Effect of'Zhenxi'biological selenium fertilizer on Selenium content,yield,quality and disease resistance of Siraitia grosvenorii
The effects of foliar spraying biological selenium fertilizer'Zhenxi'at different growth periods on the contents of selenium and mogroside Ⅴ,fruit grades,the yield per plant and the incidence of main diseases of Qingpi Siraitia grosvenorii in 17 production orchards in the main production areas of S.grosvenorii including Yongfu County,Lingui District and Long-sheng County,etc.were studied.In this study,three selenium spaying schemes were designed,including scheme 1:spaying at seedling period and pre-flowering;scheme 2:spaying at three periods of seedling,pre-flowering,early flowering and young fruit;scheme 3:spraying at the periods of seedling,pre-flowering,early flowering,young fruit and fruit expansion.The result showed that selenium was enriched significantly in three spraying schemes.Selenium content of dry fruit in scheme 1,2,3 was increased by 147.30％,295.44％and 380.90％,respectively,compared to the control.The selenium content in scheme 2 and 3 were 174.27 μg/kg and 182.55 μg/kg(dry weight),respectively,reaching the standards of rich-in-selenium.After spraying'Zhenxi'biological selenium fertilizer on the leaf surface,the percentage of extra big and big fruits was in-creased by 0.68％-16.95％,and the yield per plant was increased by 1.72％-9.59％.The content of mogroside Ⅴ in scheme 1 could be significantly increased.The resistances to virus disease and bud blight were not significantly enhanced in scheme 1 and 2.
NETL
NSTL
万方数据
