The Content, Uptake and Bioaccumulation Factor of Copper and Nickel in Grass Depending on Zinc Application and Organic Fertilization

Different content of Zn in the soil and organic fertilization can affect micronutrient uptake by plants. A pot experiment was carried out to determine the impact of increasing Zn application rates, i.e., 200, 400 and 600 Zn mg & BULL;kg-1, in combination with bovine and chicken manures and mushroom substrate on Cu and Ni content, uptake and bioaccumulation factor in cocksfoot (Dactylis glomerata L.). Control objects without Zn and organic fertilizers and after application of only different Zn doses and only organic fertilizers were also tested. Application of Zn at 400 and 600 mg & BULL;kg-1 significantly decreased the content, uptake and value of bioaccumulation factor of Cu in the grass. Different Zn doses were not found to influence the content and bioaccumulation factor of Ni in cocksfoot, but application at 200 Zn mg & BULL;kg-1 increased Ni uptake. Chicken manure increased the content and bioaccumulation factor of Cu and Ni in the test plant, and all the organic fertilizers increased their uptake. Cocksfoot showed no tendency to excessive bioaccumulation of Cu and Ni.

Automated summary

The content of Zn in soil and the use of organic fertilizers can affect the uptake of micronutrients by plants. A pot experiment was conducted to investigate the impact of different Zn application rates and organic fertilization on the Cu and Ni content, uptake, and bioaccumulation factor in cocksfoot. The results showed that higher Zn application rates significantly decreased the content, uptake, and bioaccumulation factor of Cu in the grass. Conversely, the application of Zn did not affect the content and bioaccumulation factor of Ni, except for a slight increase in Ni uptake at a lower Zn application rate. The use of organic fertilizers increased the content, bioaccumulation factor, and uptake of Cu and Ni in cocksfoot.