CAJ | 학술논문

以重庆市对氮素利用率不同的3个玉米品种为材料，研究了氮素胁迫对3个玉米品种光合及叶绿素荧光参数的影响。结果表明，不同氮素胁迫对玉米幼苗叶片的光合参数和叶绿素荧光参数有显著影响。随着氮素胁迫的加剧，玉米叶片的光合色素质量分数降低，光合能力减弱，表现为净光合速率、蒸腾速率、气孔导度、光饱和点、光补偿点、实际光化学量子产量、最大光化学量子产量、光化学淬灭系数逐渐降低，而非光化学淬灭逐渐增加。与正常氮素水平比较，轻度氮素胁迫下各玉米品种幼苗相关指标的降低或增加幅度不同，其中雅玉2号的净光合速率、蒸腾速率、气孔导度 Pn 、实际光化学量子产量、最大光化学量子产量、光化学淬灭系数的降低幅度和非光化学淬灭的增加幅度均较小，农大108居中，成单14号的变幅最大。
이중경시대담소이용솔불동적3개옥미품충위재료，연구료담소협박대3개옥미품충광합급협록소형광삼수적영향。결과표명，불동담소협박대옥미유묘협편적광합삼수화협록소형광삼수유현저영향。수착담소협박적가극，옥미협편적광합색소질량분수강저，광합능력감약，표현위정광합속솔、증등속솔、기공도도、광포화점、광보상점、실제광화학양자산량、최대광화학양자산량、광화학쉬멸계수축점강저，이비광화학쉬멸축점증가。여정상담소수평비교，경도담소협박하각옥미품충유묘상관지표적강저혹증가폭도불동，기중아옥2호적정광합속솔、증등속솔、기공도도 Pn 、실제광화학양자산량、최대광화학양자산량、광화학쉬멸계수적강저폭도화비광화학쉬멸적증가폭도균교소，농대108거중，성단14호적변폭최대。
The photosynthesis and chlorophyll fluorescence were characterized by using three maize as ma-terials .The results showed that the significant effect of different nitrogen supply on chlorophyll content 、photosynthetic rate and chlorophyll fluorescence in maize .With the decrease of nitrogen concentration , chlorophyll content、photosynthetic rat ( Pn )、Gs 、Tr 、light compensation point、light compensation point、maximal photochemical quantum yield of PS Ⅱ(Fv/Fm )、actual quantum yield of PS Ⅱ (ΦPSⅡ )、photochemi-cal quenching co-efficient(qP ) was decreased ,and non-photochemical quenching(qN ) was increased .But in comparison with suitable nitrogen supply ,the breadth of decrease or increase in every variety was differ-ent ,the decrease of chlorophyll content , Pn ,ΦPSⅡ , Fv/Fm ,qN and the increase of qN in the cultivar Yayu 2 were both less ,the change of all parameters in Chengdan 14 was most ,the change in Nongda108was in the middle .