A COMPARATIVE STUDY OF ZEOLITE’S AND MINERAL FERTILIZERS’ INFLUENCE ON PRODUCTIVITY OF GRAIN AND AGROCHEMICAL CHARACTERISTICS OF LIGHT GRAY FOREST LOAM SOIL

Abstract

Results of a two-year vegetation experiment of studying the effect (spring wheat) and aftereffect (on oats) of zeolite introduced in pure form (2 g / kg) or on the background of mineral fertilizers (NPK to 0.25 g / kg) are adduced. It had been found that the using of zeolite on unfertilized soil is unstable and largely affects the yield of the straw. Mineral fertilizers have the highly effective direct action, the grain yield was tripled and the yield of straw is increased in eight times. However, an aftereffect on oats were ineffective, and the zeolite gave reliable increase of main and secondary productivity on the background trend of increase in weight of 1000 grains, protein and starch in the grain. Using of a zeolite leads to a decrease in the acidity, increase in the content of movable phosphorus compounds (at 29 mg / kg or 28 % of the absolute control ) and potassium (54 mg / kg , or more than 60 % of the control). Zeolite increases the content of silicium forms in the soil, available to the plants (30% compared to control, and in comparison with the embodiment NPK too) that gives a tendency to increase of the silicon content in plants.