N—二甲氨基琥珀酰胺酸(B_9)在果树上的应用相当广泛,尤其对幼年果树的促花效果显著。但至今对 B_9的作用机理尚未搞清楚。Luc-kwill(1979)认为,B_9有阻碍 GA(赤霉素)的生物合成作用,Reed 等提出 B_9的水解物UDMH(不对称二甲酰胼)抑制了 IAA(喷施吲哚乙酸)的形成。本文对连续5年喷施 B_9后的梨幼树,分析了叶片、果实和新梢内氮、磷、钾、钙、镁和锌、铜、铁、锰等元素的含量,借以探讨 B_9对果树的矿物质营养的影响。 N-dimethylaminosuccinamic acid (B_9) is widely used in fruit trees, especially for juvenile fruit trees. However, the mechanism of action of B_9 has not been clarified so far. According to Luc-kwill (1979), B_9 hinders the biosynthesis of GA (Gibberellin) and Reed et al. Propose that UDMH, a hydrolyzate of B_9, inhibits the formation of IAA (sprayed with indole acetic acid) . In this paper, the contents of nitrogen, phosphorus, potassium, calcium, magnesium and zinc, copper, iron, manganese and other elements in leaves, fruits and shoots were analyzed after spraying B_9 for 5 consecutive years. The impact of mineral nutrition.