Ginkgo Physiological And Growth Responses Of Selenium

Ginkgo(Ginkgo biloba L.)is a multi-value deciduous tree species which is wildly cultivated for the production of leaves,timber and nuts.The experiment was consisted of two pilots.The two pilots were used to determine the reactions of growth,physiology and biochemistry to Se.Four Se content levels and three different fertilizations were employed in PilotⅠ,and one-year-old seedlings of 14 Ginkgo F1 hybrids were used in PilotⅡ.The two pilots were carried out under greenhouse conditions.The objective of the PilotⅠwas to seek the optimal combination ratios of applying Se on the content and fertilization,and the optimal ginkgo species of the PilotⅡ.The results of PilotⅠwere achieved as follows:Generally speaking,to be possible to promote the ginkgo growth,enhance the content of chlorophyll and untaken of mineral nutrients;increase the content of flavonoids,lactone and other secondary metabolites.The leaf surface spurring and compound application were better than the soil fertilization of the three types of facilities selenium way of comparison, Of the Mr Shi Shi and mixed in a good root facilities,four selenium concentration of comparison,15mg/pot＞9mg/pot "6mg/pot＞30mg/pot.By comprehensive evaluation can be drawn,Selenium 12 facilities with the order of 15-M＞15-L＞9-L＞15-R＞9-M＞9-R＞6-R＞30-L＞6-M＞30-R＞30-M＞6-R＞CK facilities in three ways and selenium four facilities Se ratio,and to 15-M 15-L best.Generally speaking,within a certain range of Ginkgo biloba to enhance selenium content of chlorophyll and mineral nutrient uptake,increased flavonoids,lactone and other secondary metabolites by HPLC to promote growth.Because of the experimental strains Ginkgo genotypes differences So all the indicators of trends and changes there are certain differences, But on the whole,have indicated selenium can improve the quality of ginkgo.In Se1 processing conditions,the performance of the outstanding line of 2-1,3-1,1-CK,2-5.Se2 deal with the conditions,the performance of the outstanding line of 1-1,2-1,1-2,3-4.Se3 deal with the conditions,the performance of the outstanding line of 1-1,1-2,2-1,3-4.Se4 deal with the conditions,the performance of the outstanding line of 2-2,2-1,3-4,2-5.Se5 deal with the conditions,the performance of the outstanding line of 2-5,2-1,3-2,2-2.Most strains of ginkgo in the concentration of selenium were administered Se·L-1,physiological and growth indexes higher;Five facilities in selenium concentration,the outstanding performance of strains 1-1,2-1, 2-2,2-5.