| Aimed to explore proper moist ure env ironment for the crop, under three kinds of soil moisture, five treat-
ments of soil aeration (1.6，1.2，0.8, 0.4 and 0 tube ventilation quantity of 50% porosity of soil ) were installed and
the physiological indices of tomato and water use efficiency were studied . The results showed that the adequate combina-tion of soil moisture and soil ventilation quantity could increase the plant growth， root vitality and water use efficiency markedly. Under 70%~80% field capacity and 0.8 tube soil ventilation quantity，the gnowth rate, stem diameter, LAI and chlorophyll content were 14.34%, 22.39%, 23.95% and 29.98% higher than the control respectively and the root vitality reached the highest value of 13. 440 mg/ (g·h)，being 61. 55% higher than that ［8. 319 mg/ (g·h)］ of the control. In this condition, the water use efficiency of tomato was 16.97 % higher than the control. |