Radionuclide transfer to vegetables under sprinkler irrigation

Area of Science:

• Environmental Science
• Agricultural Science
• Radiochemistry

Background:

• Intensive agriculture relies on irrigation, raising concerns about radionuclide transfer into food crops.
• Understanding radionuclide uptake in vegetables is crucial for food safety in irrigated regions.

Purpose of the Study:

• To investigate radionuclide accumulation in common vegetable crops under sprinkler irrigation.
• To assess the influence of irrigation rates, radionuclide properties, and water chemistry on uptake.
• To explore the role of mineral fertilizers and irrigation timing in regulating radionuclide transfer.

Main Methods:

• Field experiments were conducted in the North Caucasus region.
• Common vegetable crops were grown and irrigated using sprinkler systems.
• A range of radionuclides (Fe-59, Co-60, Zn-65, Sr-89, Ru-106, Cs-134, Ce-144) were studied.
• Factors like irrigation rates, water chemistry, and fertilizer application were analyzed.

Main Results:

• Radionuclides Zn-65, Ce-144, and Cs-134 showed highest accumulation in vegetative tissues.
• Zn-65, Sr-89, and Cs-134 had the greatest accumulation in edible plant parts.
• Increased irrigation rates (10 to 50 L/m²) amplified Fe-59 and Cs-134 concentrations by 1.5-3.2 fold in tissues and 1.2-3.3 fold in edible parts.
• Irrigation timing and plant development stage were identified as key factors.

Conclusions:

• Sprinkler irrigation significantly impacts radionuclide accumulation in vegetables.
• Irrigation rates and specific radionuclide properties are critical determinants of uptake.
• Management practices, including irrigation timing and fertilization, can regulate radionuclide transfer into crops.