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مقایسه عناصر شیمیایی تاجبارش و لاشهریزی در تودههای دستکاشت بلندمازو (Quercus castaneifolia C. A. Mey) و کاج رادیاتا (Pinus radiate D. Don) (مطالعه موردی: جنگل‌های چوب و کاغذ مازندران، ساری) | ||
| نشریه جنگل و فرآورده های چوب | ||
| دوره 74، شماره 1، خرداد 1400، صفحه 1-14 اصل مقاله (502.21 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfwp.2021.300521.1094 | ||
| نویسندگان | ||
| اعظم نورایی1؛ حمید جلیلوند* 2؛ سید محمد حجتی3؛ جلیل علوی4 | ||
| 1دکتری جنگل‌شناسی و اکولوژی جنگل، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران | ||
| 2استاد گروه علوم و مهندسی جنگل، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران | ||
| 3دانشیار گروه علوم و مهندسی جنگل، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران | ||
| 4دانشیار گروه جنگلداری، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور، ایران | ||
| چکیده | ||
| عناصر غذایی در زیتوده روزمینی از طریق تاجبارش و لاشهریزی به خاک بر میگردند و از ورودی عناصر غذایی به بوم‌سازگانهای جنگل در مدت طولانی حفاظت میکنند. هدف از این مطالعه، بررسی تغییرات عناصر شیمیایی تاجبارش و لاشهریزی در تودههای دستکاشت بلندمازو (Quercus castaneifolia C. A. Mey) و کاج رادیاتا (Pinus radiate D. Don) بود. بهمنظور اندازهگیری غلظت و ورودی عناصر در تاجبارش، در هر توده 36 عدد جمعآوریکننده تاجبارش نصب شد. ترکیب شیمیایی تاجبارش شامل اسیدیته، هدایت الکتریکی، نیترات، آمونیوم، فسفات و پتاسیم بهصورت فصلی (پاییز، زمستان، بهار و تابستان)، اندازهگیری شد. بهمنظور اندازهگیری ورودی عناصر از طریق لاشهریزی، نیتروژن، فسفر، پتاسیم و کربن به شکل فصلی (پاییز، زمستان، بهار و تابستان) نیز اندازهگیری شد. نتایج نشان داد که غلظت عناصر موجود در تاجبارش در بهار و تابستان بهطور معنیداری (05/0>p) بیشتر از زمستان و پاییز بود. در رابطه با ورودی عناصر بهوسیله تاجبارش نیز میزان ورودی عناصر در توده بلندمازو بیشتر از کاج رادیاتا بود. ورودی عناصر از طریق لاشهریزی نیز در توده بلندمازو بهطور معنیداری (05/0>p) بیشتر از کاج رادیاتا بود. نتایج حاصل از این پژوهش نشان داد که نوع گونه درختی و تغییرات تاجپوشش و فصول مختلف سال میتواند ترکیب شیمیایی و میزان ورودی عناصر را بهوسیله تاجبارش و لاشهریزی در تودههای جنگلی دچار تغییر نماید که در این رابطه گونه بلندمازو تمایل بیشتری به بازگشت عناصر به خاک از طریق تاجبارش و لاشهریزی نشان داد. این نتیجه میتواند توجه مراکز اجرایی را به اهمیّت گونههای بومی در احیاء و بازسازی مناطق تخریب شده جلب نماید. | ||
| کلیدواژه‌ها | ||
| بازگشت عناصر؛ تاجبارش؛ جنگل‌کاری؛ لاشهریزی | ||
| عنوان مقاله [English] | ||
| Comparison changes of chemical elements of throughfall and litterfall in oak (Quercus castaneifolia C. A. Mey) and pine (Pinus radiata D. Don) plantations | ||
| نویسندگان [English] | ||
| Azam Noraiy1؛ Hamid Jalilvand or Djalilvand2؛ Seyed Mohammad Hojjati3؛ Seyed Jalil Alavi4 | ||
| 1Ph.D., Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, I. R. Iran. | ||
| 2Prof., Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, I. R. Iran. | ||
| 3Assoc. Prof., Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, I. R. Iran. | ||
| 4Assoc. Prof., Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, I. R. Iran. | ||
| چکیده [English] | ||
| Nutrients in aboveground biomass return to soil through throughfall and litterfall. The present study was carried out to investigate the seasonal variation concentration and input of chemical throughfall and litterfall nutrients in oak (Quercus castaneifolia) and pine (Pinus radiata) plantations. For the sampling of canopy throughfall, 36 collectors were installed at fixed positions in the forest floor. Throughfall samples were measured seasonally (autumn, winter, spring, summer) for pH, EC, potassium, nitrate, phosphate and ammonium. Litterfall and the soil litter layer were analyzed seasonally (autumn, winter, spring, summer) for N, phosphorus, potassium and carbon. The highest amount of throughfall was in winter and the lowest were in summer. The concentrations of ammonium, potassium and phosphorus were generally higher in the growing season than in the dormant season (p < 0.05). The lower amount of these nutrients was in the winter. The concentration of nitrogen was significantly higher in throughfall of both stands in summer. In relation to the nutrient inputs by throughfall and litterfall in the oak was higher than the pine (p < 0.05). The results of this study showed that the type of tree species and changes of canopy cover and different seasons can change the chemical composition and amount of elemental inputs by throughfall and litterfall in forest ecosystem, and oak species show a greater tendency to return elements to the soil through throughfall and litterfall. This result could draw the attention of executive centers to the importance native species in the restoration and rebuilding of destroyed areas. | ||
| کلیدواژه‌ها [English] | ||
| Nutrient Returns, Throughfall, Plantation, Litterfall | ||
| مراجع | ||
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