文档介绍：摘要本研究以宁夏退化草场与草场甘草费源为对象,采用草原标准调查法等方法,草场覆盖疫、密度、高度、频度、,同时研究了同栏条件下,甘草补播补植、采挖方法等对甘草资源恢复及甘草质量的影响,得到如F结果: +骆驼蒿一绵蓬类型区、老瓜头~甘草+三芒草+骆驼蒿类型区、黑沙蒿一沙蓬+狗尾草+苦豆子类型区与红砂一细弱隐子草一虱子草+冠芒草类型区四种类型,其中甘草一刺蓬+骆驼蒿一绵蓬类型区、老瓜头一甘草+三芒草+。 。退化草场围栏后的平均植被覆盖度由2002 %,%,%。 kg/亩, 提高到2004年的217 8kg/亩,%。 。经过3年围栏封育,退化草场甘草覆盖度、甘草密度和甘草蓄积量与围栏前相比,均有大幅度提高。至2004年,l号围栏甘草覆盖度比2002 年增加29%;甘草密度比2002年增加100%:%。 ,采挖后压埋水平根茎并立即回填土壤,可减少草原生态破坏,保证甘草正常生长。 ,带动牧民增收和促进退化草场恢复的治理模式。关t词围栏植被恢复甘草利用 Abstract This research was carried out inNingxia province。and the study objects were regression grassland and liquorice resourc￡,Based on theinvestigation ofplants and naturalenvironment,such as soilconditions,we studied the effectofEnclosure plemental sowing on therecovery of regression grassland and fieldliquorice resource,the effectofreasonable digging and utilization means offtherecovery ofgrassland and liquorice quality were also main results ale as fo¨OWS: 1。The experiment area can bedivided intofour main lw,otypes thatmainly buildby iquorice ale fit tocarry outliquoriceproduction. isveryimportant totherecovery ofregression mean value ofplant cover degree was increased from */0(2002)%(2004)by %.Theproduction ofgrass was alsoincreased from (2002)to 217,8kg/mu(2004)by %. 3,Enclosure isvery important t0theprotection and recovery ofliquorice three years cover degree,density and stock ofliquorice were allincreased,To theyear of 2004,the cover degree,density andstockwereincreasedby29%,100%and %,respectively. ofwild Liquorice is alternate plant excavating with excavate big plant and leave small plant,which damage grassland area leastand alleviatethepress onthegrassland ecosystem through car