青藏公路沿线高寒草甸次生群落特征及生态修复.pdf
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Ó c I | : 1007-0435( 2006) 02-0156-04] ^ L Ú e ¤ Ê Q 3 + # 3 ÿ © ¯鄢 燕1, 2, 张锦华3, 张建国1, 2( 1.Ï S S Ð ý c£ æ ö ¹ ] Ð Ì â ù î î , ¹ + î û `610041;2.Ï S S Ð ý ù î 3 ý , Ø `100039; 3.¹ + j 30 ¢,V ë ä F 100% , 26% bù ¤ a ¤ a¾ 3 a ° © ± þ ] ª ]Hilly slopes of> 30 ¢, covered w ith 100% gravels. The vegetation cover rate is of 26% , w ith specieslike Carex spp. , potentilla spp. , K . cristata, Sanguisorbo spp. et.al dominatingB5 î ¥ Ü r ,¹ V ä F 80% , 10% b ° a¾ 3 © ± þ ] ª ]Accum ulated earth form s into a stretch of mounds w ith a surface of 80% gravels, and a vegetationcover rate of 10% , dominated by Sanguisorbo spp. , Potentilla spp. et. alCÚ N â ¹L and abandoned after sur facesoil being compacted bypassing vehiclesC1 N â ª ,V r $ å Ê ,V ª ± $ % å Ê , N â ñ Ï © ,¹ V ä F V r 80%[ , 10% b¾ 3 aÿ * © ± þ ] ª ]After being compacted with medium pressing force, the surface soil and the vegetation on it had beendestroyed completely. T he surface is covered with 80% gravels. The vegetation cover rate of 10% isdom inated by Potentilla spp. , Lepidium apetalum, and P. annua et.alC2 Ú } ø W ¥ s ,V ª ± $ ' å Ê , N â ñ ^ , 35% b¶ 3 Ø ¤ aw ç { a¾ 3 © ±þ ] ª ]T he top soil and vegetation on it betw een rolling vehicle w heels are basically destroyed, though thepr essing force had been relatively slight. T he vegetation cover r ate of the land is 35% . K . humilis,A rtemisia capillaries, potentilla spp. et. al are the dominant speciesC3 N â ª ,V r å Ê ,V ª ± $ % å Ê ,¹ V ä F r 60% , 16% b* aÿ a¾ 3 aw ç { ©± þ ] ª ]Rolled over and compacted by passing vehicles, the sur face soil and vegetation are destroyed, andcovered with 60% gravels. T he vegetation cover rate is of 16% . P. annua, L. apetalum, potentillaspp. , A . capillaries et. al are the dom inant speciesC4 N â ª » l 1- 2 M à N â ,V r ' å Ê ,V ª ± $ 9 $ å Ê , 20% bß ? a¾ 3 a* a ø © ¤ ± þ ] ª ]Abandoned for years after being compacted by passing vehicles, the surface soil and the vegetation on ithad been destroyed. A total vegetation cover rate of 20% now has Sedum dubium, Potentilla. spp. ,P. annua, Oxytropis spp. et. al are the dominant species157» 2 ù © : ] ^ L Ú e ¤ Ê Q 3 + # 3 ÿ © ¯1. 3 ` ) Ø1. 3. 1 `Ê ¨ × 1 ´ ( Importance value) T ¹ © ·S ,9 Ø T ¹ [ 4] :IV= M á % + M  %+ M Ú %3 ( 1)1. 3. 2 物种多样性测度Ê ¨ Shannon-Wiener · ( H ) aPielou · ( J ) ~ ¶ · ( S) © ¥þ Õ " [ 4] b~ ¶ · S · C " ¹ = ¥þ Õ 9 bH = - null( PilnPi) ( 2)Pi= Ni/ N ( 3)T Ï , Pi ¹ Õ i ¥M × 1 ´ , Ni ¹ Õ i ¥ ' × 1´ , N ¹ Õ i î " Z ¥ò ñ Õ ¥× 1 ´ b( · J ¥9 Ø T ¹ :J= H / lnS= - null( PilnPi) / lnS ( 4)2 `² T Ð s 2. 1 `Q 3 þ Õ F î M ,® ¿ ] ^ ¥¿ y ^ § B ç ë ¥ 7 # { ¥ N â ] A / î ¤ ¹ ¥| Ä bÕ î ª î ¥Q 3 + n V 2 b] ^ § B ç ë ¥ 7 , î ] ¥± ¹ ( V 1) ,® ¿ r Ì â H q ¥¿ M (V r $ À " aìM ) ,r ! s r Õ 0 o ¥h ,P ¤ ± $ë ¯ d È 4 bY V `Ù Ø ° , t ¦ Ë î ¹ (¹ 12 M - ( 1992) ^ ¿ y H L = / ¥ bÜ V 12 M¥1 ë ¯ ª , 9  V [ r 10% j67%, ^ þÕ F î d È e , þ Õ 4 j12Õ ,¹ ð 3 ( A) ¥11% j34% bë ¯ ª ¥ À µ ü A ¥y Õ , [ ¤ ( K oeleria cristata) al * ( Poa calliop sis) a¾ 3 ( Potentilla spp. ) a ° ( Saussurea japoinca)© ¤ Ë ¤ ± þ ¹ ö bY V ] N â ¹ ¥Ø ° , ± $ 9  º r 10% j35% ,± þ þ Õ F î ¯ e , Ç 6 j14Õ ,¹ ð 3 ± $ ¥17% j40% bþ Õ [ l * al = ø ( Oxytropis microphylla) aÿ a¾ 3 aw ç { ©0 e l 3 ± þ ¹ ö bV ü N â V ° ¤ / î ð 3 ±$ v µ § , r þ Ø ² % å Ê ,/ î r ¥Á á Å L ,y 7 ] Å ± þ ô " ¥? Z £ s ¥ Æ 1 , i9 v Ï å @ , 9 ,¤ ¹ ¥| Ä by N N Ö 1 Z 4 ?p , X å Ê ¥¤ ¹ ,Ð E ç Ä ,[ P 1 ë ¯ b I Ó D :[ 1] `R Ð , > ð ) , ¦ ô  , © . ¦ Ë ý ñ ] Ú ð ¤ ¹ null " ¥ Y [ J] . 3 ÿ Ð , 2004, 24( 2) : 384-388[ 2] ` W , ç I 7 , ® ù , © . ] ^ | r Æ Ú e ¤ ð ± $ ¥ë¯ É ñ [ J] . Ï S Ì â S Ð , 2004, 24( 2) : 188-191[ 3] ` 1 Í u r ¹ 5 Ø , 1 Í 。
