تأثیر سیستم های کشت غرقاب (مزرعه برنج) و خشکی (کشت سبزی ها) بر وضعیت فلزات سنگین خاک با توجه به اثرات تجمعی و باقیمانده کودهای آلی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه مهندسی علوم خاک، دانشکده کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری

2 دانشیار، گروه مهندسی علوم خاک، دانشکده کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری

چکیده

به منظور بررسی وضعیت توزیع فلزات سنگین از کمپوست زباله شهری و لجن فاضلاب در دو سیستم کشت غرقاب و خشکی، تحقیقی به صورت کرت های خرد شده با طرح پایه بلوک کامل تصادفی با سه تکرار در مزرعه پژوهشی دانشگاه علوم کشاورزی و منابع طبیعی ساری صورت گرفت. برای سیستم کشت غرقاب، مزرعه برنج (شالیزار) و برای سیستم کشت خشکی، مزرعه کشت سبزی ها درنظر گرفته شد. عامل اصلی (تیمارهای کودی) در پنج تیمار 20 و 40 تن کمپوست در هکتار، 20 و 40 تن لجن فاضلاب در هکتار و تیمار شاهد به خاک اضافه گردید. عامل فرعی (سال های کوددهی) نیز شامل سه تیمار یک، دو و سه سال کوددهی بود. نتایج نشان داد که در سیستم غرقاب تیمارهای لجن فاضلاب تأثیر بیشتری از نظر میزان انباشت فلزات سنگین در خاک داشتند، درحالی که تیمارهای کودی کمپوست در سیستم کشت خشکی مؤثرتر بودند. همچنین، در خاک تحت کشت برنج، درصد افزایش شکل قابل جذب عناصر مورد مطالعه نسبت به تیمار شاهد بیشتر از سیستم کشت خشکی بود.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of water logging (paddy-soil) and dry farming (planted with vegetables) systems on distribution status of soil heavy metals regarding the accumulative and residual effects of organic fertilizers

نویسندگان [English]

  • Seyed Majid Mousavi 1
  • Mohammad Ali Bahmanyar 2
  • Zahra Ahmadabadi 1
چکیده [English]

In order to investigate distribution status of heavy metals in cropping systems of water logging and dry farming, an experiment was conducted as split-plot arrangement based on randomized complete block design with three replications in research field of Sari Agricultural Science and Natural Resources University. A paddy-soil considered for water logging system and the planted field with vegetables considered for dry farming system. Main plot (fertilizer treatments added to soil) included five treatments: 20 and 40 ton.ha-1 compost, 20 and 40 ton.ha-1 sewage sludge and control. Also, sub factor (application years) consisted three treatments comprised: one, two and three years fertilization. The results showed that in water logging system sewage sludge treatments had more influence on heavy metals accumulation in soil while, compost treatments had more influence than sewage sludge treatments in dry farming system. Also, in paddy soil the enhancement percent of available form compared to control treatment was much more than dry farming system.

کلیدواژه‌ها [English]

  • Dry farming and water logging system
  • Heavy metals
  • Municipal solid waste compost
  • Sewage sludge
  • Soil

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