In certain scale, as the rates of nitrogen dressing increased, the utilization rate of nitrogen fertilizer was higher.

随追氮比例的增加，烟株对氮肥的利用率明显增大。

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So choosing and breeding maize variety of highly nitrogen fertilizer utilization rate based on different maize genotype is a positive and efficient measure to the problem.

针对这一情况，一种积极有效的措施就是根据玉米基因型存在差异而选育氮高效玉米品种。

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