[Objective ] In older to understand the correlation between aerobic rice canopy photosynthetic available radiation(PAH), leaf area index( LAI) and its yield. [ Method] Canopy PAR and LAI and yield of new aerobic rice strains were determined by sunscan canopy analyzer. [ Result ] Rice canopy PAR was in 223.53 - 262.23 μmol/(m2 ·s) in the paddy fields planting condition. and 159.62 -185.74μmol( m2·a) in dry cultivation condition, and all strains had higher yield. Rice yield were both lower whether PAR was a little lower or too higher. For most rice strains, their yield improved gradually along with continuously increasing of LAI. [Conclusion] If aerobic rice obtains high yield, it canopy PAR should be in a certain range, PAR too high and too low are not easily reach the goal of high yield. LAI has a positive relationship with yield.%[目的]为了了解旱作水稻(Oryza sativa L.)冠层光合有效辐射(PAR)、叶面积指教(LAI)与其产量的相关性关系.[方法]利用SUNSCAN冠层分析仪,对正在进行产量比较试验的旱作水稻新品系的冠层PAR、LAI分别进行测量,并测定各品系的产量.[结果]当水田种植条件下冠层PAR处于223.53～ 262.23 μmol/( m2·s),旱田种植条件下PAR处于119.62 - 185.74 μmol/(m2·s)时,各品系产量均较高;PAR偏低的品系产量较低,但PAR太高的品系产量反而降低.对于大部分试验品系,随着LAI的不断提高,产量也在逐步提高.[结论]旱作水稻高产需要其冠层PAR处于一定的范围内,PAR太高或太低都不易达到高产的目标.LAI与产量呈正相关关系.
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