【摘要】 通过对贺兰山封山育林育草项目区 87块监测样地 4年来的调查 ,确定并分析了 4年的样地地类变化 ,结果表明 :封育区植被得到有效恢复 ,总的规律是疏林地向森林转化 ,宜林荒山地向灌丛地再向灌木林地转化 ;对照区植被遭到严重破坏 ,总的规律是疏林地和森林基本保持不变 ,灌木林地向疏林地再向宜林荒山地转变更多还原

【Abstract】 Based on the four-years investigation and land-typeidentification of 87 monitoring Sample plots in the Helanshan mountain forest-grass conservation Project area of Sino-Germany cooperation Ningxia shelter-forest Project, the land-type Changes in the four years were analysed, The results show that the vegetation in the forest conservation area was rehabilitated effectively and the general trend was that the thin stocked land was changing towards forest, waste hill land suitable to afforestation was changing towards shrub land and further towards shrub forest land. In the control area, the vegetation was seriously destroyed and the general trends was that the thin stocked land and the forest remained unchanged and shrub forest land was changing towards thin stocked land and further towards waste hill land suitable to afforestation.更多还原