重点设计基地北部退化区的开发。
Focus development in degraded area at northern part of site.
草甸草原、典型草原样地各土层对照区土壤密度均低于重度退化区。
The soil density of control area of every soil layers of four sample plots in the meadow steppe and typical steppe is lower than the severe degeneration area;
报告指出，全球115亿公顷植被生长区中，约有24%已然经历了由人类活动引发的土壤退化，尤其因土壤流失造成退化。
About 24% of 11.5 billion hectares of vegetated land has already undergone human-induced soil degradation, in particular through erosion, the study says.
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