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依据8年田间和盆栽试验,分析了冬小麦基因型、密度和供水对水分利用效率(WUE)的影响.结果表明:当供水量变化范围较大时,总耗水(ET)和WUE呈显著线性负相关,ET对WUE的负效应明显大于产量(GY)对WUE的正效应.GY和ET有正相关趋势.当供水量变化范围较小时,GY和WUE呈显著线性正相关.蒸散效率(ETE)和收获指数(HI)都和WUE有正相关关系,ETE对WUE的贡献大于收获指数(HI),ETE和HI不表现稳定相关.密度对WUE的影响较小.基因型间WUE及其组分存在明显的差异.高WUE基因型的首要条件是高产,低产基因型的WUE也较低.在适宜供水量下,通过拔节前控水,合理密度及高产节水基因型的选用,可实现高产和高WUE的相对统一.
The effects of winter wheat genotype, density and water supply on water use efficiency (WUE) were analyzed based on 8-year field and pot experiments.The results showed that the total water consumption (ET) and WUE were significantly linear when the water supply varied widely Negative correlation, the negative effect of ET on WUE was significantly greater than the positive effect of yield (GY) on WUE.GY and ET had a positive correlation trend.When the range of water supply was small, there was a significant linear positive correlation between GY and WUE.Evaporation efficiency (ETE ) And harvest index (HI) both had a positive correlation with WUE, the contribution of ETE to WUE was greater than the harvest index (HI), ETE and HI did not show stable correlation, and the effect of density on WUE was less. The WUE of high WUE genotype was lower than that of low genotype WUE.With the appropriate water supply, the pre-jointing water, reasonable density and high yielding water-saving genotypes Realize the relative unity of high yield and high WUE.