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بهبودجنبه های فیزیولوژیک بذرسیاهدانه (.L sativa Nigella (در خاک آهکی: نقش مقدار فسفر بذر تحت تأثیر تغذیه بوته مادری | ||
| علوم و فناوری بذر ایران | ||
| مقاله 3، دوره 4، شماره 1 - شماره پیاپی 7، فروردین 1394، صفحه 27-38 اصل مقاله (546 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| نویسندگان | ||
| سید محمد سیدی* 1؛ پرویز رضوانی مقدم2؛ محمد خواجه حسینی3؛ حمید شاهنده4 | ||
| 1دانشجوی دکترای اکولوژی گیاهان زراعی | ||
| 2استاد دانشکده کشاورزی دانشگاه فردوسی مشهد | ||
| 3دانشیار دانشکده کشاورزی دانشگاه فردوسی مشهد | ||
| 4استاد گروه علوم خاک و گیاه دانشگاه تگزاس امریکا | ||
| چکیده | ||
| به منظور ارزیابی برخی جنبههای فیزیولوژیک بذر سیاهدانه در واکنش به فراهمی فسفر در خاک آهکی، آزمایشی در سال 92-1391 در مزرعه تحقیقاتی دانشگاه فردوسی مشهد انجام شد. منابع اصلاح کننده خاک آهکی (شامل ورمی کمپوست (V( + باکتری تیوباسیلوس(T ،(گوگرد (S + (T ،T+S+V و شاهد) در کنار سطوح فسفر (صفر، 30 و 60 کیلوگرم در هکتار از منبع فسفات دی آمونیوم) به صورت فاکتوریل در قالب طرح بلوکهای کامل تصادفی به ترتیب عامل اول و دوم آزمایش در نظر گرفته شدند. جهت ارزیابی بنیه بذر در واکنش به تغذیه فسفر در بوته مادری از آزمون REاستفاده شد که طبق نتایج این آزمون، درصد جوانهزنی در روز چهارم به عنوان ارزیابی بنیه بذر سیاهدانه تعیین شد. نتایج نشان داد که کاربرد منابع اصلاح کننده خاک (T+V ،T+S و T+S+V ،(مقدار فسفر در پوسته، درصد فسفر پوسته به کل فسفر بذر و متوسط زمان جوانهزنی را به طور معنیدار کاهش داد. کاربرد T+S+V در مقایسه با شاهد منجر به کاهش مقدارفسفردرپوسته و متوسط زمان جوانهزنی به ترتیب تا 18 ،10 درصد شد. از سویی دیگر، کاربرد تیمارهای ذکر شده منجر به افزایش معنیدار وزن هزار دانه، بنیه بذر، مقدار فسفر در جنین و در بذر شد. بین وزن هزار دانه و غلظت فسفر در پوسته بذر نیز ارتباط منفی وجود داشت R =0/66**) 2 ). به نظر میرسد که در شرایط محدودیت فسفر خاک، گیاه مادری از طریق تخصیص بیشتر فسفر به پوسته، ترجیح میدهد به جای افزایش بنیه، بذرهایی با دوام بالاتر تولید کند. | ||
| کلیدواژهها | ||
| آزمون RE؛ بنیه بذر؛ فسفر بذر؛ متوسط زمان جوانه زنی | ||
| عنوان مقاله [English] | ||
| The improving seed physiological aspects of black seed (Nigella sativa L.) in calcareous soil: Seed phosphorus content affected by mother plant nutrition | ||
| چکیده [English] | ||
| In order to investigate the effects of increasing soluble phosphorus (P) on seed production and quality of black seed (Nigellasativa L.) in a calcareous soil, a field experiment was conducted at Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, in 2013. Field experiment was conducted as factorial layout based on a complete randomized block design with four replications. The fertilizer resources (vermicimpost (V) + Tiobacilus (T), Sulfur (S) + T, V+S+T and control) and three levels of P (0, 30 and 60 kg.ha-1) were the first and second experimental factors, respectively. Seed vigor was also assessed by radicle emergence (RE) test for further evaluation of the effects of P on mother plant on the quality of producing seeds. A germination percentage at day 4 was used as seed vigor test. The resources of soil amendment (V+T, S+T and V+S+T) significantly decreased the P concentration in coat, P percentage of coat to seed and mean germination time. For instance, by applying V+S+T, P concentration in coat and mean germination time were decreased by 18 and 10%, as compared to control treatment.However, 1000 seed weight, seed vigor, P concentration in embryo and seed were significantly increased by applying the resources of soil amendment. There was a significant negative relationship between 1000 seed weight and P concentration in coat (R2= 0.66 **). It seems that under P-deficient conditions in soil, mother plant prefer to produce more longevity seeds, instead to increase theseed vigor, by increasing the P allocation to seed coat | ||
| کلیدواژهها [English] | ||
| Mean Germination Time, seed phosphorus, Radicle emergence (RE) test, Seed vigor | ||
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