تأثیر شرایط نامطلوب رویشگاهی بر غلظت عناصر مختلف برگ و خشکیدگی درختان سرو نقره ای (.Cupressus arizonica G) در جنگل‌کاری فولاد مبارکه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار پژوهش، بخش تحقیقات منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی چهارمحال و بختیاری، سازمان تحقیقات، آموزش و ترویج کشاورزی، شهرکرد، ایران

2 استادیار پژوهش، بخش تحقیقات خاک و آب، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی چهارمحال و بختیاری، سازمان تحقیقات، آموزش و ترویج کشاورزی، شهرکرد، ایران

3 مربی پژوهش، بخش تحقیقات منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی چهارمحال و بختیاری، سازمان تحقیقات، آموزش و ترویج کشاورزی، شهرکرد، ایران

4 مربی پژوهش، بخش تحقیقات آبخیزداری، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی چهارمحال و بختیاری، سازمان تحقیقات، آموزش و ترویج کشاورزی، شهرکرد، ایران

5 کارشناس پژوهشی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی چهارمحال و بختیاری، سازمان تحقیقات، آموزش و ترویج کشاورزی، شهرکرد، ایران

چکیده

    شناخت کافی از نیاز اکولوژیک گونه­های مورد استفاده در جنگلکاری با هدف انطباق هر چه بیشتر آنها با شرایط جدید، نقش مهمی در حفاظت و حمایت از این گونه‏ها و جنگل‌کاری­ها خواهد داشت. مجتمع فولاد مبارکه، 1500 هکتار جنگل مصنوعی با درختان غیربومی، ازجمله سرو نقره­ای ایجاد کرده است. خشکیدگی تدریجی این گونه، باعث بروز مشکلات جدی در پایداری این جنگل شده است. به‌منظور بررسی علل خشکیدگی درختان سرو نقره­ای، مناطق جنگل‌کاری شده با این گونه در سطح جنگل مورد نظر، شناسایی شد. سپس در هر منطقه جنگل‌کاری با این گونه، یک پلات 2000 مترمربعی در نظر گرفته شد. در هر پلات، مشخصات کمی درختان شامل قطر برابر سینه و ارتفاع اندازه­گیری شد. از پنج درخت سالم و ناسالم به نمونه‌های برگ جداگانه برای انجام سنجش‏های شیمیایی تهیه شد. حفر پروفیل خاک در هر پلات و برداشت خاک از زیر تاج درختان از سایر اقدامات انجام شده در این پژوهش بود. نتایج نشان داد که محدودیت­های رویشگاهی از قبیل وضعیت نامناسب خاک و شوری منابع آب، به‌عنوان عوامل اصلی در کاهش جذب عناصر کم‌مصرف و پرمصرف در درختان ناسالم می‌باشند. 

کلیدواژه‌ها


عنوان مقاله [English]

The impact of adverse conditions of site on forest decline and nutrient uptake of cypress (Cupressus arizonica G.) in Mobarakeh Steel Company

نویسندگان [English]

  • H. Jahanbazy Goujani 1
  • Y. Iranmanesh 1
  • A. Mehnatkesh 2
  • F. Haghighian 3
  • R. Raesian 4
  • M. Farzan 5
چکیده [English]

Appropriate knowledge of the species ecological requirements will have an important role in the conservation and protection of the reforestation. Mobarakeh steel company created 1,500 hectares of artificial forest by non native tree species. Cupressus arizonica is one of this species. Tree species decline causing serious problems in this area. Plantation areas of this species were identified toinvestigate the causes of cypress dieback. A plot of 2000 m2 was considered in each area that planted by this species. In addition, quality and quantity characters of all trees in each plot such asdiameter, height and crown diameter and trees health were measured. The leaf samples offive healthy and unhealthy trees were collected separately for analytical measurements. The soil sampling and profiling was performed from the areas under healthy and unhealthy tree canopy in each plot. The results of this investigation showed that there are many limiting factors such as poor soil and water salinity as the main factors in reducing the absorption of micro and macro nutrients in unhealthy trees.

کلیدواژه‌ها [English]

  • plantation
  • Cupressus arizonica
  • nutrient elements
  • Site need
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