ارزیابی رابطه بین تعداد دانه، آب مصرفی در تبخیر تعرق و مقدار آب نسبی برگ با وزن دانه کلزا

نوع مقاله: مقاله پژوهشی

نویسنده

دانشیار، بخش زراعی و باغی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان گلستان، گرگان، ایران

چکیده

به‌منظور بررسی تأثیر آب مصرفی، تعداد دانه و مقدار آب نسبی برگ بر وزن دانۀ کلزا (Brassica napus L.)، آزمایشی به‌صورت اسپلیت پلات در قالب طرح بلوک‌های کامل تصادفی در دو شرایط آبیاری تکمیلی و دیم طی سال‌های 86-1384 انجام گرفت. پنج تاریخ کاشت با فاصلۀ 30 روز در کرت‌های اصلی و دو رقم کلزا (‘هایولا401’ و ‘آرجی­اس003’) در کرت‌های فرعی قرار گرفتند. بین آب مصرفی در فرایند تبخیرتعرق و وزن هزاردانۀ ارقام مورد مطالعه، رابطۀ خطی مثبتی مشاهده شد. آبیاری تکمیلی سبب افزایش معنادار وزن دانه و عملکرد شد. میانگین وزن هزاردانه در شرایط آبیاری تکمیلی و دیم در سال 85-1384 به‌ترتیب 2/3 و 7/2 گرم و در سال 86-1385 به‌ترتیب 2/4 و 7/3 گرم بود. بین وزن هزاردانه با مقدار آب نسبی برگ در 10 روز پس از شروع پر شدن دانه رابطۀ خطی قوی وجود داشت که به‌ترتیب 92 و 84 درصد از تغییرات در ‘هایولا401’ و ‘آرجی­اس003’ را توجیه کرد. به‌ازای هر درصد افزایش آب نسبی برگ، وزن هزاردانه در ‘هایولا401’ و ‘آرجی‌اس003’ به‌ترتیب 191/0 و 146/0 گرم افزایش یافت. روابط قوی بین وزن هزاردانه با آب مصرفی در فرایند تبخیرتعرق و مقدار آب نسبی برگ تحت شرایط محیطی و ارقام مختلف نشان‌دهندۀ اهمیت این صفات در تعیین وزن دانۀ کلزا بود.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation relationships between seed number, used water in evapotranspiration and leaf relative water content with canola seed weight

نویسنده [English]

  • Abolfazl Faraji
Associate Professor, Department of Agronomy and Horticulture, Agriculture and Natural Resources Research and Education Center of Golestan, Gorgan, Iran
چکیده [English]

To study the effects of used water in evapotranspiration, seed number per unit area and leaf relative water content on seed weight of canola (Brassica napus L.), an experiment was conducted as a randomized complete block design, arranged in a split-plot under two conditions, i.e. supplemental irrigation and rainfed in 2005-7. Two cultivars of canola (‘Hyola401’ and ‘RGS003’) as subplots were grown at five sowing dates as main plots, spaced 30 days apart. There was a linear relationship between seed weight and used water in evapotranspiration. Irrigation increased seed weight and seed yield significantly. The mean 1000- seed weight under irrigation and rainfed conditions was 3.2 and 2.7g in 2005-6, and 4.2 and 3.7g in 2006-7. There was a strong linear relationship between seed weight and leaf relative water content, explaining 92 and 84 percent of the variation for ‘Hyola401’ and ‘RGS003’, respectively. For an each percent increase in leaf relative water content, 1000-seed weight of ‘Hyola401’ and ‘RGS003’ increased 0.191 and 0.146g, respectively. The strong relationships of seed weight with used water in evapotranspiration and leaf relative water content, over different environmental conditions and cultivars, showed these variables to be generally applicable in canola seed weight determination

کلیدواژه‌ها [English]

  • Canola
  • Cultivar
  • golestan
  • Rainfall
  • Supplemental irrigation
 

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