01986naa a2200277 a 450000100080000000500110000800800410001902200140006002400370007410000230011124501090013426000090024352011980025265000230145065000110147365000160148465000170150065300150151765300240153270000230155670000210157970000200160070000160162070000200163677300520165620803952017-11-22       2017    bl uuuu     u00u1 u    #d  a1678-45967 a10.1590/0103-8478cr201605002DOI1 aLIBÓRIO, C. B. de  aPotassium nitrate on overcoming dormancy in Brachiaria humidicola BRS Tupi seeds.h[electronic resource]  c2017  aABSTRACT: In this study, the aim was to determine the influence of potassium nitrate, using different concentrations and immersion times on the dormancy of the seeds of Brachiaria humidicola cv. ?BRS Tupi?. Four experiments were performed adopting a factorial scheme (5x3+1) in different seed lots, for different post-harvest storage durations, during which the seeds were immersed in potassium nitrate solutions of different specific concentrations (0, 0.1, 0.3, 0.5 and 1% KNO3), for three exposure periods (12, 24 and 48h), plus one control (untreated), in a completely randomized design. The characteristics assessed included the imbibition curve, germination, first count and germination rate, as well as viability confirmed by using tetrazolium test. From the findings it was evident that treatments involving 0.1; 0.3; 0.5 and 1% KNO3 or pure water, with a 12 hour-soaking period enabled the stored seeds to germinate well for a minimum of eight months post harvest. Root protrusion was observed 24 hours post seed imbibition, whereas for the untreated seeds, satisfactory germination was observed from at least 12 months post harvest and, in most of the lots, between 18 and 24 months.  aChemical treatment  aForage  aGermination  aGerminação  aForrageira  aTratamento químico1 aVERZIGNASSI, J. R.1 aFERNANDES, C. D.1 aVALLE, C. B. do1 aLIMA, N. D.1 aMONTEIRO, L. C.  tCiência Rural, Santa Mariagv. 47, n. 6, 2017.