The Germ Plasma Resources and Biological Characteristics Analysis of Chinese Chichied Ginkgo

This paper made chichied ginkgo as research material, mainly researched on its characteristics of distribution, growth, and regeneration, besides, the relationship between chichied ginkgo and habitat. The results showed that, there were more than 348 plants of chichied ginkgoes in our country, which mainly distributed in 19 provinces and 236 （67.82% of the total）plants of them were in southwestern China areas, including Guizhou, Yunnan, Sichuan and Chongqing. There were 271 plants were female, which accounted for 80.18% of total. The height of chichied ginkgo was 10-40 m, DBH was 1.0-3.0 m, ages were 100-2000 years, and the crown diameter was around 10-30 m. The chichi overhangs the tree branch, tree trunk or the base of the tree in cone shape, grows vertical downward and the top of the tree was covered by tree bark. Most of the young chichi ginkgoes were yellowbrown color, and then gradually changed to silver gray, finally became dark gray when they were matured. Chichi could be divided into branch chichi, trunk chichi and base chichi according to its insertion position. The chichi ginkgo could be regenerated in large quantities after it was cut down. However, chichi ginkgo only happens on a certain annual precipitation and sunshine hours.