本文以三组龄级的银杏实生苗作为试验材料，研究了不同的年龄、密度和施肥量

In this paper, three groups of Ginkgo biloba seedlings were used as experimental materials to study the effects of different ages, densities and fertilization on the yield of ginkgo biloba leaves, total flavonoid content, and economic yield. The membership function method was used to analyze and evaluate the main results. (1) The leaf yield, total flavonoid content and economic yield are significantly different among different treatments, among which the seedling age significantly affects the yield of dry leaves per mu and the total flavonoid content in the leaves, but the effect is opposite, resulting in the seedling age not affecting economic yield Large; density significantly affects dry leaf yield and economic yield, but has little effect on flavonoid content; fertilization significantly increases leaf yield and economic yield, but has little effect on total flavonoid content. (2) The effects of different treatments on the yield of ginkgo biloba leaves, total flavonoid content and economic yield are mainly caused by the single factors of age, density and fertilization, but the interaction effect of composite factors is not large. (3) Combined with the evaluation of the membership function and the actual production, the better treatments A1B1C4, A2B1C2, A2B1C4, A1B1C2, A1B1C3, A2B1C3 were selected. In summary, young seedlings should be used under medium-density B1 conditions, and appropriate addition of fertilizers should not only increase leaf yield and flavonoid content, but also increase economic yield to achieve increased yield and quality in leaf gardens.

In this paper, the effects of different ages, density and fertilization on Ginkgo biloba yield, total flavonoid content and economic yield were studied, and the main results were as follows: (1) there were significant differences in the yield of inter-treatment, total flavonoid content and economic yield, among which the seedling age significantly affected the yield of dried leaf mu, the total flavonoid content in the leaf, but the effect was not affected by the opposite effect of the opposite effect on the yield of the dried leaf mu, the total flavonoid content in the leaf. The density had a significant impact on dry leaf yield and economic yield, but had little effect on flavonoid content, and fertilization significantly improved leaf yield and economic yield, but had little effect on total flavonoid content. (2) The effects of different treatmentons on Ginkgo biloba yield, total flavonoid content and economic yield were mainly caused by the single factors of age, density and fertilization, while the interaction effect of composite factors was not great. (3) Combined with the evaluation of the membership function and the actual production, the better processing A1B1C4, A2B1C2, A2B1C4, A1B1C2, A1B1C3, A2B1C3 were selected. In summary, the production should be based on the medium density B1 conditions of young seedlings, and the appropriate fertilizer application not only to increase leaf yield and flavonoid content, but also to improve economic output, to achieve the increase in yield and lifting of leaf garden.

In this paper, three groups of age class seedlings of Ginkgo biloba were used as experimental materials to study the effects of different age, density and Fertilization on the yield, total flavone content and economic yield of Ginkgo biloba leaves. The main results were as follows: (1) there were significant differences in leaf yield, total flavone content and economic yield among different treatments, among which seedling age significantly affected the yield The yield per mu of dry leaves and the content of total flavonoids in leaves have opposite effect, which results in that the seedling age has little effect on the economic yield; the density has a significant effect on the yield of dry leaves and the economic yield, but has little effect on the content of flavonoids; fertilization significantly improves the yield of leaves and the economic yield, but has little effect on the content of total flavonoids. (2) The effects of different treatments on the yield, total flavone content and economic yield of Ginkgo biloba leaves were mainly caused by single factors such as age, density and fertilization amount, but the interaction effect of composite factors was not significant. (3) Combined with the evaluation of membership function and production practice, the better treatment of a1b1c4, a2b1c2, a2b1c4, a1b1c2, a1b1c3 and a2b1c3 are selected. To sum up, it is necessary to increase the yield and flavonoid content of leaves, and increase the economic yield of leaves garden under the condition of medium density B1.<br>