Allometric relationship between some morpho-physiological characteristics of corn under different tillage systems and sowing dates

Document Type : Full Article

Authors

Department of Crop Production and Plant Breeding, College of Agriculture, Shiraz University, Shiraz, I. R. Iran

Abstract

ABSTRACT- Field experiments were conducted to determine the relationship between plant leaf area as the dependent variable with leaves number, leaf dry weight, and total vegetative components dry weight and plant height as the independent variables. Treatments were two tillage systems (conventional and no-tillage) as main plots, and seven sowing dates (11 May, 18 May, 25 May, 1 June, 8 June, 15 June and 22 June) as sub plots. This research was carried out at the Research Farm of Shiraz University during 2014 and 2015 growing seasons.  The interaction between sowing date and tillage system was significant. The highest leaf area, leaf number, leaf dry weight, total dry weight and plant height were obtained in earlier sowing dates (11 May, 18 May, 25-May and 1-Jun) in both tillage systems and the lowest were obtained in the latest sowing date (22 Jun) in no-tillage in both years. Using polynomial equation for determining algometric relationship between leaf area and vegetative characteristics showed a significant relationship between leaf area with leaf number (R2=0.96 and R2=0.98), leaf dry weight (R2=0.98 and R2=0.98), total vegetative components dry weight (R2=0.96 and R2=0.96) and finally plant height (R2=0.98 and R2=0.95). These allometric relationships contribute to a better understanding of plant growth and development in corn, which is necessary for optimal management of the crop and for genetic improvement.

Keywords

Article Title [Persian]

رابطه آلومتریک بین برخی صفات مورفوفیزولوژیک ذرت تحت تاثیر سیستم‏ های خاکورزی و تاریخ کاشت

Authors [Persian]

  • سارا زارع مهذبیه
  • حسین غدیری
  • محسن عدالت
  • سیدعبدالرضا کاظمینی
گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه شیراز، شیراز ، ج. ا. ایران
Abstract [Persian]

چکیده-آزمایشی مزرعه ای به منظوربررسی رابطه میان سطح برگ ذرت با تعداد برگ˛وزن خشک برگ وزن خشک کل اجزای رویشی و ارتفاع بوته انجام شد. تیمارها شامل دو سیستم خاکورزی ( خاکورزی متداول و بی خاکورزی) و هفت تاریخ کشت ( 21 اردیبهشت˛ 28 اردیبهشت˛ 4 خرداد˛ 11خرداد˛ 18 خرداد˛ 25خردادو 1 تیر) بود. این مطالعه درمزارع تحقیقاتی دانشکده کشاورزی دانشگاه شیراز در سالهای زراعی 94-93 انجام شد. اثر برهمکنش میان تاریخ کشت و سیستم خاکورزی معنی داربود و در هر دو سال بیشترین سطح برگ˛تعدادبرگ˛وزن خشک برگ˛وزن خشک کل اجزای رویشی و ارتفاع بوته درتاریخ کشت های زود هنگام درهردو سیستم کشت و کمترین مقدار آن ها درآخرین تاریخ کشت (1 تیرماه) و درسیستم بی خاکورزی مشاهده شد.به منظور تعیین روابط آلومتری بین سطح برگ و صفات رویشی از معادله پلی نومیال استفاده شد که نتایج رابطه معنی داری را بین سطح برگ وتعداد برگ (R2=96/0 و R2= 98/0)˛ وزن خشک برگ (R2=98/0 و R2= 98/0)˛ وزن خشک کل اجزای ر ویشی (R2=96/0 و R2= 96/0) و ارتفاع بوته (R2=96/0 و R2= 96/0) نشان داد. ازروابط آلومتری می توان در جهت درک بهتر رشد و نمو ذرت که لازمه مدیریت بهینه گیاه زراعی وبهبود وضعیت ژنتیکی آن است استفاده کرد.

Keywords [Persian]

  • واژه‏های کلیدی:
  • آلومتری
  • تعداد برگ
  • سطح برگ
  • وزن خشک

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Iran Agricultural Research
Volume 37, Issue 2
December 2018
Pages 1-8

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