【摘要】 运用野外调查和室内模拟试验相结合的方法,研究了黔中石漠化地区不同植被类型下的土壤抗冲性。结果表明:随着植被从草坡到乔林方向恢复,土壤物理性质得到改善;根系固土作用能够提高土壤抗冲性能;地表径流量的顺序基本是:乔林<灌木<草坡;土壤侵蚀模数的变化规律也是乔林<灌木<草坡;5°时,枯落物阻滞径流的效果明显,≥15°以上,则效果并不明显;当坡度相同时,枯落物厚度增加,枯落物阻滞径流的净延时也逐渐增加。可见,随着黔中石漠化地区植被的结构恢复,土壤抗冲性将得到增强。更多还原

【Abstract】 Using methods of field investigation and laboratory simulation test to study the soil anti-scouribility of different types of vegetation in dolostone desertification area in middle Guizhou.The results showed that with the vegetation restored from grass to forest,soil physical properties were improved;the soil reinforcement of roots can enhance soil anti-scouribility;the order of surface runoff amount was forest<shrub<grass slope;the variation rule of soil erosion modulus also was forest<shrub<grass slope.The block effect of forest litter to runoff was obvious when gradient was 5° and not obvious when gradient was 15° or more.When gradient was the same,the net delay time of forestry litter block runoff gradually increased with increasing thickness of forestry litter.Therefore,soil anti-scouribility was enhanced with vegetation ecological function restoring.更多还原