超级稻新组合II优航2号产量结构及增产途径分析

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

and Approachs of its Yield Increase

This paper analyzed the correlation,regression and path relationship of 6 traits with the yield trait in II Youhang 2,based on of two-year data of Fujian regional variety trials.The results showed that number of effective panicles most importantly factor to grain yield;as well as seed setting rate and fertile spikelets per panicle kept closely relation with the grain yield.Cultivation strategy for high yield should be taken to accelerate tiller to ensure enough effective panicles.And the path analysis on yield stability and adaptability indicated that II Youhang 2 had higher and more stable yielding ability and wider adaptability.