Drought-resistant physiological characteristics of Several kinds of xylophyte which distributed in Za Gu-nao valley of MinJiang River had been measured. The test — xylophyte were 5 kinds of arbors with higher survival rate and keeping rate— Cupressus chengiana , Pinus radiata, Ailanthus altissima , Robinia pseudoacacia , Ulmus pumila L. and 4 native shrub species—Sophora davidiana , Convolvulus tragacanthoides, Bauhinia faberi var. microphylla , Artemisia gmelinii .With studying the physiological indexes of...