اثر مواد آلی، گچ و آبشویی بر ویژگی‌های فیزیکی و شیمیایی یک خاک سدیمی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد، گروه خاکشناسی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

2 استاد، گروه خاکشناسی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

3 دانشجوی دکترای، گروه خاکشناسی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

چکیده

به منظور بررسی تاثیر سطوح مختلف گچ (صفر، 50 و 100 درصد نیاز گچی) و مواد آلی از بقایای گیاه یونجه، ذرت، ضایعات خرما و خاک اره (5/1 و 3 درصد کربن آلی) بر ویژگی‌های فیزیکی و شیمیایی یک خاک سدیمی یک آزمایش فاکتوریل در قالب طرح کاملا تصادفی با سه تکرار در گلخانه به اجرا درآمد. نتایج نشان داد که مصرف گچ سبب بهبود ویژگی­های خاک سدیمی قبل و پس از آبشویی شد. مصرف مواد آلی قبل از آبشویی نسبت جذب سدیم، درصد سدیم تبادلی و درصد رس قابل انتشار را به صورت ناچیزی افزایش داد ولی پس از آبشویی خاک مقدار این ویژگی ها در مقایسه با شاهد بطور معنی­داری کاهش یافت. اثربخشی مصرف گچ به همراه مواد آلی برای اصلاح ویژگی­های خاک سدیمی به ویژه در ترکیب با ضایعات خرما به میزان 3 درصد کربن آلی بیشتر از مصرف جداگانه آن­ها پس از آبشویی بود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The Effects of Organic Matter, Gypsum and Leaching on Physico-chemical Properties of a Sodic Soil

نویسندگان [English]

  • mosayeb vafaee 1
  • Ahmad Golchin 2
  • Akram Sadeghbeigi 1
  • tahereh mansouri 3
1 Former M.Sc. Student, Department of Soil Science, College of Agriculture, Zanjan University, Zanjan, Iran
2 Professor, Department of Soil Science, College of Agriculture, Zanjan University, Zanjan, Iran
3 Ph.D. Student, Department of Soil Science, College of Agriculture, Zanjan University, Zanjan, Iran
چکیده [English]

In order to investigate the effects of different levels of gypsum (0, 50 and 100% gypsum requirement), organic matter (1.5 and 3% w/w organic carbon) from different sources (alfalfa residue, corn residue, date waste and saw dust) and leaching on the physico-chemical properties of a sodic soil, a factorial experiment was conducted in a greenhouse using a completely randomized design with three replicates. The results showed that the application of gypsum improved the sodic soil properties, before and after the leaching. However, the application of organic matter slightly increased sodium adsorption ratio, exchangeable sodium percentage and the percentage of dispersible clay measured before leaching. But after leaching, these characteristics were decreased significantly as compared to the control. The application of organic matter together with gypsum, especially the application of 3% date waste with gypsum, improved the properties of the sodic soil after the leaching more effectively than the application of gypsum and organic matter separately.

کلیدواژه‌ها [English]

  • Dispersible clay
  • Exchangeable sodium percentage
  • Leaching
  • Organic waste
  • Sodic soil
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