Open AccessThe intensity of heavy metals accumulation by the milk thistle leaf mass under its fertilization with the latest fertilizers
Author(s) -
Serhii Razanov,
Svitlana Tkachyk,
Alla Razanova
Publication year - 2020
Publication title -
agrobìologìâ
Language(s) - English
Resource type - Journals
eISSN - 2415-7457
pISSN - 2310-9270
DOI - 10.33245/2310-9270-2020-161-2-160-167
Subject(s) - fertilizer , cadmium , milk thistle , agronomy , human fertilization , phosphorus , chemistry , chelation , contamination , nutrient , zinc , thistle , biology , inorganic chemistry , ecology , organic chemistry , pharmacology
The aim of the research is to study the intensity of heavy metals accumulation in milk thistle leaf mass under fertilization with the latest types of fertilizers and to assess the environmental safety of such raw materials. Two experiments were laid in the research: the effect of fertilizing milk thistle with organo-mineral fertilizer Growth-concentrate on the intensity heavy metals accumulation by its leaf mass; the effect of fertilizing milk thistle with chelated fertilizers Phosphorus-chelate and Potassium-chelate on the intensity on heavy metals accumulation by the leaf mass. The use of a chelated Phosphorus chelate fertilizer for the fertilization of milk thistle crops leads to a 1.1 times decrease in the contamination of its leaf mass with cadmium and copper in comparison with the option without fertilizing its crops, and the increase in the concentration of lead and zinc compared to the control is insignificant and is within the range errors of experience. The use of fertilization of crops of milk thistle chelated fertilizer Potassium-chelate helps to reduce the contamination of its leaf mass with cadmium compared to the control, and the change in its contamination with copper is within the margin of error. At the same time, replacing the Growth-concentrate fertilizer with Phosphorus-chelate or Potassium-chelate when fertilizing milk thistle crops will lead to a decrease in the contamination of its leaf mass with lead, cadmium and copper, but will increase the contamination with zinc, compared to the control. The most environmentally safe leaf raw material of milk thistle in terms of lead, cadmium and copper content will be observed when fertilizing its crops with chelated fertilizers Phosphorus-chelate, and in terms of zinc content – when fertilizing with organo-mineral fertilizer Growth-concentrate. It is advisable to use Phosphorus-chelate fertilizer for the plant fertilization to reduce the contamination of the leaf mass of the medicinal raw material of milk thistle with heavy metals, in particular cadmium – by 9 % and copper – by 11 %,. To reduce contamination of the leaf mass with zinc by 81 %, it is recommended to use the organic-mineral fertilizer Growth-concentrate.Key words: milk thistle, medicinal raw materials, environmental safety, heavy metals, pollution, fertilizers.