Abstract
The effect of soil water stress on the physiology of Sophora japonica Golden stem was studied in order to reduce the irrigation water. The results showed that the growths of the plants were suppressed after treated with flooding for 15 days, which was embodied in the decreasing of qP, ETR, Fv/Fm and the content of pigment, the increasing of the content of MDA and qN. The growth and appearance of plants were suppressed after flooded for 23 days. The drought stress suppressed the growth of plants, which was embodied in the decreasing of qP, ETR, Fv/Fm, the content of pigment, the water content of leaves, the increasing of the content of MDA, qN after treated for 19 days. The qP, ETR, content of pigment were increased after treated with slight drought or middle drought for 19 days. The best irrigation method for Sophora japonica Golden stemin the landscape land was the content of water in the soil between 18% and 30%, which did not affect the growth or landscape effects. The application of S. japonica Golden stem in the landscape and architecture should be avoided in the place which would be flooded for more than 15 days
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