CAJ | 학술논문

选用耐密性不同的玉米品种郑单958和东单90，研究不同时期弱光胁迫下两个品种干物质积累分配及产量形成的差异。结果表明，郑单958在正常光照条件下产量高于东单90，弱光胁迫下产量降低幅度小。两个品种在弱光胁迫下产量和单株干物质积累量均明显降低。东单90在弱光胁迫下干物质积累总量相对较小，穗数减少，库容潜力受限制，穗粒数大幅度降低。弱光下保持较高的干物质积累总量、子粒干物质分配率以及相对稳定的穗数和穗粒数是玉米高产的关键。
선용내밀성불동적옥미품충정단958화동단90，연구불동시기약광협박하량개품충간물질적루분배급산량형성적차이。결과표명，정단958재정상광조조건하산량고우동단90，약광협박하산량강저폭도소。량개품충재약광협박하산량화단주간물질적루량균명현강저。동단90재약광협박하간물질적루총량상대교소，수수감소，고용잠력수한제，수립수대폭도강저。약광하보지교고적간물질적루총량、자립간물질분배솔이급상대은정적수수화수립수시옥미고산적관건。
The experiment with two cultivars and three shading treatments was conducted to clarify the effect of low-light on dry matter accumulation and distribution. The results indicated that shading decreased dry matter accu-mulation and two cultivars maize yield. The yield of Zhengdan958 was higher than Dongdan90 under normal light en-vironment,and decreased lesser under shading treatment. However, Dongdan90 had relatively lesser dry matter accu-mulation, decreased EN, the potential of sink was limited, GN decreased seriously. It elucidated that the key to keep high maize yield was to keep relatively high dry matter accumulation, the distribution to the grain and the stability of GN and EN in low light level.