Gilan Hosin^*(1), Sherif Abu Dan ⁽¹⁾, and Hammoud Sakir ⁽²⁾

(1) Department of Soil Sciences, College of Agriculture, University of Aleppo, Aleppo, Syria.

(2) College of Agriculture, Al Furat University, Syria

(*Corresponding author:. Gilan Hosin E-Mail: jilanhusent@gmail.com).

Received:4/09/2021                            Accepted: 11/12/2021

Abstract

The aim of the research is to study the effect of the quantity and type of nitrogen fertilizer on nitrate washout in irrigated soils. Soil samples were taken from the surface layer 0-30 cm from Tal Brak and Dalawia soil. Three cylinders were prepared for each treatment (L1, L2, L3), and these cylinders were filled with soil similar to field soil according to depths (0-15 cm) in column L1 and (15-30 cm) in column L2 and (30-60 cm) in Column L3. The results showed that adding organic fertilizer at the beginning immediately before adding the mineral fertilizer led to a reduction in the amount of mineral nitrogen leached from the soil. And the effect of soil texture on the amount of mineral nitrogen leached from the soil, as the amount of metallic nitrogen percolated from the soil of Dalawia with a sandy clay-loam texture was greater than the amount leached from the soils of Tell Brak that had a clay texture. The type of nitrogen fertilizer used also affected the amount of mineral nitrogen leached from the soil, as the amount of mineral nitrogen leached from the soil in the case of using urea fertilizer was less than the leaching amount in the case of using ammonium nitrate fertilizer. The amount of nitrogen fertilizer added affected the amount of mineral nitrogen leached from the soil, as the amount of mineral nitrogen leached from the soil increased with the increase in the amount of nitrogen fertilizer added.

Key words: organic matter, total nitrogen, urea, ammonium nitrate.

Full paper in Arabic: pdf