Leaf Growth and Medicinal Quality of Ginkgo Seedling with Spraying Mg,Zn,Mo Fertilizers Effects of Continuous Cropping on Photosynthesis and Medicinal Quality of Pseudostellariae heterophylla HPLC-UV fingerprint and medicinal quality evaluation of saponins from plants of varieties of Hedera helix Effects of fertilization on growth physiology, yield and medicinal quality of Schizonepeta tenuifolia Briq. Effects of combining application of Mg, Zn and Mo fertilizers on leaf biomass and medicinal quality of ginkgo seedlings Effect of environmental factors on photosynthetic physiology and flavonoid constituent of Scutellaria baicalensis