ویژگی‌های فیزیکوشیمیایی خاک 20 سال پس از جنگلکاری در جنگل‌های شمال ایران ‏(با تأکید بر ذخایر کربن و نیتروژن در جنگل‌های دست‌کاشت با گونه‌های سوزنی‌برگ و پهن‌برگ)‏

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دکترای اکولوژی جنگل، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور، ایران

2 استاد، گروه علوم و مهندسی جنگل، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور، ایران‏

3 دانشیار، گروه علوم و مهندسی جنگل، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور، ایران‏

4 استاد، گروه مهندسی آب، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران‏

5 دانش‌آموخته کارشناسی ارشد، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور، ایران

چکیده

این پژوهش در پنج توده دست­کاشت با گونه‌های بلوط، توسکا، افراپلت، صنوبر و زربین در جنگل­های حوزه آبخیز تجن در استان مازندران انجام شد. به­منظور بررسی ویژگی­های فیزیکی و شیمیایی خاک، 10 نمونه خاک در هر توده درختی برداشت و مشخصه­های خاک شامل بافت، اسیدیتۀ خاک، جرم مخصوص ظاهری، هدایت الکتریکی، عناصری چون فسفر، پتاسیم، کلسیم، نیتروژن و کربن خاک اندازه­گیری شد. نتایج پژوهش نشان داد که نوع گونه‌ درختی بر ویژگی­های فیزیکی وشیمیایی خاک اثر­گذار است. آنالیز واریانس یک­طرفه نشان داد که ویژگی­های خاک در توده­های مختلف تفاوت معنی­داری دارند. در این منطقه بیشترین مقدار ذخیره کربن خاک در توده توسکا ( ton ha-161/64) و کمترین مقدار آن در خاک توده صنوبر ( ton ha-176/26) مشاهده شد. مقدار ذخیره نیتروژن نیز در خاک توده توسکا دارای بیشترین مقدار ( ton ha-168/2) و در توده زربین دارای کمترین مقدار ( ton ha-1 17/1) بود. در مجموع می­توان گفت که ذخیره کربن و نیتروژن خاک به­عنوان یک ارزش افزوده در کنار دیگر ارزش­ها و فوائد بوم­سامانه­های جنگلی و به­عنوان شاخصی برای سنجش پایداری بوم­سامانه است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Soil physico-chemical properties 20 years after plantation in the Iranian northern ‎forests (Emphasizing on carbon and nitrogen stocks in plantation with broadleaved and ‎coniferous species)‎

نویسندگان [English]

  • Leila Vatani 1
  • Seyed Mohsen Hosseini 2
  • Seyed Jalil Alavi 3
  • Mahmoud Raeini Sarjaz 4
  • Seyed Saeed Shamsi 5
1 Ph.D. of Forest ecology, Faculty of Natural Resources and Marine Sciences, Tarbiat Modarres University, ‎Noor, I. R. Iran
2 Professor, Department of Forest Science and engineering, Faculty of Natural Resources and Marine ‎Sciences, Tarbiat Modarres University, Noor, I. R. Iran
3 forest department, Faculty of Natural Resources and Marine Sciences, Tarbiat Modarres University, Noor, Mazandaran, Iran.
4 Professor, Department of water engineering, Sari Agricultural Sciences and Natural Resources University, ‎Sari, Noor, I. R. Iran
5 MSc., Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, I. R. Iran
چکیده [English]

This study was conducted to determine carbon and soil nitrogen stocks in five plantations with broadleaved stands including oak, alder, maple and poplar species and a cypress conifer stand in Tajan watershed in Mazandaran province (Sari city). In order to study soil physico-chemical properties, soil samples were taken at a depth of 10 cm in each stand. Soil characteristics including texture, soil acidity, bulk density, electrical conductivity, total nitrogen, organic carbon was measured. The results showed that tree species affect the physicochemical properties of the soil. The highest carbon storage was observed in alder (64/61 ton/ha) and the lowest carbon storage in poplar (26/76 ton/ha). Nitrogen stock had the highest (2/68 ton/ha) and the lowest (1/17 ton/ha) in alder stand. Overall, the results showed that carbon and soil nitrogen storage are as an added value with other values ​​and benefits of forest ecosystems and as an indicator for assessing ecosystem sustainability. Based on plantation and reforestation must be done with broadleaf species that have high potential for atmospheric carbon storage.

کلیدواژه‌ها [English]

  • Forest regeneration
  • soil elements
  • ecosystem
  • natural forest
  • Climate change
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