Abstract:

In the whole growth period of tomato, according to soil moisture characteristics, full used of limited water resources and regulated soil moisture. Used TDR to study the yield and soil water dynamics of greenhouse tomato by different irrigation times of some irrigation amount. The result showed that: the depth of soil water dynamics changes by different treatments was 0-100 cm, and the change of depth 0-60 cm was best fury. The change of depth 100-180 cm was not distinctness. By soil moisture migration to be divided, there were 4 layers divided by the vertical variation of soil moisture: the active layer (0-30 cm), sub-active layer (30-60 cm), graded layer (60-100 cm) and stable layer (100-180 cm). Irrigation times less then consumption of soil moisture more, led to the active layer and the second active layer of the soil water deficit easily. The more number of irrigation on soil the moisture consume less, could easily lead times active layer of soil moisture deficit.