بررسی ذخیره کربن خاک در پارک جنگلی لویزان تهران

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی دکتری جنگلداری، گروه جنگلداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه ارومیه

2 دانشیار گروه جنگلداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه ارومیه، ارومیه، ایران

3 استاد، گروه جنگلداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه ارومیه، ارومیه، ایران

4 دانشیار گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه گیلان

5 دکتری جنگلداری ، اداره منابع طبیعی شهرستان مهاباد

6 استادیار گروه جنگلداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه ارومیه

چکیده

این پژوهش در شش جنگلکاری شامل کاج تهران و سروسیمین (خالص سوزنی­برگ)، اقاقیا و ون (خالص پهن­برگ) و اقاقیا-ون و اقاقیا-سرو سیمین (آمیخته) در پارک جنگلی لویزان انجام شد. مقادیر کربن ذخیره­شده در خاک اندازه­گیری و رابطه بین برخی از خصوصیات فیزیکی و شیمیایی با مقدار کربن آلی خاک بررسی شد. در60 نمونه خاک جمع­آوری­شده از دو عمق 0-10 و 10-30 سانتی­متری این جنگلکاری­ها اسیدیته­، بافت، جرم مخصوص ظاهری، جرم مخصوص حقیقی و درصد کربن آلی اندازه­گیری شد. نتایج نشان داد که بیش­ترین و کم­ترین مقدار کربن ذخیره­شده در هر دو عمق خاک به­ترتیب مربوط به تیپ­های کاج تهران و ون است. مقدار ذخیره کربن در خاک همه زمین­های­ جنگلکاری­شده در عمق پایین (10-30 سانتی­متر) بیشتر بود. بیشترین مقدار ذخیره کربن در هر دو عمق مورد بررسی در جنگلکاری­های خالص سوزنی­برگ و پهن­برگ به­ترتیب در تیپ­ کاج و اقاقیا و در جنگلکاری­های آمیخته، در تیپ اقاقیا-سرو سیمین مشاهده شد. همچنین نتیجه رگرسیون گام­به­گام نشان داد که در بین ویژگی­های فیزیکی-شیمیایی خاک، اسیدیته، جرم مخصوص ظاهری و رس و در بین مشخصات کمی درختان، قطر برابرسینه، ارتفاع و قطر تاج مهم­ترین عوامل تأثیرگذار بر مقدار کربن آلی خاک در منطقه مورد بررسی هستند.

کلیدواژه‌ها


عنوان مقاله [English]

The study of soil carbon storage in Lavizan Forest Park, Tehran

نویسندگان [English]

  • maryam mahmoudi 1
  • Elias Ramezani Kakroudi 2
  • Abbas Banj Shafiei 3
  • Ali Salehi 4
  • Majid Pato 5
  • Omid Hoseinzadeh 6
1 Ph.D. Student of Forestry, Department of Forestry, Faculty of Agriculture and Natural Resources, Urmia University
2 Associate Professor, Department of Forestry, Faculty of Agriculture and Natural Resources, Urmia University, Urmia, I.R. Iran
3 Professor, Department of Forestry, Faculty of Agriculture and Natural Resources, Urmia University, Urmia, I.R. Iran
4 Associate Professor of Forestry, Department of Forestry, Faculty of Natural Resources, Gilan University, Gilan, I.R. Iran
5 Ph.D. of Forest Sciences, Expert of Natural Resources and Watershed Management Department of Mahabad, I.R. Iran
6 Assistant Professor, Department of Forestry, Faculty of Agriculture and Natural Resources, Urmia University, Urmia, I. R. Iran
چکیده [English]

This study was performed in six plantations including Pinus eldarica and Cupressus arizonica (pure coniferous), Robinia pseudoacacia and Fraxinus sp. (pure broadleaved) along with R. pseudoacacia-Fraxinus and R. pseudoacacia-C. arizonica (mixed) in Lavizan Forest Park. Soil carbon stock was measured and the relationship between some physico-chemical properties of soil with organic carbon was examined. Soil acidity, texture, bulk density, particle density and percentage organic carbon were measured in 60 soil samples collected from 0-10 cm and 10-30 cm depths under the plantations. According to the results, the maximum and minimum soil carbon stocks in both depths were seen in Pinus eldarica and Fraxinus types, respectively. In all plantations under consideration, carbon storage was greater at lower, i.e. 10-30 cm, soil depth. In both studied soil depths, the highest carbon storage in pure coniferous and hardwood types was respectively observed in P. eldarica and R. pseudoacacia plantations and among mixed types in R. pseudoacacia-C. arizonica type. Also, stepwise regression showed that of physic-chemical soil properties, pH, bulk density and clay and of  quantitative characteristics of trees, DBH, hight and crown diameter were the most important factors affecting soil organic carbon in the study area.

کلیدواژه‌ها [English]

  • Global warming
  • Plantation
  • Semi-arid areas
  • Soil carbon storage
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