EFFECTS OF NITROGEN DRESSING AT FLOWERING STAGE ON THE CONTENTS OF STORAGE COMPOUNDS OF SOYBEAN (Glycine max.) SEEDS.

大豆（Glycine max. l.v vs. enrei和Tamahomare）植株在开花初期进行硫酸铵处理。收集施氮和未施氮植株的未成熟和成熟种子，比较贮藏化合物的积累情况。脱衣植株成熟种子的蛋白质含量低于脱衣植株。它们的含油量则相反。发育中的Enrei种子在成熟过程中蛋白质含量直接增加，而油脂含量呈凸形增加。从氨基酸、糖和贮藏化合物含量的变化等方面探讨了氮肥处理导致成熟种子蛋白质含量下降的原因。

Soybean (Glycine max.L.cvs.Enrei and Tamahomare) plants were dressed ammonium sulfate at the beginning of flowering stage. Immature and mature seeds were collected from nitrogen dressed and undressed plants to compare the accumulation of storage compounds. Protein contents of matured seeds from dressed plants were lower than those from undressed plants. The reverse was true for their oil contents. Developing seeds of Enrei straightly increased its amounts of protein and convexly amounts of oil in a seed during maturation. The reason for the decrease of the protein content in matured seeds by the nitrogen dressing is discussed with the changes of contents of amino acids, sugars and storage compounds.