利用DPS数据统计软件,对II优航2号的6个产量构成因素进行多元逐步回归分析、相关分析、通径分析以及Eberhard and Russell模式分析。结果表明,穗数对II优航2号产量的作用最大,结实率和穗实粒数对产量也有较大影响。高产栽培策略是在确保足够有效穗的前提下,适度促大穗,提高结实率。笔者还对该组合的丰产稳产性进行分析,结果表明,II优航2号丰产性、稳产性及适应性都优于对照,是一个较为理想的迟熟杂交稻新组合。 Using DPS data statistics software, we conducted multiple stepwise regression analysis, correlation analysis, path analysis and Eberhard and Russell pattern analysis on six yield components of II Youhang No.2. The results showed that panicle number had the greatest effect on the yield of II Youhang No.2, and the seed setting rate and grain number per panicle had great effect on the yield. High-yielding cultivation strategy is to ensure adequate panicle spike, moderate spike, improve seed setting rate. The authors also analyzed the high and stable yield of this combination. The results showed that the yield, stability and adaptability of II Youhang No.2 were better than the control, which was an ideal new combination of late maturity hybrid rice.