Effect of Microbial, Enzyme and Humic Substanses on Mineral Nutrition and Grain Quality of Maize Hybrids KN 509 And KN M 625

Abstract

ABSTRACTMaize hybrids, cultivated without irrigation, are considerably influenced by seasonal climate changes. The selected by us hybrids from FAO groups 500 and 600 have a very high productivity. The purpose of the study is to determine by a comparative test the influence of 3 groups of bio-stimulators on both the changes in mineral nutrition and the changes in grain quality of maize hybrids Kn 509 and Kn M 625. 13 variants are tested in each hybrid, with 4 repetitions in a variant and average 50 plants per repetition. The plants are treated in 8- 10th leave phase with all of the preparations in a dose of 500 ml/ha. 3 groups ofproducts are examined (bacterial—containing species from genera Bacillus and Pseudomonas; humic—in combination with vitamins, hydrolase's enzymes or Trichoderma; chelate compositions of Cu, Zn, Fe, Mn, B, Mo, Co + Pseudomonas sp.) The one-time treatment of the 2 hybrids doesn't have a proven effect on the yield. Leaf diagnostics in the flowering phase shows that bacterial preparations improve the assimilation of P, hydrolase's enzyme preparations balance the excessive assimilation of Mg, and humic acids and chelate compositions improve the assimilation of N. All of the examined preparations increase the protein content of corn. Regarding Kn 509, humic and enzyme preparations increase the protein production per unit of area from 17 to 19%, and regarding the Kn M 625 hybrid—from 9 to 17%. Bacterial and enzyme preparations increase the lipid content in the grain of Kn M 625 to 40%.