پاسخ آگروفیزیولوژیکی ارقام مختلف ارزن مرواریدی (Pennisetum glaucum L.) به کم‌آبی در شرایط آب و هوایی کرمان

نوع مقاله : علمی پژوهشی

نویسندگان

1 دانشجوی دکتری زراعت، دانشگاه شهید باهنر کرمان، کرمان، ایران.

2 دانشیار پژوهشکده فناوری تولیدات گیاهی، دانشگاه شهید باهنر کرمان، کرمان، ایران

3 استاد پژوهشکده فناوری تولیدات گیاهی، دانشگاه شهید باهنر کرمان، کرمان، ایران

10.30495/jcep.2021.679975

چکیده

تعیین رقم مناسب یکی از عوامل مهم برای به­دست آوردن حداکثر عملکرد، با توجه به شرایط اقلیمی هر منطقه می­باشد. یکی از مهم­ترین تنش­های محیطی خشکی بوده که از طریق تاثیر منفی در طول دوره رشد گیاه، ساختار و فعالیت­های گیاهی را با اختلال مواجه می­سازد. به­منظور بررسی واکنش آگروفیزیولوژیک ارقام مختلف گیاه ارزن مرواریدی (Hybrid 1, Hybrid 2, IP13150, IP13151, IP22269, ICMV5222 و HHVBCTA) به دو سطح آبیاری (100 و 60 درصد ظرفیت مزرعه) آزمایشی به­صورت کرت­های خرد شده و در قالب طرح بلوک­های کامل تصادفی در شرایط آب و هوایی کرمان انجام شد. نتایج نشان داد اثر ساده تیمار آبیاری برای همه صفات و اثر ساده رقم و نیز اثر متقابل آبیاری در رقم به جز در مورد محتوای رطوبت نسبی و شاخص کلروفیل برای سایر صفات مورد بررسی معنی­دار بوده است. کاهش میزان آب آبیاری از 100 به 60 درصد حد ظرفیت مزرعه موجب کاهش معنی­دار میانگین صفات شاخص کلروفیل (87/20 درصد) و محتوای رطوبت نسبی (06/29 درصد) شد. تنش خشکی موجب افزایش محتوای پرولین در ارقام مورد بررسی شد و بیشترین مقدار این صفت در شرایط تنش از رقم HHVBCTA به­دست آمد. همچنین، نتایج نشان داد که بیشترین میانگین ارتفاع بوته، شاخص سطح برگ و عملکرد علوفه تر و خشک در شرایط آبیاری نرمال و تنش به ترتیب مربوط به رقم Hybrid 1 و IP13151 بود. بر طبق نتایج مقایسه میانگین اثر متقابل کمترین و بیشترین درصد کاهش عملکرد علوفه تر به واسطه اعمال تنش خشکی به­ترتیب مربوط به ارقام IP13151 (16/13 درصد) و ICMV5222 (58/61 درصد) بود. به­طورکلی، با توجه به نتایج به­دست آمده ارقام Hybrid 1 و IP13151 به­ترتیب جهت کاشت در شرایط آبیاری مطلوب و تنش در شرایط آب و هوایی کرمان مناسب به نظر می­رسند.

کلیدواژه‌ها


عنوان مقاله [English]

Agro-Physiological Responses of Different Peal Millet (Pennisetum glaucum L.) Cultivars to Water Deficit in Kerman Climatic Conditions

نویسندگان [English]

  • Seyed Nabiladin Fatemi 1
  • Ali Akbar Maghsoodi Mood 2
  • Ghasem Mohammadi Nejad 3
1 Ph.D. student of Agronomy, Shahid Bahonar University of Kerman, Iran
2 Associate Professor of Agronomy, Shahid Bahonar University of Kerman, Iran
3 Professor of Agronomy, Shahid Bahonar University of Kerman, Iran
چکیده [English]

Cultivar selection is one of the most important factors to obtain maximum yield, based on the climatic conditions of each region. Drought is one of the environmental stresses that causes adverse effects on most stages of plant growth, structure and its activities. To investigate the agro-physiological responses of different pearl millet cultivars (Hybrid 1, Hybrid 2, IP13150, IP13151, IP22269, ICMV5222, HHVBCTA) to two levels of irrigation (100% and 60% of field capacity) an split plot experiment based on randomized complete block design was done in Kerman climatic conditions. The results showed that the simple effect of irrigation treatment and also simple effect of cultivar as well as the interaction of irrigation×cultivar were significant for all traits, except for relative water content and chlorophyll index. Decreasing the value of irrigation water from 100% to 60% of field capacity, caused significantly reduction of chlorophyll index (20.87%) and relative humidity content (29.06%). Drought stress increased proline content in all cultivars and the highest one was obtained from HHVBCTA under this condition. The results showed that the highest values of plant height, leaf area index, fresh and dry forage yield under normal irrigation and also drought stress conditions were obtained from Hybrid 1 and IP13151 cultivars, respectively. According to the comparison results of interaction, the lowest and highest percentage reduction of fresh forage of the due to drought stress were related to IP13151 (13.16%) and Hybrid 2 (61.58%), respectively. Generally, according to the obtained results, Hybrid 1 and IP13151 cultivars are suitable for planting in Kerman climatic region under normal and stress conditions, respectively.

کلیدواژه‌ها [English]

  • Forage yield
  • leaf area index
  • Proline
  • Relative water content
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