بررسی اثر اسید هیومیک بر برخی ویژگی‌های مورفوفیزیولوژیکی و بیوشیمیایی پایه‌های بادام تحت ‏تنش شوری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران

2 دانشیار، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران

3 دانشیار، دانشکده کشاورزی و منابع طبیعی، دانشگاه ارومیه، ارومیه، ایران

چکیده

انتخاب منابع ­کودی مناسب، مشکلات ناشی از شوری را از گیاه دور می­کند. بدین­منظور، آزمایش فاکتوریل، در قالب طرح بلوک­های­کامل تصادفی،در سه تکرار، در دانشگاه ­محقق اردبیلی، در سال­های 96-1395، انجام شد.عامل اول اسیدهیومیک در­ چهار سطح (صفر، 5/2، 5 و7 کیلوگرم­برهکتار)، عامل دوم کلریدسدیم در چهار سطح (صفر،60،120 و180 میلی­مولار) و عامل سوم پایه­های ­دوساله­ بادام ­بذری در دو سطح (GF677 و  (GN15بودند نتایج نشان داد با افزایش شوری، وزن خشک ریشه به ساقه، به­ویژه در GF677، Na+ و Cl و شاخص روزنه­ای، به‌ویژه در GN15، افزایش و سطح­ویژه­­برگ، K+ و N، پتانسیل­آب­برگ، هدایت روزنه­ای، فتوسنتز و تعرق، به­ویژه در GN15، کاهش پیداکردند. کربوهیدرات­، تا  120 میلی­مولار، به­ویژه در GF677، افزایش و سپس کاهش یافت. GF677، با افزایش اسیدهیومیک تا 5 کیلوگرم­برهکتار، در شوری 180 میلی­مولار، با بیشترین وزن خشک ریشه به ساقه و سطح ویژه برگ، کمترین Na+ و Cl و بیشترین K+ و N برگ، دارای بیشترین پتانسیل آب برگ (9/1- مگاپاسکال) و کربوهیدارت (92/86 میلی­گرم­ بر گرم­ وزن­تر)، نسبت به دو پایه دیگر بود. بیشترین هدایت روزنه­ای (53/0 میلی­مول­برمترمربع­برثانیه) و فتوسنتز (73/18 میکرومول CO2 برمترمربع­برثانیه) در پایه GF677، 5/2 کیلوگرم­برهکتار اسیدهیومیک و شوری شاهد به‌دست آمد. با افزایش اسیدهیومیک، در این شرایط، شاخص روزنه­ای، به­ویژه در پایه GF677، کاهش یافت. لذا، GF677، متحمل­ترین پایه ­به ­شوری و 5/2 و 5 کیلوگرم­برهکتار اسیدهیومیک، مناسب­ترین سطوح، بر پایه­های بادام ارزیابی گردیدند.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation the effect of humic acid on some morphhophysiological and biochemical ‎characteristics of almond rootstocks under salinity stress

نویسندگان [English]

  • Elnaz Hatami 1
  • Ali akbar Shokouhian 2
  • Alireza Ghanbari 2
  • Lotfali Naseri 3
1 Ph.D. Candidate, Faculty of Agriculture, University of Mohaghegh‏ ‏Ardabili, Ardabil, Iran ‎
2 Associate Professor, Faculty of Agriculture, University of Mohaghegh‏ ‏Ardabili, Ardabil, Iran ‎
3 Associate Professor, Faculty of Agriculture, Urmia University, Urmia, Iran
چکیده [English]

Choosing suitable feed sources remove the problems of salinity from the plant. For this purpose, an experiment as factorial was conducted in a RCBD with three replications at the University of Mohaghegh Ardabili during 2015-16. The first factor was humic acid (HA) application at four levels: (0, 2.5, 5 and 7 kgha-1), the second factor was salinity at four levels: (0, 60, 120 and 180mM NaCl) and the third factor was two-years old almond rootstocks seedling at two levels (GF677 and GN15). Results showed that with increasing salinity, root/stem dry weight increased, especially in GF677, Na+ and Cl and SI increased, especially in GN15 and SLA, K+ and N, leaf osmotic potential, gs, Pn and T were decreased, especially in GN15. Carbohydrates increased to 120mM NaCl, especially in GF677 and then decreased. GF677 with an increase in HA up to 5 kgha-1, in the salinity of 180mM NaCl, with the highest root/stem dry weight and SLA, the lowest Na+ and Cl-and the highest K+and N of leaf had the highest leaf osmotic potential (-1.9MPa) and carbohydrate (86.92 mg gFW-1) compared to other rootstocks. The highest gs (0.53 mmol m-2s-1) and Pn (18.73 μmolCO2 m-2s-1) were found in GF677, 2.5 kgha-1 HA and 0 mM NaCl. With increasing HA, in these conditions, the SI decreased, especially in GF677. Therefore, GF677 was evaluated as the most tolerant rootstock for salinity and 2.5 and 5 kgha-1HA was evaluated as the most appropriate levels for affecting almond rootstocks.

کلیدواژه‌ها [English]

  • Element concentration
  • Humic Acid
  • NaCl
  • Prunus dulcis Mill
  • stomatal conductivity‎
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