银杏(maiden-hair tree)

Ginkgo genus, perennal deciduous fruit trees, trees. Also known as white fruit, grandson tree, duck palm tree. The name Pinkgo biloba L.is one of the remaining species of the 4th century glacial period. It is a special product of China. North to Shenyang, south to Guangzhou, east of the coastal provinces, west to southern Gansu, Sichuan, Ya'an and other areas below 1000m above sea level, Guizhou, Yunnan Teng Chong altitude of 2000m below, are distributed. Shaanxi Zhou to Louguantai a ginkgo female plant, the age of the tree has reached about 2000 years old. An ancient ginkgo in Shandong Province has been around for more than 3000 years. Ginkgo has a long life span and many ancient trees that are more than a thousand years old. The tree is up to 40m and all hairless. Male and female strains; male plants erect tall, leaf fat, deep cracking, with a short branch of the male flower sequence length of 1-4cm; female branches open or hanging, leaves sparse and thin, cracked less and shallow, short fruit branches 1-2cm long.the young bark pale gray-brown, shallow split; Leaf fan shape, leaves light green, leaves before turning yellow, with a long leaf handle. For the naked plant female flower has two embryo beads born on the long handle, generally only one fruit; the seed is nuclear fruit-like; the outer seed skin flesh, yellow; the inner seed bone, white, about 2.5cm long; the seed is light green, is a positive tree species, suitable for the windward sun and light enough places to plant. Deep roots, drought-tolerant, air pollution has a certain resistance. The soil conditions are not strict, it is best to have good drainage, deep soil layer, loose and fertile sandy loam, acidic soil pH of 4.5 or lime soil pH of 8 can be adapted. It is growing well in areas with mild climate, average annual average of 10-18 degrees C, low temperature of more than 20 degrees C, and annual precipitation of 600-1500mm.there is only one variant of Ginkgo: G.biloba var.pendula Carr.), G.biloba var.lacinia Carr., G.biloba var.au Beiss.), G.biloba.var.carr.varieties can be classified into three main types: (1) plum ginkgo. (2) Buddha hand ginkgo. (3) Horsebell Ginkgo.China cultivates ginkgo as a fruit tree, and other countries mainly as a trail tree or tree. Reproduction can be used by methods such as live birth, sub-plant, grafting, etc. Ginkgo roots occur a lot of germination, can be sub-breeding, from the young trees to dig the female root planting, reliable, about 10 years to start the results. Grafting with live seedlings or sub-plant seedlings for birch. Planting, to configure a small number of male plants for pollination trees, by manual collection of pollen, 500 times the water, plus 0.1% boric acid, 1% sucrose, spray, can increase production by 20-50%.Ginkgo disease is very few, common are: stem rot, moths, ferns, ferns, golden turtles and woodworms, termites.Ginkgo contains 9.1g of water per 100g dried fruit,
protein
13.1g, carbon water
compounds
71.2g, calcium 19.6mg, phosphorus 427mg, iron 2.9mg, in addition to nucleotin, nich acid, thiamine and so on.