Beneficial Effects of the Complex Humic Microfertilizer Applied to the Ornamental Plum Hessei

摘要

There is a whole variety of industrial humic-based products on the market, which includes humates produced from peat, lignites, sapropel, and organic wastes. Many humate producers incorporate nutritional elements into the commercial products. These elements are usually introduced as water soluble salts, e.g., iron(II) sulphate, or a broad spectrum of salts is mixed with the humate as in case of Humate+7 product (Irkutski Gumat Ltd., Russia). The objective of this work was to test the efficiency of the new complex humic microfertilizer containing Fe(III), Zn(II), Mn(II), Cu(II), and B in the field conditions. The major difference of the tested humic microfertilizer from the industrial humic preparations currently available on the market is a high total content of the nutritional elements (up to 9 % mass) which makes it comparable to the artificial chelates (e.g., DTPA, EDTA, EDDHA).