当植物的蒸腾量超过吸水量时,就会产生内部的水分亏缺。这种现象的产生可能是由于过多的失去水分、或水分的吸收量减少、或者二者的共同作用所引起的。按照水分亏缺的程度和持续时间,可区分为暂时萎蔫和永久性萎蔫。早期的暂时姜蔫是由于细 When the plant transpiration exceeds the water absorption, it will have an internal water deficit. This phenomenon may be due to excessive loss of water, or reduce the absorption of water, or a combination of the two caused. In accordance with the extent and duration of water deficit, can be divided into temporary wilt and permanent wilting. The early temporary ginger 蔫 is due to fine