Evapotranspiration efficiency(ETE) and harvest index (HI) were positively correlated with WUE, but Contribution of ETE to WUE was greater than that of HI. No correlation between ETE and HI was revealed.

• 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.