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

大豆(Glyine Max.L.cvs.Enrei和Tamahomare)植株在开花初期喷施硫酸铵。从施氮和不施氮的植株中收集未成熟和成熟的种子，以比较贮藏化合物的积累。包衣植株成熟种子的蛋白质含量低于未包衣植株。它们的含油量正好相反。在成熟过程中，Enrei种子的发育直接增加了种子中蛋白质和油的含量。通过氨基酸、糖和贮藏物质含量的变化，探讨了氮肥处理降低成熟种子蛋白质含量的原因。

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.