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آثار غرقابی طولانیمدت خاک بر تبادلات گازی برگ و رشد نهالهای صنوبر دلتوئیدس و دارتالاب | ||
| نشریه جنگل و فرآورده های چوب | ||
| مقاله 3، دوره 67، شماره 4، اسفند 1393، صفحه 563-571 اصل مقاله (852.01 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfwp.2015.53077 | ||
| نویسندگان | ||
| احسان قنبری1؛ مسعود طبری کوچکسرایی* 2 | ||
| 1کارشناس ارشد جنگل‌داری، دانشگاه تربیت مدرس، نور، ایران | ||
| 2دانشیار گروه جنگل‌داری، دانشگاه تربیت مدرس، نور، ایران | ||
| چکیده | ||
| در این پژوهش آثار غرقابی بر ویژگیهای مورفولوژیکی و تبادلات گازی نهالهای صنوبر دلتوئیدس کلن 51/77 و دارتالاب در یک دورة 450 روزه در منطقهای با اقلیم خیلی مرطوب بررسی شد. نهالها تحت شرایط غرقابی 3 سانتیمتر و 15 سانتیمتر بالای سطح خاک و تیمار شاهد (آبیاری بر اساس ظرفیت زراعی خاک) در یک آزمایش صحرایی بررسی شدند. در پایان دوره، زنده‌مانی و رویش ارتفاعی نهالهای دارتالاب تحت تنش غرقابی تغییری نکرد (P<0.01)، اما در صنوبر در تیمار غرقابی عمقی کاهش یافت (P<0.01). تحت تأثیر غرقابی، رویش قطری در گونة دارتالاب افزایش و در صنوبر کاهش یافت. سطح برگ، تجمع زی توده، و تبادلات گازی (فتوسنتز، هدایت روزنه، و تعرق) برگ در هر دو گونه در شرایط غرقابی کاهش یافت. به‌طور کلی، اگرچه در شرایط غرقابی در هر دو گونه در اغلبِ پارامترهای مورفو ـ فیزیولوژی میزانی افت مشاهده میشود، به‌علت رضایت‌بخش‌بودن برخی دیگر از پارامترها همانند زنده‌مانی، رویش ارتفاعی، و زی تودة ساقه در دورة 450 روزه، میتوان انتظار داشت که امکان رویش و ماندگاری هر دو گونه در شرایط غرقابی برای سالهای آینده متصور باشد. | ||
| کلیدواژه‌ها | ||
| تعرق؛ زنده‌مانی؛ سطح برگ؛ فتوسنتز؛ هدایت روزنهای | ||
| عنوان مقاله [English] | ||
| Influences of Prolonged Soil Flooding on Leaf Gas Exchanges and Growth of Populusdeltoides and Taxodiumdistichum Seedlings | ||
| نویسندگان [English] | ||
| Ehsan Ghanbary1؛ Masoud Tabari2 | ||
| 1MSc. in Forestry, Faculty of Natural Resources, Tarbiat Modares University, Noor, I.R. Iran | ||
| 2Associate Professor, Faculty of Natural Resources, Tarbiat Modares University, Noor, I.R. Iran | ||
| چکیده [English] | ||
| The effects of 450-days of flooding on morphological and gas exchanges responses were investigated under controlled conditions for Populus deltoides (colon 77.51) and Taxodium distichum seedlings. Seedlings were subjected to three outdoor treatments: not flooded (control), flooded to 3 cm above the soil surface (shallow flooded), and flooded to 15 cm above the soil surface (deep flooded). Flooding had no significant effect on the height growth and survival of T. distichum seedlings during 450-day period, but survival and height growth of deep flooded seedlings in P. deltoides were decreased. Under flooding conditions diameter growth increased in T. distichum and decreased in P. deltoides. Leaf area and biomass accumulations reduced by flooding in both species. Flooding reduced net photosynthesis, stomata conductance and transpiration in both species. Overall, even though at flooding status in both species some morpho-physiological variables reduced but due to satisfactory of some other variables like survival, height growth and shoot biomass in 450 days of experiment, possibility of growth and survival of seedlings will be excepted. | ||
| کلیدواژه‌ها [English] | ||
| Leaf area, photosynthetic, Stomata conductance, Survival, Transpiration | ||
| مراجع | ||
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