., Safari, H., Tavakkoli, A., Mehrjoei, A. and Pourreza, M., 2014. Effect of Thinning on Development of Brant`s Oak (Quercus brantii) Sprout-clumps in Forests of Kermanshah Province. Final Report of Research Project, Published by Research Institute of Forests & Rangelands, Tehran, 32p (In Persian). - Liu, Z., Fang, Sh., Liu, D., Yu, M. and Tang, L., 2011. Influence of thinning time and density on sprout development, biomass production and energy stocks of sawtooth oak stumps. Forest Ecology and Management, 269: 299-306. - Marvie Mohadjer, M.R., 2005. Silviculture. University of Tehran Press, Tehran, 387p (In Persian). - Mehdifar, D., Pourhashemi, M. and Karamian, R., 2014. Impact of thinning on quantitative characteristics of Brant`s oak (Quercus brantii Lindl.) in Khorram Abad Forests. Iranian Journal of Forests and Poplar Research, 22(2): 358-367 (In Persian). - Shipek, D.C. and Ffolliott, P.F., 2005. Management of thinned Emory oak coppice for multiple resource benefits. USDA Forest Service Proceedings. RMRS-P-36: 545-546. - Shipek, D.C., Ffolliott, P., Gottfried, G.L. and DeBano, L.F., 2004. Transpiration and Multiple Use Management of Thinned Emory Oak Coppice. Published by USDA Forest Service, Rocky Mountain Forest and Range Experiment, Research Paper RMRS-RP-48, 8p. - Soleimani, N., Fereiduni, S. and Derikvand, B., 2005. Vegetation map of Lorestan. Final Report of National Plan, Published by Forests, Range and Watershed Managemnt Organization of Iran, Tehran, 157p (In Persian). | ||
|
آمار تعداد مشاهده مقاله: 794 تعداد دریافت فایل اصل مقاله: 473 |
||