اثر دگرآسیب اکالیپتوس و عمق کشت بذر بر ویژگی‌های جوانه‌زنی و رشد اولیه اسپرس
محورهای موضوعی : بوم شناسی گیاهان زراعیستاره باقری 1 , ولی اله رئوفی راد 2 , علی طویلی 3 , محمد جعفری 4
1 - دانشجویان دکتری مرتعداری
دانشگاه علوم کشاورزی و منابع طبیعی ساری
2 - دانشجویان دکتری مرتعداری
دانشگاه علوم کشاورزی و منابع طبیعی ساری
3 - دانشیار دانشکدة منابع طبیعی
4 - استاد دانشکدة منابع طبیعی
دانشگاه تهران
کلید واژه: camaldulensis Eucalyptus, Onobrychis sativa, آللوپاتی, اصلاح مراتع, استقرار گیاهچه,
چکیده مقاله :
چکیده در این پژوهش اثر بازدارندگی اکالیپتوس و عمق کشت بر جوانه زنی و رشد اسپرس در قالب آزمایش فاکتوریل براساس طرح پایه کاملأ تصادفی با چهار تکرار و دو فاکتور مورد بررسی قرار گرفت. فاکتور اول دگرآسیبی در پنج سطح 0، 005/0، 01/0، 02/0 و 03/0% وزنی پودر برگ اکالیپتوس در 1000 گرم خاک و فاکتور دوم عمق کاشت در چهار سطح 5/0 (شاهد)، 5/1، 3 و 5/4 سانتی متر بود. اثر دگرآسیبی، عمق کشت و اثر متقابل آنها بر تمامی صفات به استثنای طول ریشه چه معنی دار بود. اثر دگرآسیب بر وزن خشک اندام هوایی بیشتر از سایر صفات بود. همچنین افزایش عمق کشت منجر به کاهش طول ریشه چه و ساقه چه و سایر صفات رویشی مورد اندازه گیری شد. در مجموع، افزایش میزان دگرآسیبی اکالیپتوس و عمق کشت بر مؤلفه های رشد اسپرس تأثیر منفی داشتند و زمانی که این دو عامل هم زمان لحاظ شدند، تأثیر نامطلوب آنها بیش از زمانی بود که بطور مستقل در نظر گرفته شدند. بنابراین در نظر گرفتن اثرات متقابل آللوپاتی و عمق کشت می تواند نقش تعیین کننده ای در بهینه سازی تولید اسپرس در اراضی دارای اکالیپتوس داشته باشد.
ABSTRACT Inthis study, allelopathic potential of Eucalyptus canaldulensis and sowing depth was studies on germination characteristics and vegetative growth of Onobrychis sativa seedlings using completely randomized design with four replications and two factors. The first factor was aqueous extracts of 1, 2, 3, and 5% of eucalyptus leaf powder in 1000 g of soil and the second factor was sowing depth in four levels including 0.5 as control, 1.5, 3, and 4.5 cm. Effect of allelopathic, sowing depth and their interaction on all traits but root length was significant. Effect of eucalyptus on shoot dry weight was more than other traits. On the whole, increasing in sowing depth had a negative effect on all traits and when allelopathy and sowing depth integrated, their negative effects were more significantly than their sole effects. Therefore, considering of allelopathy and sowing depth could have a determinative role in the eucalyptus growing lands.
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