INFLUENCE OF APPLICATION METHODS OF AMMONIUM MOLYBDATE AND COPPER CHELATE ON SPRING WHEAT GRAIN QUALITY INDICATORS

The purpose of the study is to determine the impact of the methods of using ammonium molybdate and copper chelate microfertilizers on the quality indicators of spring wheat grain. The studies were carried out in 2017–2021 on the experimental field of the Far Eastern State Agrarian University (Gribskoye village, the Blagoveshchensk District). Agrometeorological conditions in the years of the study differed mainly from the long-term average data and were characterized by waterlogging of the soil. The object of the study is the spring wheat variety DalGAU-1 bred at the Far Eastern State Agrarian University. The area of the accountting plot is 16.0 m2, fourfold repetition, the placement of plots in the experiment is randomized. The statistical significance of differences between the mean values of the parameters was assessed at a probability level of p 0.05. Scheme of the field experiment: 1 – control without the use of fertilizers; 2 – N30P30 (background); 3 – background + seed treatment with ammonium molybdate; 4 – background + seed treatment and spraying of vegetative plants with ammonium molybdate; 5 – background + seed treatment with ammonium molybdate + spraying of vegetative plants with copper chelate in the form of EDTA; 6 – background + spraying of vegetative plants with ammonium molybdate; 7 – background + spraying of vegetative plants with copper chelate in the form of EDTA. It has been established that the use of microfertilizers contributes to an increase in the quality of spring wheat grain relative to control without the use of fertilezers: the mass of 1000 seeds is from 1.4 to 4.6 g; total vitreousness – from 1.6 to 8.2 %; natural weight – from 6.5 to 38.4 g/l and protein – from 0.7 to 2.0 %. The maximum values of these quality indicators on average for 5 years of the experiment were obtained in the variant with the use of ammonium molybdate in the treatment of seeds and spraying of vegetative plants of spring wheat. The quality of spring wheat seeds directly depended on weather conditions during the study years.