The net assimilating rate of the rape seed is the important index of pholosynthetic capacity.Studies showed that the change of assimilating rate in each bear stage between individual and population was similar,the lowest was in the winter,and two peak periods were before and after winter.The individual's peak value of net assimilating rate was higher after than befove winter.And peak value of the net assimilation rate of the population unanimous basically before and after the winter, and extended time longe...