Five soil exchangeable sodium percentages (ESP) of 0, 5, 10, 20, 40 and four soil water contents(w/w) of 0.05, 0.10, 0.20, 0.34(saturated) were tested.

• 试验处理采用5种土壤碱度(土壤可交换钠百分比ESP=0、5、10、20、40)和4种土壤质量含水率(0.；05、0