CAJ | 학술논문

试验研究了不同氮水平下27个玉米自交系的氮素生产效率。结果表明，高氮和低氮水平下，高产氮高效型玉米吐丝期干物质积累量高于低产氮低效型，吐丝期氮素干物质生产效率最高。施氮后，氮素子粒生产效率和氮素干物质生产效率均下降。高氮条件下，氮素子粒生产效率与成熟期氮素干物质生产效率达到极显著正相关；低氮条件下，氮素子粒生产效率与吐丝期、灌浆期、成熟期氮素干物质生产效率呈显著相关性。高氮和低氮条件下，高产氮高效型生育后期植株氮积累量高于低产氮低效型，氮积累量的差异主要在于吐丝后氮积累，高产氮高效型生育后期根系具有强吸收能力，子粒氮素利用效率高；施氮后，后期氮吸收能力进一步增强。
시험연구료불동담수평하27개옥미자교계적담소생산효솔。결과표명，고담화저담수평하，고산담고효형옥미토사기간물질적루량고우저산담저효형，토사기담소간물질생산효솔최고。시담후，담소자립생산효솔화담소간물질생산효솔균하강。고담조건하，담소자립생산효솔여성숙기담소간물질생산효솔체도겁현저정상관；저담조건하，담소자립생산효솔여토사기、관장기、성숙기담소간물질생산효솔정현저상관성。고담화저담조건하，고산담고효형생육후기식주담적루량고우저산담저효형，담적루량적차이주요재우토사후담적루，고산담고효형생육후기근계구유강흡수능력，자립담소이용효솔고；시담후，후기담흡수능력진일보증강。
In this paper, the nitrogen production efficiency of 27 maize inbred lines with different nitrogen application level were studied. Results show that the nitrogen efficiency of dry matter production is the highest in the slik period of maize with high yield and nitrogen efficiency for both high nitrogen and low nitrogen level, and it is higher in those varieties of high yield and nitrogen efficiency than those of low yield and nitrogen dry matter accumulation. With high nitrogen application, the corre-lation between the nitrogen grain production efficiency and the mature period of nitrogen dry matter production efficiency show extremely significant positive. In low nitrogen conditions, the correlations between the nitrogen efficiency of grain production and the nitrogen dry matter production efficiencies in all of the silking stage, filling stage, mature period of maize are all significant. Under both high nitrogen and low nitrogen, plant nitrogen accumulation in the high yield and efficiency maize is higher than those low production and inefficiencies. The nitrogen accumulation difference mainly comes from the accumulation of nitrogen after spinning. The high yield and nitrogen efficiency maize have higher root absorbing ability and grain nitrogen use efficiency, and after nitrogen application, the nitrogen uptake ability enhance.