啤酒大麦冠层光合特性与产量关系的研究

研究结果表明,啤酒大麦灌浆期对籽粒干重贡献最大的是叶片,其次是芒.叶片对产量的作用顺序是旗叶>倒2叶>倒3叶,贡献大小依距“生长中心”的远近而移.各叶片贡献的大小取决于光合面积、光合能力和功能期的长短.冠层各器官和各层干重随时间变化的规律均呈相近的单峰曲线.稳重与灌浆后期叶片、叶鞘及茎秆的相关性均达显着或极显着水平.

RELATIONSHIPP BEIWEEN CANOPY PHOTOSYTHETIC CHARACTER-ISTICS AND GRAIN YIELD IN BEER BARLEY

Concerning about source and sink in bear barley,leaves act as the greatest source and then follows the owns for grain (sink) dry matter accumulating during the filling period.We also find that tile contribution is: flag leaf>the second leaf>the third leaf (from the top),in another word,leaf contribution varied with its distance from the organic centre of the plant.Different leaf contribution depends on its photosythetic area, capacity and its functional time.In growing season, each tissue''s dry matter of plant canopy shows a similar unimodal distribution relationship with growing time.The correletion analysis indicates that singleear weight has close relationship with the weight of leaves,sheath and stem in the filling period.