Refers to the geological era Zeng Fansheng some time, widely distributed, but now limited to localized, small number of possible extinction of the biological. Such as the giant panda and metasequoia. Also known as relict biological.
Seedling stage scaffolding needed shade and keep the seedbed moist. Softwood cuttings is appropriate to make cuttings in May ~ July proceed. High pressure can be in the spring at the base of annual robust branches proceed. Seedlings should be transplanted after the leaves or buds sprout next spring before. Lifter must not hurt the root bark and buds, this long-lateral, lateral branches can be proper pruning, planting requires a large flat bottom hole, seedlings are root development and root given enough irrigation water. Application Value
Translated by Google
动物“活化石”
(1) In the case of captivity, because they live alone or few together, in proestrus and sexual maturity can not participate in social interaction, inherited congenital sexual behavior can not be acquired forward induction, stimulate and learning, and difficult to achieve as well as termination of development.
In the wild, pandas stallion and females usually are living solitary lives, each individual activity range of about 4-7 square kilometers, so it's usually by a scattered population composed of individuals, each individuals are perched in the same environmental conditions, sharing the same area food sources and constraints interdependence between naturally combined into a unified whole.
