研究草原开垦对草原土壤及植被的扰动作用。
The disturbance ecological effect of reclamation on soil and vegetation of grasslands is studied in this paper.
禁止毁坏森林、草原开垦耕地，禁止围湖造田和侵占江河滩地。
It is forbidden to reclaim cultivated land by destroying forests or grasslands, to reclaim land from lakes and to encroach on tidal-flat areas of rivers.
在19世纪80年代，美国中部的高地平原大草原是由农民和牧场主开垦的。
The vast grasslands of the High Plains in the central United States were settled by farmers and ranchers in the 1880s.
本项目鼓励以往开垦坡地上草原、树木和灌丛的自然再生。
The project encouraged natural regeneration of grasslands, tree and shrub cover on previously cultivated slope-lands.
后来由于过度放牧、开垦粮田和持续干旱，西北草原进一步遭到破坏，袭击北京的沙尘暴增加到一年十多次。
After that, overgrazing and ever-lasting drought had further devastated northern west prairie.
第四十六条禁止开垦草原。
因此，在草原干旱区开垦农田，应以秋耕为主要耕作方式。
Therefore, autumn ploughing should be applied as a major pattern of cultivation in the farmlands in dry pasture regions.
开垦草原对草原土壤及植被均有不同程度的扰动作用。
Grassland reclamation disturbs the soil and vegetation in grasslands in varying degrees.
严禁在草原和森林毁草毁林开垦耕地。
Destruction of grass and trees in grasslands and forests for the reclamation of cultivated land shall be prohibited.
严禁在草原和森林毁草毁林开垦耕地。
Destruction of grass and trees in grasslands and forests for the reclamation of cultivated land shall be prohibited.
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