刺槐木质部栓塞脆弱性检测的方法比较

安瑞,孟凤,尹鹏先,杜光源

Comparison of methods for detecting vulnerability of xylem embolism in Robinia pseudoacacia

AN Rui,MENG Feng,YIN Peng-Xian,DU Guang-Yuan

表1 基于不同方法计算出的刺槐导水率损失50%时的张力(P50)

Table 1 Tension at 50% hydraulic conductivity loss (P50) in branches of Robinia pseudoacacia calculated based on different methods

栓塞脆弱性曲线的建立方法 Methods in establishing embolism vulnerability curves P50 (MPa) 样品数 Number of samples 茎段长度 Stem length (cm) 来源 Source Sperry离心机法 Sperry centrifugation method -0.93 ± 0.021a 6 27.4 -0.92 ± 0.058a 6 14.4 自然干燥法 Bench top dehydration method -2.91b 31 Cochard Cavitron 离心机法 Cochard Cavitron centrifugation method -0.38 ± 0.044c 6 27.4 -0.46 ± 0.030d 6 27.4 Dang et al., 2017 -0.22 ± 0.026e 6 27.4 Li et al., 2016