The effects of planting density and nitrogen application rate on nitrogen absorption and utilization by rice were studied with Wuxiangjing 9(Japonica variety).
以迟熟中粳稻武香粳9号为材料，研究了基本苗和施氮量对水稻氮素吸收与利用的影响。
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。
The experimental results show that the utilization rate of total nitrogen could reach 70%.
酱油的全氮利用率可达70 % ，氨基酸生成率达50 %以上。
Biological tests show that both fertilizers are helpful to improve lawn quality, reduce nitrate nitrogen leaching loss and raise fertilizers utilization rate.
生物试验表明：两种肥料有利于草坪质量的提高，减少土壤中硝态氮的淋失，提高肥料的利用率。
Therefore, nitrogen synergists could improve urea utilization rate.
同时可以看出氮肥增效剂能提高尿素利用率。
Therefore, nitrogen synergists could improve urea utilization rate.
同时可以看出氮肥增效剂能提高尿素利用率。
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