摘要： 本试验对春玉米的叶片、叶鞘、茎秆和雌雄穗等器官的蔗糖含量的变化进行了分层次的系统研究。结果表明，随着春玉米生长发育进程，叶片、叶鞘蔗糖含量变化为二次多项式模型，茎秆为三次多项式模型，而雌穗呈单峰曲线变化。茎与雌穗之间蔗糖浓度的差异是子粒灌浆的内在动力之一。下部叶片的光合产物在生长发育前期起主导作用，上、中部叶片则在后期起主导作用，两部分光合产物均参与子粒生长发育。

关键词: 春玉米, 营养生理, 蔗糖

Abstract: The changes of sucrose content were systematically studied in the blade, blade sheath, stem, tassel and ear of spring maize according to its distribution in different organs in this experiment.As a result, with the growth of spring maize, the change of sucrose content shows a duality regression model in the blade and blade sheath, cubic regression model, and a single peak curve in female ear.The difference of sucrose content in both stem and female ear is one of the internal powers for filling kernels.Products of photosynthesis in low-leaves play a leading role in early period of growing, while the products in top and middle-leaves play a leading role during the late period of development.Both products of photosynthesis participate in the kernel growing and developing.

Key words: Spring maize, Nutrient physiology, Sucrose