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不同时期小麦主栽品种冠层结构研究
引用本文:胡延吉 兰进好. 不同时期小麦主栽品种冠层结构研究[J]. 中国农业气象, 1999, 20(1): 11-14
作者姓名:胡延吉 兰进好
作者单位:山东农业大学农学系
摘    要:研究表明,不同时期小麦主栽品种的冠层结构是不同的,当前品种鲁麦14株高比50、60年代品种碧蚂1号和2号显著降低,上部节间相对较长,穗下节间构成指数I1值较大鲁麦14冠层叶片长宽比值较碧蚂1号,济南2号低,旗叶倾角较大,上部叶片消光系数K较小,下部叶片受光状态较好,使抽穗开花后绿色叶面积下降速度减慢,故鲁麦14较碧蚂1号和济南2号有一个较长时间的高光合期。对今后如何进一步改善品种的冠层结构与光合性

关 键 词:小麦 冠层结构 光合作用

Canopy Architecture of Major Wheat Cultivars Released in Different Period
Hu Yanji Lan Jinhao. Canopy Architecture of Major Wheat Cultivars Released in Different Period[J]. Chinese Journal of Agrometeorology, 1999, 20(1): 11-14
Authors:Hu Yanji Lan Jinhao
Abstract:The results of study showed that three major wheat cultivars released in different periods were significantly different in canopy architecture. Compared with early cultivars Bima 1 and Jinan 2 released in 1950s and 1960s, the modern cultivar Lumai 14 was characterized by shorter plant height, relatively longer upper internodes, and larger I 1 value. Furthermore, Lumai 14 had a smaller leaf length/width and larger flag leaf angle resulting in a smaller extinction coefficient (k) of upper leaf layers and better light interception situation of lower leaf layers, which accounted for its longer green leaf area duration and high photosynthesis duration after spike emergence and anthesis. In order to raise yield potential of wheat cultivars by further improvement of canopy architecture and photosynthesis, some important questions were discussed.
Keywords:Wheat  Canopy architecture  Photosynthesis
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