تأثیر مقدار و شوری آب بر شوری خاک و رشد و غلظت عناصر غذایی اسفناج در گلدان

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار گروه علوم و مهندسی خاک، دانشکده کشاورزی و منابع طبیعی دانشگاه لرستان، خرم آباد، ایران

2 دانش آموخته کارشناسی ارشد علوم و مهندسی خاک دانشکده کشاورزی دانشگاه لرستان

3 استادیار گروه علوم و مهندسی آب دانشکده کشاورزی دانشگاه لرستان، خرم آباد، ایران

چکیده

پژوهش حاضر با هدف بررسی تأثیر سطوح  شوری آب آبیاری،  dSm-15/0، 3 و 6 ناشی از کلریدسدیم (به ترتیبS0.5، S3 و S6) و سطوح آبیاری 60، 80 و 100 درصد نیاز آبی گیاه (به ترتیبE60، E80، E100) بر عناصر غذایی و رشد اسفناج و پروفیل شوری خاک به‌صورت فاکتوریل در قالب طرح کاملاً تصادفی در چهار تکرار در گلدان اجرا گردید. بر اساس یافته‌ها، ارتفاع گیاه، تعداد برگ، شاخص سطح برگ و کلروفیل به‌طور معنی‌داری تحت تأثیر میزان شوری و آب قرار گرفتند به گونه‌ای که با افزایش مقدار نمک در آب آبیاری و کاهش مصرف آب، شاخص کلروفیل، شاخص سطح برگ، ارتفاع گیاه و تعداد برگ کاهش یافت. با افزایش شوری تا dSm-1 3، میزان فسفر و نیتروژن گیاه نسبت به تیمار S0.5 افزایش غیر معنی‌دار و پتاسیم کاهش معنی‌داری نشان دادند. کاهش فسفر و نیتروژن در تیمار E60 نسبت به E100 به‌ترتیب 3/1 و 46/0 درصد و افزایش پتاسیم 62/1 درصد به‌دست آمد که هیچکدام معنی‌دار نگردید. نیمرخ شوری خاک نیز بیانگر افزایش حدود 23 و 53 درصدی شوری در لایه‌ی 6-0 سانتی‌متری در تیمار S3 و S6 نسبت به S0.5 بود و با کاربرد آب با شوریdSm-1  6، متوسط شوری خاک در حد قابل قبول به‌دست آمد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The effect of amount and salinity of water on soil salinity and growth and nutrients concentration of spinach in a pot experiment

نویسندگان [English]

  • Afsaneh Alinejadian Bidabadi 1
  • Maryam Hasani 2
  • Abbas Maleki 3
1 Soil Science Department, Faculty of Agriculture Lorestan University, Khoramabad, Iran
2 M.Sc., Faculty of Agriculture, Soil Science Department, Lorestan University, Khoramabad, Iran.
3 Assistant Professor, Faculty of Agriculture, Water Engineering Department. Lorestan University, Khoramabad, Iran.
چکیده [English]

In order to investigate the effect of amount and salinity of irrigation water equal to 0.5, 3 and 6 dSm-1 caused by NaCl (S0.5, S3 and S6, respectively) and irrigation levels equal to 60, 80 and 100% of full irrigation (E 60, E80 and E100, respectively) on nutrients and growth spinach, and also soil salinity profile, an experiment was carried out in the pot in a factorial method as a complete randomized design with four replications. According to the results of the research, salinity and water had effect on plant height, number of leaves; leaf area and chlorophyll index so that increasing salt amount in irrigation water and decreasing water usage leaded to decreasing chlorophyll index, height and number of leaves in the plant. Due to increasing salinity to 3dS.m-1, concentration of P and N had increased significantly and K had decreased to S0.5, insignificantly. Content of P and N decreasing in E60 treatment to E100 was 1.3 and 0.46% respectively and the Content of K increasing was 1.62% which was not significant. Study of soil salinity profile showed that in 0-6 cm soil layer for 3 and 6 dS.m-1 treatments, salinity increased about 23 to 53% to 0.5 dS.m-1 treatment. Due to saline water 6 dS.m-1, soil with the average of salinity is acceptable.

کلیدواژه‌ها [English]

  • Sodium Chloride
  • Deficit irrigation
  • growth traits
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