旱作水稻冠层光合有效辐射和叶面积指数与产量的相关性分析

[目的]为了了解旱作水稻(Oryza sativa L.)冠层光合有效辐射(PAR)、叶面积指数(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223.53～262.23μmol/(m2.s),旱田种植条件下PAR处于119.62～185.74μmol/(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。

Correlation Analysis on Yield and Quality Traits in Aerobic Rice( Oryza sativa L.)

[Objective] In order to understand the correlation between aerobic rice canopy photosynthetic available radiation(PAR),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 119.62-185.74 μmol/(m2·s) 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.