اثر جنگلکاری خالص و آمیخته توسکای ییلاقی (Alnus subcordata C. A. Mey.) و صنوبر دلتوئیدس (Populus deltoides Marsh.) بر ترسیب کربن و برخی ویژگیهای فیزیکی و شیمیایی خاک

نوع مقاله: علمی- پژوهشی

نویسندگان

1 کارشناسی ارشد جنگل‌داری، گروه جنگل‌داری، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس

2 استاد، گروه جنگل‌داری، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس

3 دانشیار پژوهش، مؤسسه تحقیقات جنگلها و مراتع کشور

4 کارشناس ارشد، بخش تحقیقات منابع طبیعی، مرکز تحقیقات کشاورزی و منابع طبیعی استان مازندران

چکیده

در پژوهش پیش‌رو به بررسی اثر جنگل­کاری­های خالص و آمیخته توسکای ییلاقی (.Alnus subcordata C. A. Mey) و صنوبر دلتوئیدس (Populus deltoides Marsh.) بر ترسیب کربن و برخی ویژگی­های فیزیکی و شیمیایی خاک پرداخته شده است. این توده­ها در سال 1375 در قالب طرح آزمایشی بلوک­های کامل تصادفی در پنج تیمار مختلف درجات آمیختگی، خالص توسکای ییلاقی و خالص صنوبر دلتوئیدس و چهار تکرار کاشته شدند. نمونه ­برداری خاک در دو عمق صفر تا 15 و 15 تا 30 سانتی­متر انجام شد. نتایج نشان داد که بین میزان کربن ترسیب شده در هر دو عمق خاک در تیمارهای مورد بررسی اختلاف معنی­ داری وجود ندارد. سایر ویژگی­های خاک به‌جز اسیدیته در عمق صفر تا 15 سانتی­متر در تیمارهای مختلف دارای اختلاف معنی­ داری نبودند. همچنین بین درصد کربن آلی خاک با درصد نیتروژن همبستگی مثبت و با وزن مخصوص ظاهری خاک و نسبت C/N هبستگی منفی مشاهده شد. نتایج پژوهش پیش‌رو نشان داد که تیمار توسکای خالص و تیمارهایی که حضور توسکا در آنها بیشتر است با وجود عدم تفاوت معنی‌دار، تأثیر مثبتی بر ویژگی­های خاک داشته ­اند، هرچند دستیابی به نتایج بهتر مستلزم گذشت زمان بیشتری است.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of pure and mixed Caucasian alder (Alnus subcordata C. A. Mey.) and eastern cottonwood (Populus deltoides Marsh.) plantations on carbon sequestration and some physical and chemical soil properties

نویسندگان [English]

  • Pari Karami-Kordalivand 1
  • Seyyed Mohsen Hosseini 2
  • Ahmad Rahmani 3
  • Jamshid Mokhtari 4
1 Department of Forest Science, Faculty of Natural Resources and Marine Science, Tarbiat Modares University
2 Prof., Department of Forest Science, Faculty of Natural Resources and Marine Science, Tarbiat Modares University
3 Associate Prof., Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO)
4 Senior Research Expert, Research Division of Natural Resources, Mazandaran Agricultural and Natural Resources Research Center, AREEO
چکیده [English]

This study investigated effects of pure and mixed plantations of Caucasian alder (Alnus subcordata C. A. Mey.) and eastern cottonwood(Populus deltoides Marsh.) on carbon sequestration and some physical and chemical soil properties. The stands across the test site were planted in 1996 under randomized complete blocks design at four replications and five treatments at Chamestan Forest Station. The treatment consisted of five pure and mixed eastern cottonwoodand Caucasian alder stands (pure eastern cottonwood, pure Caucasian alder, mixed Caucasian alder and eastern cottonwoodstands at three different levels: 50+50 %, 33+67 % and 67+33 %, respectively). Combined soil samples were taken at two depths including 0-15 and 15-30 cm. The results showed no significant difference in carbon sequestration rates amongst the treatments at both soil depths , except for pH which was significantly different at soil surface layer (P<0.05). There was a significant (P< 0.01) positive correlation between organic carbon and nitrogen, whereas negative correlations were observed between soil organic carbon and soil bulk density and carbon to nitrogen ratio. Furthermore, presence of Caucasian alder species showed positive effect on the amount of carbon and other soil properties. However, longer term investigations are required to achieve better results.

کلیدواژه‌ها [English]

  • Acidity
  • Climate change
  • Organic carbon
  • carbon to nitrogen ratio
  • nitrogen
  • soil bulk density
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