小麦是全世界主要的粮食作物，麦粒中矿质养分尤其是微量元素的含量对人类健康和营养以及小麦的萌发、生长和产量形成都具有极其重要的影响。但是植物进入生殖生长阶段后根系活力下降，向果实、种子等代谢中运输的矿质养分和同化物主要是从叶片和茎等营养器官经过韧皮部再转移 Wheat is the main food crop in the world. The content of mineral nutrients, especially trace elements, in wheat grains is extremely important for human health and nutrition as well as the germination, growth and yield formation of wheat. However, after the plants enter the stage of reproductive growth, the vitality of the root system is decreased. Mineral nutrients and assimilates transported to the metabolism of fruits, seeds and the like are mainly transferred from vegetative organs such as leaves and stems through the phloem and then transferred