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对27个玉米自交系材料分高产氮高效型、高产氮低效型、低产氮高效型、低产氮低效型4种氮效率类型,对其氮效率进行分析。结果表明,在高氮和低氮条件下,对氮效率的贡献均以利用效率大于吸收效率,是氮效率差异的主要决定因素。高产氮高效型基因型在高氮和低氮条件下氮效率均最高,高氮条件下氮效率平均比高产氮低效型、低产氮高效型、低产氮低效型高10.85%、122.52%、60.04%;低氮条件下高74.06%、100.34%、175.57%。高氮条件下的玉米氮效率低于低氮条件下的氮效率。
The 27 maize inbred lines were divided into four types of high efficiency nitrogen - producing high - yielding, high - yielding nitrogen inefficient, low yielding nitrogen efficient, low yielding nitrogen inefficient four nitrogen efficiency types, and their nitrogen efficiency was analyzed. The results showed that under high nitrogen and low nitrogen conditions, the contribution of nitrogen efficiency to both efficiency and absorptivity was the main determinant of nitrogen efficiency. Nitrogen efficiency was the highest under high nitrogen and low nitrogen, high nitrogen under high nitrogen was 10.85% and 122.52% higher than high nitrogen and low nitrogen, 60.04%; low nitrogen conditions, high 74.06%, 100.34%, 175.57%. The nitrogen efficiency of maize under high nitrogen conditions was lower than that under low nitrogen conditions.