Journal of Hunan Ecological Science

【Objective】It is to investigate the effects of selenium applications on the selenium content, yield and medicinal constituents content of Lonicera macranthoides. 【Method 】Using the excellent variety ‘Jincuilei’ of Lonicera macranthoides as the test material, the method of foliar spraying sodium selenite was adopted to design the spraying selenium concentration of 0, 50, 100, 150, 200, 250 mg / L and the number of times of spraying were 0 times, 1 time, 2 times, and 3 times. The selenium content of dried flowers, fresh flower yield, contents of chlorogenic acid and lignoceroside in dried flowers of different spraying selenium concentration and spraying times were determined. 【Result】The selenium content of dried flowers, fresh flower yield, contents of chlorogenic acid and lignoceroside in dried flowers were significantly increased after selenium application, and spraying selenium concentration of 150 - 200 mg / L significantly increased by 192. 42% -231. 82% , 53. 14% -70. 29% , 16. 32% -19. 51% , and 14. 61% -21. 35% compared with that without selenium, and spraying selenium twice significantly in- creased by 226. 23% , 63. 41% , 21. 45% , and 22. 31% compared with no selenium. Fresh flower yield, dried flower chlorogenic acid and lignoceroside content all showed an increasing and then decrea- sing trend with increasing selenium spray concentration and number of selenium sprays, and there was a similar trend between the dried flower selenium content and selenium concentration, with an increasing trend of dried flower selenium content with increasing number of selenium sprays. 【Conclusion】Selenium application can significantly increase the selenium content and yield of Lonicera macranthoides, and im- prove the quality of dried flowers. The optimum spraying selenium concentration is 150-200 mg / L, and the optimum number of selenium sprays is 2 times, that is, selenium sprayed once at the stage of pre- flower bud differentiation and once at the stage of bud initiation.

Lonicera macranthoides; selenium application; yield; medicinal composition; selenium content