The influence of humic acid fertilizer on the content of the flavonoids in the ginkgo biloba leaf

The content of flavonoids in ginkgo biloba leaf influenced by humic acid fertilizer(HAF) was studied in this article. The result showed that: Using fertilizer or not had significant influence on the content of flavonoids in the leaf of ginkgo biloba. At the same nutrition level, the flavonoids content treated by the HAF was higher than what was treated by the chemical fertilizer (CF). There was a significant quadric relationship between the content of flavonoids in ginkgo biloba leaf and the dosage of HAF. And there was a proper dosage which was 645 kg/hm~2,under this treatment, the content of flavonoids in ginkgo biloba leaf was the highest, and had significant difference from other treatments′.