تأثیر وجین علف هرز بر رشد و عملکرد نهال چهار گونه سوزنی‌برگ در نهالستان

احمدلو, فاطمه; طبری, مسعود; رحمانی, احمد; یوسف‌زاده, حامد

تأثیر وجین علف هرز بر رشد و عملکرد نهال چهار گونه سوزنی‌برگ در نهالستان

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ دانشجوی دکتری جنگلداری، دانشکده منابع طبیعی دانشگاه تربیت مدرس

² نویسنده مسئول، دانشیار گروه جنگلداری، دانشکده منابع طبیعی دانشگاه تربیت مدرس،

³ استادیار پژوهش، موسسه تحقیقات جنگل‌ها و مراتع کشور

چکیده

در این تحقیق وضعیت زنده‌مانی، رشد، زی‌توده و شادابی نهال‌های سوزنی‌برگ سرو نقره‌ای (Cupressus arizonica var. arizonica Green.)، زربین (C. sempervirens var. horizantalis)، کاج بروسیا (Pinus brutia Ten.) و کاج حلب
(P. halepensis Mill.) تحت تأثیر دوره وجین علف هرز و ترکیب تیمارهای خاک و دوره وجین در نهالستان کلوده آمل بررسی شد. برای این منظور، بذرها با چهار تکرار در گلدانهای پلاستیکی با دو دوره وجین 10 روزه و 20 روزه و تیمارهای مختلف خاک شامل 1) خاک شاهد، 2) خاک شاهد و کود دامی (1:1)، 3) خاک شاهد و خاکبرگ (1:1)، 4) خاک شاهد، کود دامی و خاکبرگ (1:1:1) آزمایش شدند. بعد از یک فصل رویش (در هر گونه) پاسخ اغلب صفات اندازهگیری شده نهالهای تولیدی (رشد، زیتوده، کیفیت شادابی و عملکرد تولید نهال) به دوره وجین 10 روزه بهتر از دوره وجین 20 روزه بوده است. زربین در خاک 4 و دوره وجین 10 روزه بیشترین میزان تمام صفات مورد مطالعه را نشان داد. در وجین دوره کوتاهتر (10 روزه) ممکن است دلیل آن کاهش رقابت، تأمین رطوبت و نور، و ذخیره عناصر تغذیهای در بافت گیاه باشد. برای رشد و بقای بهتر، باید نهال‌های سوزنیبرگ مطالعه شده در شرایط محیطی مطلوب و دور از هر گونه رقابت قرار گیرند. بنابراین وجین علف هرز در دوره‌های کوتاهتر (10 روزه) و خاک حاصلخیز توصیه می‌شود.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of weed control on growth and performance of four nursery-grown conifer species

نویسندگان [English]

F. Ahmadloo ¹
M. Tabari ²
A. Rahmani ³
H. Yousefzadeh ¹

چکیده [English]

This research was conducted on the survival, growth, biomass and vitality status of Arizona cypress (Cupressus arizonica var. arizonica Green.), Medite cypress(C. sempervirens var. horizantalis), Brutia pine (Pinus brutia Ten.) and Aleppo pine (P. halepensis Mill.) seedlings subjected to weeding as well as various combinations of organic matter and leaf litter use at Koloudeh nursery, Amol city (north of Iran).). Seeds were planted in plastic pots in a randomized block design with four replications. Two weeding treatments of 10-day (W1) and 20-day (W2) intervals and different treatments include soil 1) control soil 2) control soil+ manure (1:1), 3) control soil + decomposed litter (1:1), 4) control soil + manure + decomposed litter (1:1:1) were applied. The results obtained for each species seedlings following first growing season indicated better response of W1 compare to W2 for most of the characteristics include growth, biomass, vitality and performance. C. sempervirens in no. four soil treatment with 10 day weeding interval, showed the optimal rate of all studies traits. Decreased competition, increased light, nutrient availability could be attributed to shorter weeding interval and successful seedling establishment. Therefore, weed control applied at shorter interval (10-day) during the first growing year combined with fertile soil is recommended.

کلیدواژه‌ها [English]

survival
Cupressus
vitality
Pinus

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