نوع مقاله: مقاله پژوهشی

نویسنده

استادیار پژوهشکده خرما و میوه‌های گرمسیری، موسسه تحقیقات علوم باغبانی، سازمان تحقیقات، آموزش و ترویج کشاورزی، اهواز، ایران.

چکیده

مصرف آب شور با توجه به محدودیت شدید منابع آب غیرشور به‌ویژه در مناطق خشک و نیمه‌خشک، برای تداوم کشاورزی اجتناب‌ناپذیر است. این تحقیق در قالب طرح آماری بلوک‌های کامل تصادفی با چهار تیمار شوری آب آبیاری معادل 3/0، 3، 6 و 9 دسی زیمنس بر متر و سه تکرار روی نهال‌های کُنار گونه Ziziphus spina-christi انجام شد. میزان شوری عصاره اشباع خاک، تعداد برگ، ماده تر و خشک ریشه، ماده تر و خشک اندام هوایی، نسبت اندام هوایی به ریشه و مقدار نسبی آب در اندام هوایی گیاه اندازه‌گیری شدند. شوری آب آبیاری در سطح احتمال یک درصد، اثر معنی‌دار بر شوری خاک و صفات ریشه و اندام هوایی گیاه داشت. نتایج نشان داد که با افزایش شوری آب آبیاری از 3 به 6 دسی زیمنس بر متر، ماده تر و خشک ریشه به‌ترتیب با 4/34 و 5/30 درصد کاهش معنی‌دار و ماده تر و خشک اندام هوایی به‌ترتیب معادل 7/9 و 6/3 درصد کاهش یافتند. تمام صفات ریشه و اندام هوایی گیاه هنگام رسیدن شوری آب آبیاری از 6 به 9 دسی زیمنس بر متر کاهش معنی‌دار در سطح احتمال یک درصد داشتند. در شوری آب 9 دسی زیمنس بر متر، مقدار کاهش ماده تر و خشک ریشه به‌ترتیب 5/47 و 9/40 درصد و مقدار کاهش ماده تر و خشک اندام هوایی به‌ترتیب 5/31 و 6/19 درصد بود. توابع تولید شوری آب-ماده خشک اندام هوایی به‌صورت پنج معادله خطی، درجه دوم، درجه سوم، لگاریتمی و نمایی برآورد شدند. معادله درجه سوم با بیشترین ضریب تعیین تعدیل‌شده و کارایی مدل‌سازی و کمترین مقدار حداکثر خطا، ریشه میانگین مربعات خطای نرمال‌شده و ضریب جرم باقی‌مانده دارای دقت برازش بیشتر از سایر معادله‌های بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Feasibility Study of Saline Water Usage by Determining of Salinity Production Function on Ber (Ziziphus Spina-Christi)

نویسنده [English]

  • Majid Alihouri

Assistant Professor, Date Palm and Tropical Fruits Research Center, Horticultural Sciences Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Ahvaz, Iran.(

چکیده [English]

Non-saline water resources are scarce, especially in arid and semi-arid regions. Therefore, the consumption of saline water is inevitable in agricultural usage. Iran has large saline water sources that have different levels of salinity. The use of these resources requires special management practices for the reduction of their negative environmental impacts. The usage of saline drainage waters, generated by irrigated agriculture, seems inevitable for plants irrigation.
Salinity stress reduces the osmotic potential, as well as all major processes of plant including growth, photosynthesis, protein synthesis, and lipid and energy metabolism. Of course, the response of plants and tolerance of different species of plants are different to salinity. The rapid reduction of leaf area and number of leaves, decreasing biomass (dry matter) of the shoot and root, as well as reducing the plant height and active root level in the soil are among the plant responses to salinity stress. Salinity induced changes in photosynthesis, stomatal behavior, chlorophyll content and accumulation of metabolites at growth various stages of ber (Hooda et al, 1990; Ramoliya and Pandey, 2007). Investigating the applicability of agricultural lands drainage in irrigation of juvenile ber plantation and determining the production function of water salinity-shoot dry matter of juvenile ber were overall objectives of this research.

کلیدواژه‌ها [English]

  • Coefficient of Determination
  • Drain Water
  • irrigation
  • Modeling Efficiency
  • Vegetative growth

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