高粱理想株型研究Ⅱ不同株型结构冠层光分布与产量

Studies on ideal plant type of sorghum Ⅱ Canopy light distribution and grain yield in different plant types

研究表明 ,同一种基因型不同株型结构的产量差异主要是因为冠层内光分布不同所致 ,冠层内光分布不同其叶片的功能期也有差异。上层透光率与产量呈正相关关系 ,而下层的透光率与产量呈负相关关系。故保证上层有较高的透光率 ,而底层不应有漏光损失则可以获得较高产量 。

The study indicated that the yield varied with different plant type construction in the same genotype sorghum and the main reason was different sunlight distribution in the canopy that resulted from varied functional periods of leaves.The positive correlation existed in the upper layers between the light rate and the yield,while the negative correlation existed in the lower layers.Therefore,high yield could be achieved by assuring high rate of light in the upper layer and no light leakage in the lower layer,which could be fulfilled by increasing upper leaf orientation value or leaf angle elevation.