EFFICIENCY OF VITREOUS PHOSPHATO-POTASSIUM FERTILIZERS ON AUTUMN CROPS

Vitreous fertilizers are new type of fertilizers, made of a vitreous matrix with low and controlled solubility in water (made of macro elements useful for plants, K, P, Mg) in which are introduced microelements (Mo, B, V, Fe) necessary to the growth and development of plants. The quantity of microelements as oxides is 1-5%. The use of vitreous fertilizers offers many advantages: avoid underground water pollution; do not release acid anions in soil, like Cl - or SO 2- , harmful for plants there is no risk of soil burning when they are incorrectly dosed; in a single type of fertilizer can be embedded almost all useful elements for plants; the facility to regulate the pH of soil by the pH of glass matrix; a controlled rate of solubility in water, that can adjust easily by changing the composition of glass. Vitreous fertilizers were utilized in autumn plants (autumn wheat, barley), and the results are presented in the paper.