两个不同穗型小麦品种的冠层辐射和光合特征的比较研究  

A Comparative Study on Characteristics of Radiation and Photosynthesis in Canopy of Two Different Spike-type Cultivars of Wheat

作　　者：赵会杰[1] 李有[1] 邹琦[2] 

机构地区：[1]河南农业大学,河南郑州450002 [2]山东农业大学,山东泰安271018

出　　处：《作物学报》2002年第5期654-659,共6页Acta Agronomica Sinica

基　　金：国家重点基础研究专项经费 (G19980 10 10 0 );河南省自然科学基金 (990 40 1190 0 )资助

摘　　要：对大穗型和多穗型小麦品种的比较研究表明 ,大穗型品种生育前期 (拔节前 )存在一定的漏光损失 ,群体光合速率 (NCP)低于多穗型品种 ,但中后期群体总茎数较少 ,冠层透光率较高 ,消光系数较低 ,中下部叶片可得到较好的光照 ,绿叶衰退缓慢 ,NCP和群体叶源量均高于多穗型品种 。The results of a comparative study to large and multi spike cultivar of wheat showed that owing to some light leak losses, net canopy photosynthetic rate (NCP) of large spike cultivar was lower than that of multi spike cultivar before jointing stage. However, NCP and canopy leaf source capacity (CLSC) of large spike cultivar were much higher after booting stage because of fewer shoots, higher transmission percentage of light, lower light extinction coefficient, better radiation condition in lower part in canopy and shower senescence of leaves. As a result, higher yield and light use efficiency were obtained by the large spike cultivar.

关 键 词：穗型 小麦 品种 冠层辐射 光合特征 大穗型品种 多穗型品种 群体光合作用 

分 类 号：S512.1[农业科学—作物学]