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Accumulation of Heavy Metals in Agricultural Crops and Ecological Series of Crops Placement

Authors

  • Zafar Zairovich Uzakov Department of Agrochemistry and Ecology, Geography and Agronomy Faculty, Karshi State University, Karshi, Uzbekistan. https://orcid.org/0000-0001-6284-2383
  • Khusniddin Nagimovich Karimov Research Institute of Soil Science and Agrochemistry, Tashkent, Uzbekistan. https://orcid.org/0000-0003-1060-808X
  • Zair Uzakovich Uzakov Karshi Branch, Tashkent University of Information Technologies named after Muhammad Al-Khwarizmi, Uzbekistan. https://orcid.org/0000-0001-8459-6072
  • Ravshan Abdurazakovich Eshonkulov Department of Ecology and Labor Protection, Karshi Engineering-Economics Institute, Uzbekistan. https://orcid.org/0000-0002-9743-3659

DOI:

https://doi.org/10.21123/bsj.2022.7210

Keywords:

accumulation of heavy metals, agricultural crops soil, ecological series of vegetable and melon crops, ecological monitoring, heavy metals, toxic elements

Abstract

The accumulation of toxic elements in vegetables and melons grown in agriculture, Brassica rapa - turnip, Solanum lycopersicum - tomato, Citrullus lanatus - watermelon, Capsicum annuum - bell pepper, Daucus carota - carrots, Cucurbita pepo - pumpkin, Cucumis melo - melon, and also Prunus armeniaca - apricot from fruit trees were analyzed. The excess of maximum allowable concentrations in agricultural crops of the element As by 1.65-1.75, Cd - 1.6-2.3, Cr -1.2-2.35, Cu -1.6-3.3, Ni - 1.16-3.53, Pb - 1.54-3.08, Al - 1.36-3.5, Sb - 2.0-33, Se - 1.1-3.3 times was established. The maximum allowable concentration of mercury in vegetables and melons was equal to 0.02 mg/kg, and in the chosen plants this indicator was close to the maximum allowable concentration (MAC). An ecological series of vegetable and melon crops (tomatoes → pumpkin → turnips → bell peppers → melons → watermelons → carrots) has been developed for their placement on fields contaminated with heavy metals Se, As, Pb, Cd, Zn, included in the first class in terms of the degree of danger to human health, while Ni, Cu, Cr metals were from the second class, and metal Mn from the third class. Agricultural crops in the ecological series are placed in inverse proportion to the regularities of the hyper accumulation of heavy metals in them.

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