01220naa a2200217 a 450000100080000000500110000800800410001910000170006024500920007726000090016950000220017852005980020065300130079865300100081165300120082165300210083370000240085470000180087870000230089677300830091910228402002-12-17       1999    bl uuuu     u00u1 u    #d1 aPRABHU, A.S.  aRelationship between potassium fertilization and panicle blast severity in upland rice.  c1999  aNotas Cientificas  aThe influence of K2O (0, 40, 80, 120 kg/ha-1) at varying rates of N application (0, 30, 60 kg/ha-1) at planting, on panicle blast (Pyricularia grisea (Cooke) Sacc.) was studied in a field experiment conducted during three consecutive years with the upland rice cultivar Douradao. Panicle blast severity decresed with increasing rates of potassium in the absence of nitrogen (N0). The relationship between panicle blast and K rats was quadratic at 30 kg ha-1 of nitrogen.  Significant response to K fertilization was not obtained at 60 kg ha-1 of nitrogen in relation to panicle blast severity.  aAdubacao  aArroz  aBrusone  aDoenca de planta1 aBARBOSA FILHO, M.P.1 aFILIPPI, M.C.1 aZIMMERMANN, F.J.P.  tPesquisa Agropecuaria Brasileira, Brasiliagv.34, n.9, p.1729-1732, set. 1999.