提高四川玉米单产的思考（四川省农科院作物所成都６１００６６）刘永红自本世纪７０年代以来，大幅度提高单产已成为玉米生产的重要特色．近年国内外出现了不少高额丰产典型，但其重演性和广普性很差。说明现今人们对玉米高额丰产技术和规律还摸的不透，许多问题仍处于模... Increasing Yields of Maize in Sichuan Province (Institute of Crop Sciences, Sichuan Academy of Agricultural Sciences, Chengdu 610066) Since the 1970s, a substantial increase in yield has become an important feature of maize production. In recent years, there have been many high-yielding models both at home and abroad, but their repetition and broadness are very poor. It shows that today people are still far behind in the technology and laws of high-yielding corn, and many problems are still in the mold.