EFFICIENCY OF ZEOLITE AND ZEOLITE ENRICHED WITH AMINO ACIDS AS FERTILIZERS FOR MILLET

The purpose of the work is to study the effect of zeolite siliceous rock and fertilizer based on it, enriched with amino acids, on agrophysical, biological, agrochemical properties of leached black soil and millet yield. The research was carried out on the experimental field of Ulyanovsk State Agrarian University named after P.A. Stolypin. The materials (objects) were zeolite from Yushanskoye deposit in Ulyanovsk region; zeolite enriched with amino acids; Saratovskoye 12 common millet. The scheme of the experiment included 4 variants: 1 - control, 2 - zeolite 500 kg/ha, 3 - zeolite enriched with amino acids, 500 kg/ha, 4 - N40P40K40. The area of the record plot was 20 m2 (2*10), fourfold repetition. The soil of the experimental field is leached black soil with low humus content (3.8-4.0%), high mobile phosphorus content (150 mg/kg by Chirikov), increased content of exchangeable potassium (89 mg/kg), a slightly acidic reaction of soil solution (pHKCl of 5.5 units). The experiments were carried out with strict adherence to all methodological requirements, analyzes were conducted according to relevant state standards. It was established that zeolite of Yushansky deposit of Ulyanovsk region and fertilizer based on it, enriched with amino acids, have a positive effect on leached black soil properties: agrophysical state of the arable layer improved (the content of agronomically valuable aggregates increased by 11.4-11.5%); overall biological activity increased (by 15-32%); the content of phosphorus available to plants increased by 27-38 mg/kg, potassium by 11-12 mg/kg, mineral forms of nitrogen by 13.1 and 8.9 mg/kg, silicon by 10.7 and 10.9 mg/kg of soil. The increase of millet grain yield in case of application of pure zeolite was 0.40 t/ha (16%), in case of zeolite enriched with amino acids - 0.93 t/ha (37%). The yield of millet in the variant with application of zeolite enriched with amino acids was not worse than in the variant with mineral fertilizers.