CAJ | 학술논문

在高氮和低氮条件下，对高产氮高效型、高产氮低效型、低产氮高效型、低产氮低效型四个类型玉米自交系氮效率筛选指标进行分析。结果表明，施用氮肥后，高产氮高效型和高产氮低效型根系氮素转移量增加，对子粒氮的贡献率提高。低氮下高产氮高效型根系氮转移量对子粒氮的贡献率高于高产氮低效型，高氮和低氮条件下两种基因型子粒氮主要来源于粒重形成阶段营养体的转移，而氮素不足时高产氮高效型后期根系氮素吸收能力比高产氮低效型更具有优势。无论高氮还是低氮条件下，对高产氮高效基因型的筛选，子粒吸氮量和吐丝期茎叶总氮量是重要的辅助筛选指标。
재고담화저담조건하，대고산담고효형、고산담저효형、저산담고효형、저산담저효형사개류형옥미자교계담효솔사선지표진행분석。결과표명，시용담비후，고산담고효형화고산담저효형근계담소전이량증가，대자립담적공헌솔제고。저담하고산담고효형근계담전이량대자립담적공헌솔고우고산담저효형，고담화저담조건하량충기인형자립담주요래원우립중형성계단영양체적전이，이담소불족시고산담고효형후기근계담소흡수능력비고산담저효형경구유우세。무론고담환시저담조건하，대고산담고효기인형적사선，자립흡담량화토사기경협총담량시중요적보조사선지표。
The nutrient indices of four different N-efficiency maize inbred lines:high yield with high N efficiency , high yield with low N efficiency , low yield with high N efficiency and low yield with low N efficiency , were studied under high and low nitrogen fertilizer application rates .The results show that the N contents in stems and leaves and their transfer amount to grains are important indices for the screening of high yield with high N-efficiency genotype of maize, regardless of the N fertilizer application rates .The application of N fertilizer can increase the absorption and transfer of N from vegetative parts to grains .The contribution rate to grain N accumulation transferred from the vegetative parts are higher than from the roots at anthesis stage in all genotypes of maize under both high and low N application rates , but the N absorption amount and transfer rate from roots to grains are higher with high yield with high N-efficiency genotype when N is applied at low level .The contribution rate to grain N accumulation through the transfer from vegetative parts in high yield with high N efficiency type is higher than that in high yield with low N-efficiency type at both N application conditions .Therefore , both the N absorb amount and the total N content in the stem and leaf are important indices for the screening of high yield with high N-efficiency genotype of maize .