Plant N uptake
Plant N uptake tended to be similar among treatments in both growth seasons (Table 3).
In all treatments, the highest uptake occurred in the period from jointing to anthesis, following by the period from sowing to jointing, and the lowest after anthesis.
N uptake before jointing increased with increasing basal N rate; after jointing, it increased as the topdressing N rate increased.
Total N uptake at maturity increased as total N rate increased, and when an