01887naa a2200229 a 450000100080000000500110000800800410001910000230006024501010008326000090018450001350019352010820032865000160141065000150142665000290144165300220147070000230149270000200151570000160153570000170155177300890156811074172018-11-07       2002    bl uuuu     u00u1 u    #d1 aOLIVEIRA, M. W. de  aLeaching of nitrogen, potassium, cacium and magnesium in a sandy soil cultivated with sugarcane.  c2002  aTítulo em português: Lixiviação de nitrogênio, potássio, cálcio e magnésio em solo arenoso cultivado com cana-de-açúcar.  aA lysimeter experiment was carried out with sugarcane aiming to evaluate the leaching of nitrogen derived from either urea (15N) or the soil/sugarcane crop residues. The leaching of K+, Ca2+, and Mg2+ was also evaluated. The experiment was a factorial 2x4. The influencing factors were: firstly, the differential addition of two kinds of sugarcane remains to the soil, simulating conditions of cane- plantation renewal after the cane crop harvest, with and without previous straw removal by burning; secondly, four doses of N: 0, 30, 60, and 90 kg ha-1. During the experimental period the total volume of water received by the sugarcane-soil system was 2,015 mm, with 1,255 mm as precipitation and 760 mm as irrigation. The loss of N by leaching from the fertilizer (15N) was not detected. In the first three weeks the largest losses of N by leaching occurred, originating from the soil/sugarcane remains-N. The mean of leached N during the experimental period of 11 months was of 4.5 kg ha-1. The mean losses of K+, Ca2+, and Mg2+ were of 13, 320 and 80 kg ha-1, respectively.  afertilizers  alysimeters  asoil transport processes  amineral nutrients1 aTRIVELIN, P. C. O.1 aBOARETTO, A. E.1 aMURAOKA, T.1 aMORTATTI, J.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 37, n. 6, p. 861-868, jun. 2002