论文部分内容阅读
绝大部分的农作物都是高等植物。高等植物体是由根、茎、叶等器官组成的。各器官有较明确的分工:根的主要功能是从土壤中吸收水分和矿质元素,叶的功能是进行光合作用以合成有机物。各器官间通过输导组织而互相连通,使根吸收的水分和无机营养可以向上运输到地上部茎叶中去,在叶子中合成的有机营养也可以转移到根和块根、块茎、果实、种子等部分,这样使把整个植株连通成为一个整体。在农作物成熟时,作物体内的有机物往往发生重新分配,把暂时贮存在茎部的有机物转移到最后的贮藏器官中去。因此,了解作物体内的物质运输和分配情况,是十分重要的。
The vast majority of crops are higher plants. Higher plant body is composed of roots, stems, leaves and other organs. Each organ has a more specific division of labor: the main function of the root is to absorb moisture and mineral elements from the soil, and the function of the leaf is to carry out photosynthesis to synthesize organic matter. The organs are connected to each other through the conducting tissues so that the root-absorbed moisture and inorganic nutrients can be transported upwards to shoots and leaves. The organic nutrients synthesized in the leaves can also be transferred to roots and tubers, tubers, fruits and seeds And so on, so that the whole plant connected as a whole. Organics in crop plants often redistribute as crops mature, transferring the organics temporarily stored in stems to the final storage organ. It is therefore important to understand the transport and distribution of materials in the crop.