洛旱3号的丰产性、稳产性、抗旱性及产量结构分析

The Analysis of the Prolificacy,Yielding Dependability,Drought Resistance and Production Structure of the Wheat Breed Luohan3

对1999—2004年的区域试验和生产试验结果进行统计分析，结果表明，洛旱3号是一个丰产稳产、抗旱性突出的旱地小麦新品种，在产量结构三要素中，单位面积穗数对产量的贡献最大（0．93577），穗粒数次之（0．74201），干粒重最小（0．49476），洛旱3号的高产栽培技术途径是在保证足够穗数的基础上，提高小穗结实率，增加穗粒数，稳定干粒重，充分发挥其丰产性能。该品种的品种＊地点互作变异系数与对照相当，产量与环境的回归系数接近于1或大于1，在5250～6000kg／hm^2肥力水平下表现最好。

The statistic analysis of the regional experiments and production experiments on the wheat breed Luohan3 from 1999 to 2004 showed that the new breed had high prolificacy, strong yielding dependability and drought resistance. Among the three elements of the production structure, the number ears per square contributed the most to the production （0. 93577） ; the grains for each ear the second（0. 74205） ; and the weight of one thousand grains the least. Therefore, the best way to gain high yield is to take the advantage of the breed＇s high yielding property, that is, to ensure the adequate ears, to increase the grains in every ear, and to stabilize the weight of one thousand grains. The recessive ratio of the breed production and environment is near one or over one, and the breed reaches its highest yield when the soll fertility is 5252 - 6000kg/hm^2.