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一般确认,禾谷类作物籽粒的干物质,大部来自抽穗后植株生成的碳水化合物。在此期间,有效光合产物的数量取决于同化系统的面积(叶面积系数—LAI)及其持续期(叶面积持续期—LAD)以及叶片供给籽粒生产物质的效率(籽粒与叶之比—G)。
It is generally acknowledged that the dry matter of cereal crop grains is largely derived from carbohydrates produced by the heading plants. During this period, the amount of available photosynthate depends on the area of the assimilation system (leaf area index - LAI) and its duration (leaf area duration - LAD) and the efficiency of leaf supply to the grain production material (kernel to leaf ratio - G ).