Qualitative Division Of Ginkgo Biloba In Hunan Province

Ginkgo biloba is the single species, single genus and single-family plant, only surviving in China after the Fourth Ice Period, so the living fossil and the panda in plant kingdom name it. The origin and distribution center of the world is in China, where it has long history and widespread cultivated areas. It's becoming a focus on account of its important botanical value, economic value, edible and pharmacological value, especially of its fruit and extractions, useful compositions are ketone and terpene, from the leave. Because of lack of scientific and system division, introducing and cultivating Ginkgo biloba is unrealistic, which lead to heavy losses. Quality division is first introduced to forestry in this thesis. And quality division of Ginkgo biloba in Hunan province is fulfilled. The division is based on chemical component of kernel and leave and morphological and economic characteristics of seed. The measured factors are protein, fat, starch, sugar, ketone, terpene, arid weight, kernel percentage and shell thickness. The variation coefficient and similarity is analyzed by using software SPSS and relative mathematical method, and the best origin planting area of single factor is suggested, which offer theory basis for Ginkgo biloba production. According to ketone content in leave, the whole province is divided into four districts, namely Shimen-Fenghuang, Anhua, Xinning-Xinhua and Taojiang, arranging in high content to low content order. Samely, according to ketone content, the whole province is divided into four districts, namely Taojiang, Shimen-xinning, Xinhua-Fenghuang and Anhua.