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اثر آبیاری و سایه بر زیتوده، سطح برگ و شادابی نهال تادار (Celtis caucasica Willd.) | ||
پژوهش و توسعه جنگل | ||
مقاله 5، دوره 4، شماره 3، آذر 1397، صفحه 331-345 اصل مقاله (518.4 K) | ||
نوع مقاله: علمی - پژوهشی | ||
نویسندگان | ||
اسعدی فاطمه1؛ وحید اعتماد2؛ غلامحسین مرادی* 3؛ اصغر سپهوند4 | ||
1کارشناسی ارشد جنگلداری، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران. | ||
2دانشیار، گروه جنگلداری و اقتصاد جنگل، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران. | ||
3استادیار، دانشکده منابع طبیعی و کویرشناسی، دانشگاه یزد، یزد، ایران | ||
4دکتری جنگلداری، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران، ایران. | ||
چکیده | ||
این پژوهش با هدف بررسی اثر تیمارهای مختلف آبیاری و نور بر زیتوده اندام هوایی و ریشه، سطح برگ و شادابی نهال تادار انجام شده است. ابتدا 30 اصله درخت تادار در جنگلهای اطراف روستای شوراب استان لرستان انتخاب شدند و از جهتهای مختلف آن بذرگیری شد. سپس در اواخر آبان اقدام به کاشت بذر در گلدانها شد و بذرها در اوایل فروردین سال بعد جوانه زدند و پس از آن گلدانها تا اوایل تیرماه هرروز آبیاری شدند. بعد از آن چهار تیمار آبیاری (هرروز، دو، سه و چهار روز یکبار) و سه تیمار سایه (نور کامل، نیمسایه و سایة کامل) با سه تکرار و 30 گلدان در هر تکرار (در مجموع 1080 واحد آزمایشی) بهمدت پنج ماه بر روی آنها اعمال شد. سپس طول، عرض و سطح برگها، زیتودة ریشه، زیتودة اندام هوایی و شادابی نهالها اندازهگیری شد و با استفاده از تجزیه واریانس چندطرفه و مدل آزمایش اسپلیت، دادهها مورد تحلیل قرار گرفت. نتایج نشان داد که اثرهای متقابل سایه و آبیاری بر زیتوده، طول و عرض برگ معنیدار است (05/0p<). آبیاری در حالت نور کامل اثر معنیداری بر شادابی نهالها دارد، اما در نیمسایه و سایة کامل این اثر معنیداری نیست و همچنین با کاهش نور دریافتی شادابی نهالها کاسته میشود. با توجه به نتایج، میتوان استنباط کرد که رشد و شادابی نهالها در نور کامل مطلوبتر از دیگر تیمارهای سایه است و سطوح بالای نور برای رشد گونه تادار اهمیت دارد. | ||
کلیدواژهها | ||
تنش خشکی؛ تنش نوری؛ جنگلهای غرب؛ شادابی نهال؛ تادار | ||
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