Gaseous nitrogen losses of ammonia and nitrogen dioxide from derno-alluvial sandy loamy soils

Makarov, B.N.; Gerashchenko, L.B.

Agrokhimiya (3): 3-7


ISSN/ISBN: 0002-1881
Accession: 001203359

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Micro-plot experiments during 1981 and 1982 involving application of different levels (60-80 kg N/ha) and forms of N fertilizers (ammonium sulphate, ammonium nitrate, urea) showed that gaseous N losses as NO2 from sandy loamy soils were significantly greater than those from soils of heavy texture. With increasing level of applied N, gaseous losses of N as NO2 increased; the losses were highest with urea. Straw applied at 6 t/ha decreased gaseous losses of NO2 from the soil. The tabulated data show seasonal variations in NO2 losses from a fallowed soil in relation to fertilizer treatment and the changes in the nitrate content in the 0-20 cm soil layers. Gaseous losses of N as ammonia were observed only in soil given urea and only during the first 3 weeks after application.