02313naa a2200373 a 450000100080000000500110000800800410001902400590006010000170011924500700013626000090020652011820021565000210139765000220141865000310144065000130147165000160148465000180150065300330151865300220155165300230157365300400159665300170163665300150165365300330166865300250170165300270172670000210175370000170177470000220179170000200181370000220183377300840185520449282016-05-12       2007    bl ---       0--  u    #d7 ahttp://dx.doi.org/10.1590/S0100-204X20070002000082DOI1 aDINIZ, E. R.  aGreen manure incorporation timing for organically grown broccoli.  c2007  aThe objective of this work was to determine the effect of incorporation timing of the velvet bean (Stizolobium cinereum) (GM) on both organic broccoli yield and N status. Mineral N content in the soil, biologically fixed N recovery by broccoli, GM biomass decomposition and N release kinetics were also determined. Plots were fertilized with 12 Mg ha-1 of organic compost and received GM either at 0, 15, 30 or 45 days after transplant. Other treatments were compost (12 or 25 Mg ha-1), GM, mineral fertilizers and control (no fertilizer). The data were collected in four completely randomized blocks. GM decomposition increased mineral N content in soil as rapidly as mineral fertilizer or the supply of 25 Mg ha-1 of compost. The N half-life in GM (24 days) is smaller than the mass half-life (35 days) and the biological fixation contributed with 23.6% of N present in the aboveground biomass of broccoli. The result suggests a higher synchrony between the crop relative growth rate and N release from the GM when incorporated at crop early growth stage. The incorporation of GM until 15 days after transplanting replaces 50% of the highest compost dose, without yield loss.  aAdubação Verde  aBrassica Oleracea  aBrassica Oleracea Botrytis  aBrócolo  aNitrogênio  aProdutividade  abiological nitrogen fixation  aCultivo orgânico  adecomposition rate  aFixação biológica do nitrogênio  aMucuna-cinza  aN recovery  arecuperação de nitrogênio  aStizolobium cinereum  ataxa de decomposição1 aSANTOS, R. H. S.1 aURQUIAGA, S.1 aPETERNELLI, L. A.1 aBARRELLA, T. P.1 aFREITAS, G. B. de  tPesquisa Agropecuária Brasileira, Brasíliagv.42, n. 2, p.199-206, fev. 2007.