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本文采用光电法对滨海盐渍土土壤水分进行了研究。通过室内作标准曲线，室外进行实地测定，表明此法在滨海盐渍土上的测试结果甚为理想；其测定范围为土壤水吸力的５×１０４帕～１．５×１０６帕之间；盐分含量对测定结果影响不大，但土壤颜色对测定结果有很大的影响。此法与经典的烘干法相比，相对误差在５％以下，能直接应用于田间测定或定位观察试验．
In this paper, the photoelectric method was used to study the soil moisture in coastal saline soil. Through the indoor standard curves, the outdoor field measurements show that the test results on the coastal saline soil is very satisfactory; the determination range of the soil water suction of 5 × 104 P ~ 1.5 × 106 Pa; salt Content has little effect on the determination results, but soil color has a great impact on the determination results. This method compared with the classic drying method, the relative error of less than 5%, can be directly applied to field measurement or positioning observation test.