次生裸地

次生裸地的恢复保护是目前世界范围内对生态环境的保护和改善的一个重要组成部分。

The recovery and protection of secondary bare area is an important composition of the protection and improvement to the environment in the world round .

鼠荒地是害鼠破坏草原植被以后形成的次生裸地。

Rats wasteland is the secondary bare land of grassland on which vegetation is damaged by rodent .

尽管南极洲98%的土地都被厚厚的冰覆盖着，但岩石表面仍然有一些次生裸地。

Although ninety-eight percent of Antarctica is covered by thick ice , there are bare patches where the rocky surface shows through .

随着经济的不断发展，开发建设过程中大量采挖活动对土壤和植被产生了剧烈扰动和破坏，导致大量的次生裸地和水土流失现象。

Great numbers of excavation activities in social development and construction lead to serious perturbation and damage , and result in large amount of secondary bare land and soil and water loss .

这片因人为因素形成的次生裸地经过20多年的自然恢复，入侵定居植物只有24科59属66种，且大多数均为禾本科、莎草科、菊科等科的草本植物种类；

After an 20 years ' natural succession , there have colonized only 66 species of vascular plants belonging to 24 families and 59 genera on the completely barren oil shale disposal soil .