建立了在作物输导系统中运输的光合产物在各运输速度区间分布几率的测定原理和估算方法,进而建立了输导系统中光合产物运输速度分布谱的构建方法,并用放射性标记法实际测定了黄瓜和水稻功能叶光合产物沿输导系统的运输速度分布谱。结果表明:(1)黄瓜和水稻源叶光合产物在输导系统中的运输速度分布谱基本相似;(2)尽管光合产物运输速度在。到最大速度之间均有分布,但大多数光合产物分子在输导系统中仍以相对较高的速 The determination principle and estimation method of distribution probability of photosynthetic products transported in crop transportation system were established. Then the method to construct the transport velocity distribution spectrum of photosynthetic products in the guidance system was established, and the method of radiolabeling Distribution of transport velocity of photosynthetic products of cucumber and rice functional leaf along the transport system. The results showed that: (1) The photosynthetic products of cucumber and rice had similar transport velocity profiles in the transmission system; (2) although photosynthetic products were transported at the same speed. To maximum velocity, most photosynthetic product molecules are still relatively high in the delivery system