تأثیر سن توده دست‌کاشت توسکا ییلاقی بر ترسیب کربن خاک

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد مهندسی جنگل، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

2 دانشیار، گروه علوم و مهندسی جنگل، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

3 استادیار، گروه علوم و مهندسی جنگل، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

4 دکتری جنگلداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

چکیده

تاکنون پژوهشی در خصوص اثر سن درختان روی ویژگی­های خاک و همچنین ترسیب کربن در خاک انجام نشده است، بنابراین هدف از اجرای این پژوهش بررسی اثر سن توده دست­کاشت توسکا ییلاقی روی برخی ویژگی­های خاک و ترسیب کربن آن بود. سه توده جنگلکاری 25، 30 و 35 ساله توسکا ییلاقی واقع در پارسل­ها شش و هفت جنگل شصت­کلاته انتخاب شد. برای بررسی ویژگی­های کمی درختان قطر و ارتفاع تمام درختان با استفاده از روش آماربرداری صددرصد ثبت شد. در هر یک از توده‌ها قطعات­نمونه با ابعاد 20×20 متر با استفاده از روش منظم-تصادفی با ابعاد شبکه 50×50 متر پیاده شد. سپس در هر قطعه نمونه از عمق 15-0 سانتی­متر با استفاده از روش استوانه فلزی نمونه خاک تهیه شد. نتایج نشان داد که بیشترین مقدار رطوبت خاک (44/2±49/45 درصد) و کمترین مقدار چگالی ظاهری (02/0±36/1 گرم بر سانتی­متر مکعب) در توده 35 ساله مشاهده شد. بیشترین مقدار pH (01/0±59/7) و کمترین مقدار هدایت الکتریکی (02/0±71/0 دسی­زیمنس بر متر) در توده 35 سال مشاهده شد. بیشترین و کمترین مقدار درصد نیتروژن کل خاک و همچنین ترسیب کربن به­ترتیب در توده­های 35 و 25 سال مشاهده شد. نتایج تجزیه به مؤلفه­های اصلی نشان داد که توده 35 ساله با دو توده دیگر تفاوت دارد؛ از این­رو می­توان بیان کرد که توده توسکا ییلاقی در این سن نیز توانایی بالایی در ترسیب کربن خواهد داشت.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of alder plantation age on soil carbon sequestration

نویسندگان [English]

  • Mazaher alazmani 1
  • Seyyed Mohammad Hojati 2
  • Seyed Mohammad Waez-Mousavi 3
  • Mahya Tafazoli 4
1 M.Sc. Student Forestry, Sari Agricultural Sciences and Natural Resources University, Sari. I.R. Iran
2 Associate Professor, Department of Forestry, Sari Agricultural Sciences and Natural Resources University, ‎Sari, I.R. Iran
3 Assistant Professor, Department of Forestry, Gorgan University of Agricultural Sciences and Natural ‎Resources, Gorgan, I.R. Iran
4 Ph.D. in Forestry, Department of Forestry, Sari Agricultural Sciences and Natural Resources University, ‎Sari, I.R. Iran
چکیده [English]

There had been no study about the effect of the plantations’ age on the properties of forest soils and soil carbon sequestration. Therefore, the aim of this study was to investigate the effect of an alder plantation’s age on some soil properties and carbon sequestration. Three alder plantation stands (25, 30, and 35 years old) located in Parcels No. 6 and 7 in Shastkolateh forest were selected. In order to investigate the quantitative characteristics of trees, the diameter and height of all trees were recorded using the full inventory method. In each stand, 20 × 20 m sample plots were considered using a systematic random method with a 50 × 50 m grid. A soil sample was then taken at the depth of 0-15 cm in each plot using the core method. The result showed that the 35-year-old stand had the highest soil moisture (45.49%±2.44) and the lowest bulk density (1.36 g/cm2±0.02). The highest pH (7.59 ±0.01) and the lowest EC (0.71±0.02 dS/m) were observed in the 35-year-old stand. The highest and lowest percentages of total soil nitrogen as well as carbon sequestration were observed in the 35- and 25- year- old stands, respectively. The results of component analysis showed that the 35-year-old stand was different from the other two stands; hence, it can be stated that alder plantation stands will have a high capacity for carbon sequestration at this age.

کلیدواژه‌ها [English]

  • Climate change
  • Nitrogen fixation
  • Plantation
  • soil properties
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