اثر محلول پاشی اسیدهیومیک بر برخی صفات آگرومورفولوژیک و رنگیزه های فتوسنتزی دان سیاه تحت تنش خشکی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد،گروه زراعت،دانشکده کشاورزی،دانشگاه شهرکرد،ایران.

2 استادیار،گروه زراعت،دانشکده کشاورزی،دانشگاه شهرکرد،ایران

3 دانشیار،گروه زراعت،دانشکده کشاورزی،دانشگاه شهرکرد،ایران

چکیده

به‌منظور بررسی اثر محلول پاشی اسیدهیومیک بر اثرات تنش خشکی دان‌سیاه (Guizotia abyssinica (L.F) Cass)، آزمایشی به صورت کرت های خرد شده در قالب طرح پایه بلوک های کامل تصادفی در سه تکرار در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه شهرکرد در سال 1395 انجام شد. فاکتور اصلی شامل چهار سطح تنش خشکی (60 (شاهد)، 100، 140 و 180 میلی متر تبخیر از تشتک تبخیر) و فاکتور فرعی شامل چهار سطح اسیدهیومیک (صفر، دو، چهار و شش لیتر در هکتار) بود. نتایج نشان داد سطوح مختلف تنش خشکی و اسیدهیومیک بر صفات ارتفاع بوته، تعداد شاخه فرعی، تعداد طبق در واحد سطح، وزن هزار دانه، عملکرد دانه، عملکرد بیولوژیک، شاخص برداشت، کلروفیل، کاروتنوئیدها و پرولین (در سطح احتمال یک درصد) معنی دار بود. تنش خشکی باعث کاهش و اسیدهیومیک باعث افزایش تمامی صفات به جز پرولین گردید. اثر متقابل تنش خشکی و اسیدهیومیک بر صفات تعداد طبق در واحد سطح، عملکرد دانه، شاخص برداشت و پرولین (در سطح احتمال یک درصد) و بر ارتفاع بوته (در سطح احتمال پنج درصد) معنی دار شد. بیش ترین ارتفاع بوته، تعداد طبق در واحد سطح، عملکرد دانه و شاخص برداشت در تیمار بدون تنش خشکی و شش لیتر در هکتار اسیدهیومیک بدست آمد و بیش ترین مقدار پرولین در تیمار 180 میلی متر تبخیر و بدون اسیدهیومیک مشاهده شد. توصیه می شود جهت سود اقتصادی بیشتر، از رژیم تبخیری 100 میلی متر و اسیدهیومیک با کاربرد 4 لیتر در هکتار استفاده شود.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of foliar application of humic acid on some agromorphological traits and photosynthetic pigments of Niger under drought stress

نویسندگان [English]

  • Tahere Shahmirzaee jeshvaghani 1
  • Mohammad Rafieiolhossaini 2
  • Abdolrazagh Danesh Shahraki 2
  • Ali Tadayyon 3
1 M.Sc.Student,Department of Agronomy,Faculty of Agriculture, Shahrekord University, Shahrekord,Iran
2 Assistant Professor,Department ofAgronomy,Faculty of Agriculture ,Shahrekord University, Shahrekord,Iran.
3 Associate Professor,Department of Agronomy,Faculty of Agriculture,Shahrekord University, Shahrekord,Iran.
چکیده [English]

In order to investigate the effect of humic acid foliar application on drought stress effects of Niger (Guizotia abyssinica (L.F) Cass), a split plot experiment was done in a randomized complete block design with three replications at the research farm of the faculty of agriculture/Shahrekord University in 2016. The main factor consisted of four drought stress levels (60 (control), 100, 140 and 180 mm evaporation from evaporation pan) and the sub factor was including four humic acid levels (0, 2, 4 and 6 liters per hectare). The results showed that the effect of drought stress and humic acid was significant on plant height, number of lateral branches, number of head per unit area, 1000 grain weight, grain yield, biological yield, harvest index, chlorophyll, carotenoids and proline (at 1% level of probability). Drought stress caused decreasing and humic acid caused increasing in all traits except of proline. The interaction effect of drought stress and humic acid on number of head per unit area, grain yield, harvest index, proline (at 1% level of probability) and on plant height (at 5% level of probability) was significant.The maximum plant height, number of heads per unit area, grain yield and harvest index were obtained at control with six liters humic acid application per hectare, and the maximum amount of proline was observed at the treatment of 180 mm evaporation with no humic acid application. It is recommended to use 100 mm evaporation regime with 4 liters humic acid application per hectare for more economic profit.

کلیدواژه‌ها [English]

  • Chlorophyll
  • Grain yield
  • harvest index
  • proline
  • thousand grain weight

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