凋落物對(duì)紅松洼草地自然保護(hù)區(qū)植物多樣性的作用機(jī)制.pdf

1、中國(guó)農(nóng)業(yè)大學(xué)碩士學(xué)位論文凋落物對(duì)紅松洼草地自然保護(hù)區(qū)植物多樣性的作用機(jī)制姓名：楊麗申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：植物學(xué)指導(dǎo)教師：邵小明李連芳2002.5.1^塑苧塑型塾竺矍苧墊旦竺堡芝墾墊塑墨堂竺塑堡旦墼墅————————一AbstractThereisalargeamountoflitterinhigh—productiveecosystem，low‘decomposeecosystemorbothLittercarlimprovethep

2、hysicalandchemicalpropertyofsoil，promotetheenergyflowandnutrientcycleTheresearchesonlittermostlyfocusontheaccumulationoflitteritselfnowandtherearefewresearchontheeffectofthelitteroiltheplantdiversityThisresearchinvestiga

3、tedtheeffectoflitterontheplantdiversityfromanewpointofviewAccordingtotheresearchin2000，2001inHongsongwagrasslandnaturalreserve，aconclusioncanbedrawn：Thereisalargeamountoflitter(about300g‘m吐)accumulatedinthecoreareawhichi

4、scompletelyenclosedandtheplantdiversityreducedinthethisarea；Thereisanamountoflitteraccumulating(about22g’m。)inthebufferareainwhichthegrassiscutonceperyearandtheplantdiversityinthethisareaislargerthanthatinthecorearea；the

5、amountoflitterinexperimentareaisverylow(nearly0g‘m。)becauseofovergrazing，andplantdiversityisverylowInthisresearchthedifierentgradientlinerwasdistributedinthefieldandtheamountoflitterbywhichtheplantbiodiversitykeepsthelar

6、gestis100g’m。Thelittermakestheplantbiodiversitychangebychangingthemicroenvironment(iewaterandheatsituation)Thepaperdidtherelevantresearchabouttheeffectoflitteronsoilwatercontentanddrewtheconclusion：theamountofsoilwaterco

7、ntentbywhichplantbiodiversitycankeepthelargestinHongsongwagrasslandnaturalreserveis：03cm：50％；36cm：46％；69cm：40％TheresearchprovidesthenewtheorybasisforthesustainablemanagementmodelofgrasslandnaturalreserveKeywords：litterna