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بررسی ارتباط برخی صفات کمی و کیفی مؤثر بر عملکرد کنجد تحت تأثیر نیتروژن، پتاسیم و تنش خشکی | ||
دانش کشاورزی وتولید پایدار | ||
مقاله 2، دوره 28، شماره 2، مرداد 1397، صفحه 15-34 اصل مقاله (1005.4 K) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
اکرم مهدوی خرمی1؛ جعفر مسعود سینکی* 2؛ مجید امینی دهقی3؛ شهرام رضوان2؛ علی دماوندی2 | ||
1رشته زراعت، دانشگاه آزاد اسلامی واحد دامغان، دامغان، ایران | ||
2دانشگاه آزاد اسلامی واحد دامغان، گروه زراعت و اصلاح نباتات، تخصص: فیزیولوژی گیاهان زراعی | ||
3دانشکده کشاورزی شاهد، تخصص: فیزیولوژی گیاهان زراعی | ||
چکیده | ||
چکیده به منظور مطالعه ارتباط صفات کمی و کیفی مؤثر بر عملکرد دانه کنجد در تیمارهای تغذیهای با کودهای شیمیایی، زیستی و نانو و تحت تنش خشکی، آزمایشی به صورت اسپلیت پلات فاکتوریل در قالب طرح پایه بلوکهای کامل تصادفی با سه تکرار انجام شد. فاکتورهای آزمایشی شامل رژیمهای آبیاری به صورت قطع آبیاری در مراحل مختلف رشدی براساس معیار BCH، آبیاری کامل و قطع آبیاری در BBCH 75 و 65، سه نوع کود نیتروژنه شامل نیتروکسین، اوره و ترکیب نیتروکسین با 50 درصد اوره و چهار ترکیب کود پتاسیم به صورت عدم کوددهی به عنوان شاهد، محلولپاشی و کاربرد خاکی نانو کلات پتاسیم (به ترتیب 2 در هزار و 2 کیلوگرم در هکتار) و دی اکسید پتاسیم به میزان 2 لیتر در هکتار بودند. بیشترین عملکرد دانه در آبیاری تا50 درصد دانهبندی در عدم محلولپاشی پتاسیم و استفاده کود زیستی نیتروکسین با میانگین 5/1340 کیلوگرم در هکتار به دست آمد که باعث افزایش حدود 35 درصدی در مقایسه با تیمار شاهد گردید. عملکرد دانه با صفات قطر ساقه، وزن خشک بوته، تعداد کپسول، تعداد دانه در کپسول، وزن هزار دانه و درصد و عملکرد روغن همبستگی مثبت و معنیداری داشت. بین صفات مورفولوژیک و عملکردی همبستگی قابل توجه و معنیدار وجود نداشت. نتایج رگرسیون گام به گام نشان داد که حداکثر اختلاف عملکرد دانه را میتوان به تعداد کل کپسول، وزن هزار دانه، تعداد دانه در کپسول، عملکرد روغن و درصد روغن نسبت داد که 1/99 درصد از تغییرات عملکرد دانه را توجیه میکردند. محلولپاشی نانو کلات پتاسیم در شرایط قطع آبیاری در 50 درصد دانهبندی (معادل BBCH 75) و استفاده از کود زیستی نیتروکسین بالاترین عملکرد دانه در شرایط کشت دوم بعد از گندم را داشت و قابل استفاده برای اقلیمهای خشک و نیمهخشک میباشد. | ||
کلیدواژهها | ||
تجزیه رگرسیونی؛ عملکرد؛ قطع آبیاری؛ کنجد؛ نانو کلات پتاسیم؛ نیتروکسین | ||
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