Monitoring with EXotech 100BX radiometer

the canopy leaf colors of different kinds of rice materials without mp fertilizer applications during their growing periods appear the variation rules of "blacks and yellows".’For late maturity rice material Wu Yu Jing No.2

its canopy leaf colors appearthe variation rules of "three blacks and three yellows". The processes for "threeblacks" are those from transplantation to the end of tillering stage

from cladophoredifferentiation stage to spikelet differentiation stage

and from pollen mother cell formation and meiosis stage to initial heading stage. The processes for three "yellows"are oboes from the end of tillering stage to cladophore differentiation stage

fromspikelet differentiation stage to pollen mother cell formation and meiosis stage

andfrom initial heading stage to grain filling stage.For intermediate maturity rice material Shan You 63

its canopy leaf colors appear the veriation rules of "two blacks and two yellows"’ The processes for "twoblacks" are those from transplantation to spikelet differentiation stage

and from pollen mother cell formation and meiosis stage to initial heading stage. The processes for"two yellows" are those from spikelet differentiation stage to pollen mother cell formation and meiosis stage

and from initial heading stage to grain filling stage.For early maturity rice material Ya You No.2

its canopy leaf colors appear theveriation rules of "one black and one yellow". The process for "one black" is fromtransplantation to spikelet differentiation stage and the process for "one yellow" isfrom spikelet differentiation stage to grain filling stage.