ارزیابی اثرات تنش آبی و کود کمپوست زباله شهری بر شاخص‌های مورفوفیزیولوژیک و اجزای عملکردی گیاه عدس (Lens culinaris Medik)

نوع مقاله: پژوهشی

نویسندگان

گروه زیست‌شناسی، دانشکده علوم، دانشگاه صنعتی خاتم الانبیاء بهبهان، بهبهان، ایران

چکیده

کود کمپوست به سبب دارا بودن مواد مغذی فراوان، ظرفیت نگه­داری آب بالا، تنظیم کننده­های رشد گیاهی و وجود ریزجانداران مفید می­تواند خصوصیات فیزیکوشیمیایی خاک را بهبود و تأثیر مطلوب بر رشد و نمو گیاهان داشته باشد. به این منظور آزمایشی با هدف بررسی تأثیر کود کمپوست بر شاخص­های مورفوفیزیولوژیکی گیاه عدس تحت تنش کمبود آب به‌صورت فاکتوریل در قالب طرح کاملاً تصادفی با سه تکرار و در محیط باز در دانشگاه صنعتی خاتم الانبیاء بهبهان به اجراء درآمد. تیمارهای آزمایش شامل 5 سطح اختلاط کمپوست و خاک (با نسبت­های وزنی 100:0، 95:5، 85:15، 75:25 و 65:35) و 3 سطح تنش آبی شامل بدون تنش، تنش ملایم و تنش شدید (به‌ترتیب آبیاری در سطح 75، 50 و 25 درصد ظرفیت زراعی) بود. نتایج نشان داد که بین سطوح مختلف کمپوست و تنش ­آبی در تمامی صفات مورد بررسی اختلاف معنی­داری وجود داشت. مقایسه میانگین­ها نشان داد که در شرایط بدون تنش و تنش ملایم، استفاده از مخلوط کمپوست و خاک در سطوح 25 و 35 درصد وزنی منجر به افزایش معنی­دار ارتفاع بوته، سطح برگ، تعداد برگ، وزن خشک ریشه، سطح ریشه، کلروفیل a و نسبت کلروفیل a/b در مقایسه با سطوح شاهد شد. در شرایط تنش شدید، کاربرد کمپوست در سطح 35 درصد وزنی منجر به افزایش معنی­دار تعداد برگ، سطح برگ، طول ریشه و میزان کلروفیل a گشت. لذا استفاده از مخلوط کود ­کمپوست و خاک به­خصوص با نسبت 65:35 به منظور بهبود خصوصیات مورفوفیزیولوژیک و عملکردی گیاه عدس در شرایط تنش آبی ملایم (یا شدید) توصیه می­شود.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluating the effects of water stress and urban waste compost on morpho-physiological indices and yield components of lentil (Lens culinaris Medik)

نویسندگان [English]

  • Raheleh Ahmadpour
  • Saeed Reza Hossain Zade
Department of Biology, Faculty of Sciences, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran
چکیده [English]

Compost fertilizer because of containing abundant nutrients, high capacity for holding water, plant growth regulators and helpful microorganisms can improve soil physicochemical characteristics and play an effective role in plant growth and development. In order to evaluate the effects of compost fertilizer on morpho-physiological indices of lentil under water deficit stress, a factorial experiment was conducted in a natural environment and with three replications based on a completely randomized design in the Khatam Alanbia University of Behbahan. The experiment treatments consisted of five ratios of compost fertilizer and soil (0:100, 5:95, 15:85, 25:75, and 35:65) and three levels of water stress inclding no stress, moderate stress, and severe stress (irrigation at 25, 50, and %75 of field capacity, respectively). Results showed that there were significant differences in all traits under different compost fertilizer and water stress levels. The findings also showed that under no stress and moderate water stress conditions, application of a mixture of compost and soil at %25 and %35 weight, resulted in a significant increase in the plant height, leaf area, leaf number, root dry weight, root length, root area, and Chlorophyll a and a/b ratio compared to the control levels. Under severe water stress, application of compost at 35% level led to a significant increase in the number of leaves, leaf area, root length, and Chlorophyll a content. Therefore, the use of a mixture of compost and soil (especially 35:65 ratio) is recommended to improve the morpho-physiological characteristics and yield componentsof lentil under moderate (or severe) water stress conditions.

کلیدواژه‌ها [English]

  • Drought stress
  • Leaf area
  • Chlorophyll content
  • Root characteristics
  • Yield components
 

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