采用播期、密度、大田施氮量 3因素 3水平正交设计对华安 2号进行高产栽培技术研究 ,观察了品种特性 ,并根据品种特性探讨了该组合的高产栽培措施 The high-yielding cultivation techniques of Huaan 2 were studied by orthogonal design with three factors and three levels of sowing time, density and field application of nitrogen. The characteristics of cultivars were observed and the high-yielding cultivation measures