优化水肥和传统水肥对冬小麦生长发育及产量的影响

Effects of the Optimized Irrigation-optimized Fertilization and the Traditional Irrigation-traditional Fertilization on Growth,Development and Yield of Winter Wheat

在优化水肥条件下,冬小麦生育进程与传统水肥一致,株高、单位面积总茎数、叶面积指数和干物质积累量的动态变化与传统水肥差异不明显,物质生产结构优于传统水肥处理,主茎上四叶总叶面积略有减少,其基部节间长度明显缩短,穗下节间增长,穗数略微增加,穗粒数减少,收获时千粒重优势显著,最终产量略高于传统水肥。

The critical growthdevelopment stages of the optimized irrigationoptimized fertilization was the same as the traditional irrigationtraditional fertilization,and there was no significant difference in dynamic changes of plant height,the tiller number per unit area,LAI,DMW between the optimiaed waternitrogen measure and traditional waternitrogen practice.The wheat treated by the optimized waternitrogen measure showed superior matter production structure,slightly reduced total area of flag leaf,2nd leaf,3nd leaf and 4nd leaf from top,predominantly shorter base internode length,longer internode length under ear,the slightly more ear number,the fewer grain number per ear,heavier weight of 1 000 grains and a trifle higher grain yield level than the wheat managed by the conventional waternitrogen way.