细胞汁液浓度、相对含水量对土壤含水量十分敏感，其含量可以反映植株叶片水分状况。
Cell sap concentration and relative water content of leaf change with the irrigation maximum chanage, that can show condition of plant water.
叶片相对含水量、水分饱和亏、自由水、束缚水含量，细胞汁液浓度也同土壤PF值显著相关。
Relative water content (RWC), water saturation defi-cit (WSD), free water, bound water and cell SAP concentration were all correlated with PF.
韧皮部溢泌速率降低伴随汁液中钾离子浓度降低和蔗糖浓度增高。
The fall of phloem exudation rate concurred with a decrease of potassium concentration and an increase of sucrose concentration of sap.
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