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بررسی اثر عصاره ورمیکمپوست و تنش خشکی بر شاخصهای جوانهزنی نخود (Cicer arietinum L.cv. Pirouz) | ||
علوم و تحقیقات بذر ایران | ||
مقاله 6، دوره 3، شماره 1، فروردین 1395، صفحه 75-86 اصل مقاله (661.03 K) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
سعید رضا حسینزاده1؛ حمزه امیری* 1؛ احمد اسماعیلی2 | ||
1گروه زیستشناسی دانشکده علوم دانشگاه لرستان، خرمآباد، ایران | ||
2گروه زراعت و اصلاح نباتات دانشکده کشاورزی دانشگاه لرستان، خرم آباد، ایران | ||
چکیده | ||
عصاره کود ورمیکمپوست بهدلیل ساختار متخلخل، ظرفیت نگهداری آب بالا، تنظیم کنندههای رشد گیاهی و وجود مقادیر بالای عناصر غذایی پرمصرف و کم مصرف، میتواند تأثیر تنشهای مختلف را بر گیاهان کاهش دهد. در این راستا بهمنظور بررسی برهمکنش سطوح مختلف عصاره آبی ورمیکمپوست و تنش خشکی بر شاخصهای جوانهزنی نخود آزمایشی بهصورت فاکتوریل در قالب طرح کاملاً تصادفی با چهار تکرار در دانشگاه صنعتی خاتمالانبیاء بهبهان در سال 1393 انجام شد. عوامل مورد بررسی شامل عصاره ورمیکمپوست در چهار سطح (0، 5، 10 و 20 درصد حجمی) و تنش خشکی در چهار سطح (0، 3/0- ، 6/0- و 9/0- مگاپاسکال) بود. تنش خشکی توسط پلیاتیلنگلایکول 6000 اعمال شد. عصاره ورمیکمپوست در تیمار خشکی 3/0- مگاپاسکال توانست برخی شاخصهای جوانهزنی مورد بررسی را بهبود دهد، بهطوریکه سطح 10 درصد عصاره بیشترین میزان درصد جوانهزنی (66/63 درصد)، طول ریشهچه (31/4 سانتیمتر)، سطح 20 درصد بیشترین میزان وزن خشک ساقهچه (6/50 میلیگرم) و سطح 5 درصد بیشترین میزان وزن خشک ریشهچه (89 میلیگرم) را در مقایسه با سطح شاهد داشتند. در تیمارهای 6/0- و 9/0- مگاپاسکال، عصاره ورمیکمپوست به جز وزن خشک ریشهچه نتوانست کاهش شاخصهای جوانهزنی را که در اثر تنش خشکی ایجاد شده بود، جبران کند. در حالت کلی پژوهش حاضر نشان داد که کاربرد عصاره ورمیکمپوست در مرحله جوانهزنی در سطوح بالای تنش خشکی تأثیر معنیداری ندارد اما در تنشهای خشکی ملایم (3/0- مگاپاسکال) مؤثر است. | ||
کلیدواژهها | ||
آندوسپرم مصرفی؛ پلیاتیلنگلایکول؛ درصد جوانهزنی؛ سرعت جوانهزنی | ||
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