THE CHANGE IN THE CONTENT OF NITRATE IONS IN FRUITS AND VEGETABLES WHEN APPLYING FERTILIZER UREA

The relevance of the work: the problem of toxicants–anions becomes important because of the constant increasing of the number and rate circulation of nitrates and the other anions in the environment and their interaction with natural. Objective: to study the nitrate-ions’ content in fruits and vegetables with and without fertilizer application. In this work, the features of the accumulation of nitrate ions in fruit and vegetable products grown on the site without fertilizer and on the site with fertilizer were investigated. Urea (carbamide) was the main fertilizer. There were study of nitrate-ions’ content in 4 families’ plants: the Umbrella family (Apiaceae), the Solanaceae family (Solanaceae), the Pumpkin family (Cucurbitaceae) and the Amaranth family (Amaranthaceae). Represented that the content of nitrate-ions in fruit and vegetable production varies in both areas in a wide range, depending on the species of the culture, while not exceeding the maximum permissible concentration.