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مقایسۀ بارانربایی تودههای طبیعی راش شرقی و دستکاشت پیسهآ در فصل رویش در منطقۀ کلاردشت | ||
| نشریه جنگل و فرآورده های چوب | ||
| مقاله 5، دوره 67، شماره 4، اسفند 1393، صفحه 585-594 اصل مقاله (810.47 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfwp.2015.53080 | ||
| نویسندگان | ||
| پریسا عباسیان1؛ پدرام عطارد* 2؛ سید محمد حجتی3 | ||
| 1دانشجوی کارشناسی ارشد، گروه جنگلداری و اقتصاد جنگل، دانشکدۀ منابع طبیعی، دانشگاه تهران، کرج، ایران | ||
| 2دانشیار گروه جنگلداری و اقتصاد جنگل، دانشکدۀ منابع طبیعی، دانشگاه تهران، کرج، ایران | ||
| 3استادیار گروه جنگلداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران | ||
| چکیده | ||
| این تحقیق برای برآورد مقدار بارانربایی (I) دورۀ رویش در تودۀ طبیعی راش شرقی و دستکاشت پیسهآ واقع در منطقۀ کلاردشت صورت گرفت. مقدار بارندگی (GR) با استفاده از چهار جمعآوریکنندۀ باران در منطقۀ باز اندازهگیری شد و برای جمعآوری تاجبارش (TF)، 20 جمعآوریکننده به‌صورت تصادفی در سطح هر توده نصب شد. مقدار بارانربایی از تفاوت بارندگی و تاجبارش برآورد شد. در طول 5 ماه از دورۀ رویش (تیر تا آذرماه 1391)، 13 رخداد بارندگی با عمق تجمعی 8/319 میلیمتر اندازهگیری شد. از این مقدار، سهم بارانربایی راش و پیسهآ به‌ترتیب 8/84 و 5/155 میلیمتر بود. متوسط درصد بارانربایی در هر بارندگی در تودههای راش و پیسهآ به‌ترتیب 5/26 و 6/48 بهدست آمد. نتایج این تحقیق نشان داد بین بارانربایی و بارندگی در هر دو توده همبستگی مثبت و توانی (راش 9/0r2= و پیسهآ 8/0 r2=) وجود دارد. بین درصد بارانربایی %)( ((I:GRو بارندگی نیز در هر دو توده رابطۀ لگاریتمی و کاهنده (تودۀ راش، 8/58 + (GR)ln15/9- =(I:GR)% ،66/0 =r2 و تودۀ پیسهآ، 49/91 + (GR)ln28/12- = (I:GR)% ،51/0 =r2) مشاهده شد. نتایج نشان میدهد میزان آب رسیده به کف جنگل در تودۀ راش بیشتر از تودۀ پیسهآ است که نشان میدهد جایگزینی پیسهآ با راش میتواند بر چرخۀ آبی حوضههای آبخیز تأثیر داشته باشد. آگاهی از مقدار بارانربایی گونههای غیر بومی همچون پیسهآ، که برای احیای جنگلهای مخروبۀ خزری استفاده میشوند، در کنار سایر عوامل انتخاب یک گونه، به‌طور مثال تعرق، امری ضروری و مهم است. | ||
| کلیدواژه‌ها | ||
| بارانربایی؛ پیسهآ؛ تاجبارش؛ راش شرقی؛ کلاردشت | ||
| عنوان مقاله [English] | ||
| Rainfall Interception in a Natural Stand of a Fagus orientalis and a Picea abies Plantation within the Growing Season in Kelardasht Region, North of Iran | ||
| نویسندگان [English] | ||
| Parisa Abbasian1؛ Pedram Attarod2؛ Seyed Mohammad Hojjati3 | ||
| 1MSc. Student, Department Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj, I.R. Iran | ||
| 2Associate Professor, Faculty of Natural Resources, University of Tehran, Karaj, I.R. Iran | ||
| 3Assistant Professor, Sari University of Agricultural Sciences and Natural Resources, Sari, I.R. Iran | ||
| چکیده [English] | ||
| The aim of this study was to compare rainfall interception (I) in a natural forest of Fagus orientalis L. with a neighboring Picea abies plantation in Kelardasht area, the Caspian forests, North of Iran. To measure gross rainfall (GR), four manual collectors were installed in an open area adjacent to the forest sites and throughfall (TF) was measured using 20 collectors randomly located underneath of stands. I was calculated as the difference between GR and TF. Measurements were made from July to November, 2012. During the measurement, 13 rainfall events were recorded with a cumulative depth of 319.8 mm. Cumulative depth of I for F. orientais and P. abies were 84.4 mm and 155.5 mm, respectively. On the event-based measurements, average (I:GR)% in F. orientais and P. abies stands were found to be 26.5% and 48.6%, respectively. Positive power correlations were observed between I and GR in both stands (r2F. orientalis: 0.9; r2P. abies: 0.8). Results showed logarithmic correlations between I and (I:GR)% in F. orientais and P. abies forests ( r2F. orientalis = 0.66, (I:GR)% = -9.15ln(GR) + 58.8.; r2P. abies = 0.51, (I:GR)%= -12.28ln(GR) + 91.49). The greater amount of water reaches the forest floor in F. orientalis suggests that the planting of P. abies relative to F. orientalis will have a significant impact on the hydrological cycle of the watershed. Estimating I, along with the transpiration of species, is necessary to consider while selecting the adapted species for reforestation in the derelict areas of the Caspian forests. | ||
| کلیدواژه‌ها [English] | ||
| Fagus orientalis Lipsky, Kelardasht, Picea abies, Rainfall interception, Throughfall | ||
| مراجع | ||
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