تأثیر کود بر صفات رویشی نهال‌‌های صنوبر دلتوئیدس (Populus deltoides Marsh) و میزان ابتلا به آفات و بیماری‌‌های آن‌ها در نهالستان کیاشهر

نوع مقاله: علمی- پژوهشی

نویسنده

استادیار، بخش تحقیقات جنگل‌ها و مراتع، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان گیلان، سازمان تحقیقات، آموزش و ترویج کشاورزی، رشت، ایران

چکیده

کاشت و توسعه نهال‌‌های تندرشد صنوبر که علاوه‌بر ویژگی‌‌های مناسب چوبی در برابر عوامل خسارت‌‌زای زنده نیز مقاومت نشان دهند، گامی مهم در تولید چوب و فراورده‌‌های چوبی است. فراهم کردن بستر مناسب برای تغذیه نهال‌‌ها در خزانه، گام بعدی است که با حاصلخیز کردن خاک تحقق می‌‌یابد. هدف از پژوهش پیش‌رو، مشخص کردن مقدار مناسب کود شیمیایی موردنیاز خزانه‌‌های صنوبر بود که به دو صورت کامل (NPK) و ناقص (N) و با بررسی صفات رویشی و نیز مقاومت نهال‌ها در برابر عوامل خسارت‌‌زای زنده در پایان فصل رویش ارزیابی شد. این پژوهش در یکی از نهالستان‌‌های شهرستان کیاشهر در مورد 663 نهال از کلن Populus deltoides 69/55 در قالب بلوک‌‌های کامل تصادفی در پنج تیمار انجام شد. براساس نتایج، کوددهی به‌‌‌رغم افزایش رشد ارتفاعی نهال‌‌ها، سبب افزایش شیوع بیماری لکه‌‌برگی نیز شده بود. در مورد شیوع آفات نیز هیچ‌گونه اختلافی بین تیمارهای مختلف مشاهده نشد، بنابراین با توجه‌ به عواقب نامناسب مصرف بی‌‌رویه کود شیمیایی، کودپاشی در چنین نهالستان‌‌هایی توصیه نمی‌‌شود.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of fertilizer on vegetative traits of Populus deltoides Marsh. saplings and the rate of their resistance to pests and diseases in Kiashshahr nursery

نویسنده [English]

  • Masoud Amin Amlashi
Assistant Prof., Forests and Rangelands Research Department, Guilan Agricultural and Natural Resources Research and Education Center, AREEO, Rasht, Iran
چکیده [English]

In addition to industrially-compatible wood characteristics and resistance to pests and other threatening factors, plantation and development of the poplar saplings is important for production of wood products. Providing a suitable bed for feeding saplings is the next step that will be commonly achieved by fertilization in the nurseries. The purpose of this study was to determine the amount of chemical fertilizer needed for poplar nurseries, which was evaluated in complete (NPK) and incomplete (N) forms and by examining vegetative traits, as well as their resistance and sensitivity to biological disturbance agents at the end of the growth season. For this purpose, the study investigated 663 individuals of Populus deltoides 69/55 clone in randomized complete block design by five treatments in a nursery in Kiashahr, Guilan province. Statistical analysis showed that despite increasing sapling growth, fertilizer also increased the incidence of leaf spot disease. There was no disagreement on the prevalence of pests as a result of the use of fertilizers. Therefore, given the adverse consequences of the use of fertilizer, fertilizer in those nurseries is not recommended.

کلیدواژه‌ها [English]

  • Biological damage
  • fast growing trees
  • Guilan province
  • Soil fertility
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