اثر محلـول پاشی اسید هیـومیک، آهن و روی بر برخی ویژگی های گیـاه روغنی دان سیاه (Guizotia abyssinica L )
محورهای موضوعی : اکوفیزیولوژی گیاهان زراعی
علی تدین
1
(دانشیار گروه زراعت، دانشکده کشاورزی، دانشگاه شهرکرد، شهرکرد، ایران)
صدیقه بهشتی
2
(دانشجوی کارشناسی ارشد گروه زراعت، دانشکده کشاورزی، دانشگاه شهرکرد، شهرکرد، ایران)
کلید واژه: عملکرد روغن, شاخص برداشت, کود زیستی, دان سیاه, عناصر پر و کم مصرف,
چکیده مقاله :
یکی از نیازهای مهم در برنامه‌ریزی زراعی ارزیابی سیستم‌های مختلف تغذیه‌ای گیاه است. با اعمال روش صحیح تغذیه گیاه می‌توان ضمن حفظ محیط زیست، کارایی نهاده‌ها را نیز افــزایش داد. به منظور بررسی اثر محلول پاشی کودهای آلی و ریز مغذی بر برخی خصوصیات گیاه روغنی دان سیاه، آزمایشی به صورت بلوک های کامل تصادفی در سه تکرار در مزرعه تحقیقاتی دانشگاه شهرکرد در سال زراعی 93-1392 اجرا شد. تیمارهای آزمایشی شامل شاهد (عدم مصرف کود)، سه سطح اسید هیومیک (1، 3 و 6 لیتر در هکتار)، آهن (4 در هزار) و روی (4 در هزار) بودند. در این آزمایش صفات ارتفاع بوته، قطر ساقه، تعداد شاخه فرعی، عملکرد بیولوژیک، عملکرد دانه، شاخص برداشت و درصد و عملکرد روغن و پروتئین مورد بررسی قرار گرفتند. نتایج نشان داد محلول پاشی این مواد افزایش معنی دار کلیه صفات مورد بررسی را در پی داشت. عملکرد روغن با افزایش 63 و 53 درصدی به ترتیب با کاربرد 6 لیتر اسید هیومیک و روی نسبت به کاربرد 1 لیتر در هکتار مشاهده شد که برآیند افزایش عملکرد و افزایش درصد روغن می‌باشد. ضمناً بیشترین درصد پروتئین در تیمار ٦ لیتر در هکتار مشاهده گردید. بیشترین پاسخ صفات ابتدا به کاربرد 6 لیتر در هکتار اسید هیومیک و سپس با محلول پاشی روی حاصل شد که بیانگر محدودیت جذب و احتمالاً کمبود این عناصر در خاک مورد آزمایش است.
One of the most important needs in farm planning is the evaluation of different systems of plant nutrition. By supplying the correct way of plant nutrition you can preserve the environment and increase efficiency of agricultural inputs. In order to investigate the effect of foliar application of organic fertilizers and micronutrients on some characteristics of neger, a field experiment was conducted in a complete randomized block design with three replications at Agricultural Research Station of Shahrekord University in 2013-2014. Treatments consisted of control, three levels of humic acid (1, 3, and 6 liters/ha of humic acid, iron (4 per thousand), and zinc (4 per thousand). In this experiment traits like plant height, stem diameter, stem branch number, biological yield, seed yield, harvest index, and percent and oil yield were evaluated. The results showed that foliar application of these materials resulted in significant increase in the traits under study. Oil yield increased by 63 and 53 percent with the use of 6 liters humic acid and zinc respectively, as compared to the use of 1 liter per hectare. This may be the outcome of increased in oil yield and protein content. Meanwhile, the highest percentage of protein observed for tratment of 6 liters per hectare. The highest response of traits firstly obtained by use of 6 liters per hectare humic acid and then from spraying plants with the zinc which shows its limited absorption and/or probably the lack of this element in the soil where the experiment was conducted.
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