| Because of the study on leaves of Ginkgo Biloba becomes one of hot spot on plant exploitation nowadays,cultivation of leaf-producing of Ginkgo has been attaching great importance in home and abroad.Based on the simulated and formula application of magnesium,zinc and molybdenum,performed in green house with two-year-old Ginkgo seedings,the effect of nutrients on the growth and the leaf quality of ginkgo was discussed.And the optimum application of magnesium,zinc and molybdenum nutrients for different indicators was finally defined in this paper with established regression models.The main conclusions can be drawn as follows:1 Effects of magnesium, zinc and molybdenumApplication of Zinc had remarkable effects on leaf biomass,seedling height and branches of ginkgo.Application of molybdenum had remarkable effects on leaf biomass and seedling height.The most accelerative growh of Ginkgo seedlings can be expected,when the application of magnesium, zinc and molybdenum nutrients is in the range of 1.66～1.94%,0.25%,0.1～0.11% respectively.Application of magnesium and zinc had remarkable effects on root activity,chlorophyll content,soluble sugar content and soluble protein content. Application of molybdenum had remarkable effects on root activity,chlorophyll content and soluble sugar content. The most accelerative physiological indicators of Ginkgo seedlings can be expected,when the application of magnesium,zinc and molybdenum nutrients is in the range of 1.39～2.01%,0.08%,0.07～0.10% respectively.Application of zinc and molybdenum decreased nitrate content.Application of magnesium,zinc and molybdenum application increased flavonoid content in Ginkgo leaf.Application of magnesium increased Mg and Zn content in Ginkgo leaf. Application of zinc increased Zn and Mo content in Ginkgo leaf.Application of molybdenum increased Mg and Mo content in Ginkgo leaf.The most accelerative leaf quality of Ginkgo can be expected,when the application of magnesium,zinc and molybdenum nutrients is in the range of 1.32～2.46%,0.21～0.42%,0.07～0.12% respectively.2 Effects of combination of magnesium, zinc and molybdenumThe most accelerative growh of Ginkgo seedlings can be expected,when the application of magnesium,zinc and molybdenum nutrients is in the range of 2.93～2.95%,0.01～0.48%,0 respectively. The most accelerative application of magnesium,zinc and molybdenum is respectively defined as 2.92%,0.47%,0.19%,when the greatest root activity can be expected;3.00%,0.49%,0, when the greatest chlorophyll content can be expected; 0,0.16%,0.19%,when the greatest soluble sugar content can be expected; 1.49%,0,0.01%, when the greatest soluble protein content can be expected.The most accelerative leaf quality of Ginkgo can be expected,when the application of magnesium,zinc and molybdenum nutrients is in the range of 0.14～2.99%,0.17～0.50%,0 respectively. |
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