مطالعه فراتحلیلی تاثیر تنش خشکی بر عملکرد و اجزای عملکرد پنبه در ایران

نوع مقاله: علمی پژوهشی

نویسندگان

1 دانشجوی دکتری زراعت، واحد کرج، دانشگاه آزاد اسلامی، کرج، ایران

2 استاد گروه زراعت، واحد کرج، دانشگاه آزاد اسلامی، کرج، ایران.

3 استادیار گروه زراعت، واحد کرج، دانشگاه آزاد اسلامی، کرج، ایران

4 دانشیار اگرواکولوژی، پژوهشکده علوم محیطی، دانشگاه شهید بهشتی، ایران

5 دانشیار گروه زراعت، واحد کرج، دانشگاه آزاد اسلامی، کرج، ایران

10.30495/jcep.2020.676136

چکیده

پژوهش‌های مربوط به ارزیابی تاثیر نهاده‌ها روی پنبه در کشور سابقه‌ای طولانی دارد با این حال، به دلیل پراکندگی و تنوع موجود در نتایج آزمایشات مختلف دستیابی به نتیجه کلی دشوار می‌باشد. در این مطالعه جهت حل این مشکل از رهیافت فراتحلیل استفاده شده است تا از این طریق بتوان با تلفیق و آنالیز مجدد یافته‌های آزمایشات مستقل به نتیجه‌ای واحد دست یافت. برای این منظور مقالات علمی پژوهشی منتشر شده توسط محققین از سال 1996 تا 2017 در داخل کشور در خصوص اثر تنش خشکی بر عملکرد، ارتفاع و تعداد غوزه در پنبه مورد بررسی قرار گرفت. اندازه اثر برای هر صفت اختلاف میانگین تیمار تنش خشکی با شاهد می‌باشد. بررسی نتایج نمودار اندازه اثر تنش خشکی و عملکرد نشان داد همه سطوح تنش نسبت به شاهد تفاوت ‌معنی‌داری را نشان دادند (001/0>p). همچنین با بررسی نمودار اندازه اثر ارتفاع و تنش خشکی و تعداد غوزه و تنش خشکی مشخص شد تیمار شاهد در مقابل میانگین کل، شاهد در مقابل 55-41 درصد ظرفیت زراعی و شاهد در مقابل 40-25درصد ظرفیت زراعی تفاوت معنی‌داری نسبت به شاهد نشان دادند. نتایج نمودار انباشت تاثیر تنش خشکی بر عملکرد، ارتفاع و تعداد غوزه در پنبه نشان داد اکثر مطالعات در سمت چپ نمودار قرار گرفته‌اند که حاکی از تاثیر منفی تنش خشکی بر صفات مربوطه می‌باشد. همچنین، نتایج نمودار قیفی نشان داد مطالعاتی که در زمینه پنبه و تنش خشکی در ایران انجام شده به دلیل سوگیری و حجم کم نمونه مطالعاتی با دقت کافی نبوده است.

کلیدواژه‌ها


عنوان مقاله [English]

Meta-Analytical Study of the Effect of Drought Stress on Cotton’s Performance and its Components in Iran

نویسندگان [English]

  • Azadeh Razaji 1
  • Farzad Panknejad 2
  • Maryam Moarefi 3
  • Abdolmajid Mahdavi Damghani 4
  • Mohammad Nabi Ilkaee 5
1 Ph.D. Student of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran
2 Professor, Department of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran
3 Assistant Professor, Department of Plant Breeding, Karaj Branch, Islamic Azad University, Karaj, Iran
4 Associate Professor, Agro-ecology, Research Institute of Environmental Sciences, Shahid Beheshti University, Tehran, Iran
5 Associate Professor, Department of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran.
چکیده [English]

Researches related to the evaluation of the effect of the inputs dates back to long ago in Iran. However, due to the diversity and scattering of the various experimental results, it is difficult to reach to a general conclusion. The present study has made use of meta-analysis to overcome such a problem thereby to blend and reanalyze the findings of independent experiments for achieving a single result. To do so, the scientific-research articles published by the researchers from 1996 up to 2017 inside the country concerning the effect of drought stress on the performance, height and number of bolls in cotton were explored. The extend impact of an each trait is the mean difference of the drought stress results compared with control. The diagrammatic results of the drought stress and performance impact sizes showed that all of the stress levels make significant differences in contrast to the evidence treatment (p < 0.001). Moreover, it was made clear in a contrastive investigation of the diagrammatic results of the height and drought stress impact size and the number of the bolls and drought stress impact sizes that there is a significant difference between the evidence treatment and the total mean, the evidence treatment and 41%-55% of the cultivation capacity and the evidence treatment and 25%-40% of the cultivation capacity. The results of the cumulative diagram of the effect of drought stress on performance, height and number of bolls indicated that the majority of the studies fall on the left side of the diagram which is indicative of the adverse effect of the drought stress on the related traits. In addition, the results of the funnel chart demonstrated that the studies performed in Iran on cotton and drought stress are not much precise (bias and low sample volume).

کلیدواژه‌ها [English]

  • Height and Number of bolls
  • Accumulation graph
  • Funnel graph
  • germination
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