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اثر تیمارهای پوششدهی بذر بر سبزشدن و رشد گیاهچه کلزا و رشد قارچهای بیمارگر | ||
علوم و تحقیقات بذر ایران | ||
مقاله 8، دوره 5، شماره 3، مهر 1397، صفحه 103-115 اصل مقاله (1.44 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22124/jms.2018.2938 | ||
نویسندگان | ||
شیرین تقی ذوقی1؛ الیاس سلطانی* 2؛ ایرج اله دادی2؛ رضا صادقی2 | ||
1دانشجوی کارشناسی ارشد | ||
2عضو هیات علمی دانشگاه تهران | ||
چکیده | ||
این تحقیق بهمنظور بررسی اثر تیمارهای پوششدهی بذر بر استقرار گیاهچه کلزا در شرایط شاهد، تنش شوری و خشکی و رشد قارچهای بیمارگر، در پردیس ابوریحان دانشگاه تهران در سال 1395 انجام شد. به این منظور بذرهای کلزا (رقم نپتون) در 10 تیمار مختلف پوششدهی شدند (T1 تا T10) که از لحاظ نوع پرایمینگ، نوع پوشش و مصرف قارچکش تفاوت داشتند. کمیسازی سبزشدن بذرهای پوششدار شده با کمک مدل چاپمن- ریچاردز صورت گرفت و مقایسه تیمارها با کمک پارامترهای مدل انجام شد. نتایج نشان داد که تیمارهای بذری که در آنها بذرها با هیومیک اسید پرایمینگ شده بودند (T3، T6 و T9)، سرعت و درصد سبزشدن بهتری در هر سه شرایط داشتند. در شرایط شاهد بیشترین وزن خشک گیاهچه مربوط به تیمار T3 (077/0 گرم) و T9 (074/0 گرم) بود که در آنها بذرها با هیومیک اسید پرایم شده بودند. تیمار حبهکردن بذر با قارچکش بیشترین اثر بر کاهش رشد قارچهای بیمارگر داشت و هر سه قارچ مورد مطالعه کمترین رشد قارچ را در شرایط حبهکردن و مصرف قارچکش داشتند. بهطورکلی، نتایج این تحقیق نشان داد که شرایط تنش موجب اثرات منفی بر سبزشدن و رشد گیاهچه کلزا گردید که استفاده از تیمارهای بهبود بذر و پوششدهی تا حدی توانست این اثرات را تخفیف دهد. در مجموع، در میان تیمارهای مورد مطالعه، حبهکردن بذر به همراه قارچکش و کاربرد هیومیک اسید بهصورت پرایمینگ (یعنی T6) بهترین تیمار بود. | ||
کلیدواژهها | ||
بهبود بذر؛ کمیسازی سبزشدن؛ مواد جاذب رطوبت | ||
مراجع | ||
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