Chlorophyll content had no significant relation with the net assimilation rate, but was related to the nitrogen content and the specific leaf weight. 叶绿素含量与净同化速率间没有显著关系，但与含氮量和比叶重有关。
The effect of Re element addition on the nitrogen content in the weld was insignificant due to the oxidization from the early deoxidization stage. 而由于稀土元素在先期脱氧中大量氧化，其脱氮效果较弱，稀土元素对熔敷金属的总含氮量的影响不显著。
