植物水分利用策略及其阈值研究进展

植物水分利用策略是植物对环境适应性的体现，植物种类、生长阶段以及生长季节都是影响植物水分利用策略差异性的重要因素。由于降雨量以及植被覆盖的差异性，土壤水分对于降雨的响应以及阈值也具有明显的差别，植物生理特征及其阈值也会随着水分供给的变化而产生波动。文中阐述了目前植物水分利用策略、植物生理特征对水分的响应及其阈值、土壤水分对降雨的响应及其阈值3个方面的研究进展，并对今后多方法、多角度以及深入进行植物水分利用机理研究做出展望。

Research Progress in Plant Water Use Strategy and Its Threshold

Water use strategy is the reflection of plants adaptability to environment. Plants species, growth stages and growing seasons are important factors to the difference in plant water use strategy. Due to the difference of rainfall and vegetation cover, soil moisture differs in its response to rainfall events and the threshold also shows obvious difference, and plant physiological characteristics and its threshold will fluctuate with the water supply changes. The paper describes the research progress in three aspects, i.e., water use strategy of plants, the response of plant physiological characteristics to water and its threshold, and the response of soil moisture to rainfall and its threshold, and then prospected the research on the multiple methods and the mechanism of plant water use in the future.