陇东旱塬区小麦茎秆含水量与产量和水分利用效率的关系

在甘肃省陇东黄土高原通过试验分析不同品种冬小麦茎秆含水量、籽粒产量、水分利用效率（WUE）的差异，探讨旱作条件下茎秆含水量与产量和WUE 的关系。结果表明，不同基因型冬小麦之间产量、WUE、植株含水量存在显著差异，随着灌浆过程的进行植株含水量呈下降趋势。小麦抽穗期茎秆含水量与籽粒产量和水分利用效率显著相关，但灌浆中期茎秆含水量与籽粒产量和水分利用效率相关不显著。

Relationship Between Yield and Water Content of Wheat Stem and Water Use Efficiency in Loess Plateau of East Gansu

The differences of grain yield,water use efficiency（WUE）and water content of stem in various genotypes of dryland winter wheat were studied with twelve winter wheat genotypes in Loess Plateau of East Gansu under dryland at heading stage and mid-filling stage . The results showed that significant difference among genotypes were found in grain yield,WUE and water content of stem . The water content in stem decreased with grain filling proceeding . The correlation between water content of stem with grain yield and WUE was significant at heading stage but was not significant at mid-filling stage . Therefore,the water content of stem can be used by breeding programs as a potential selection criterion for grain yield and WUE in wheat.