华西雨屏区四种植被恢复模式水土保持效益分析

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1、四川农业大学硕士学位论文vegetationwasthat：TK>TN>TP．ItshowedthattherestoredvegetationremarkablyreducedthesurfacerunoffandnutrientslOSS．3．Thetotalorganiccarbon(TOC)，inorganiccarbon(IC)andtotalcarbon(TC)ofsurfacerunoffwasstudied，anditshowedthatTOC，ICandTCinthenmoffinplatationsofN

2、eosinocalamusaff；niwerethemaximal，ArundinariaamaratooksecondplaceandGryptomeriafortuneiwereminimum．TherewereobviouscorrelationbetweenTOCandrainfall(p

3、ganiccarbonwasanindextoscalethesoilfertility．TheamountofTOC，ICandTCofsurfacerunoffintheplantationofGryptomeriafortuneiwerethelowest．SotheplantationofGryptomeriafortuneicouldbebestpatternforthevegetationrestoration．4．Thesoilphysicalpropertiesofrestoredvegetationpatt

4、ernswerestudied，theresultsshowedthat，thesoilbulkdensityofallthevegetationpatternswasdecreased．AmongthemArundinariaamaraWasthelowest，andGryptomeriafortuneitooksecondplace．Throughtheanalysisofsoilphy’sicalnaturewhichincludedsoilporosity,non—capillaryporosity,capillar

5、yporosity,waterholdingcapacityandcapillarywaterholdingcapacity,itshowedt11atArundinariaamarawasthebestpattem，alltheaboveindexwereincreased．Theaboveresultsshowedthatsoilstructurewaschanged,soilbuⅡ【densityWasincreasedandthesoilmoistureWasaddedbytherestorationofvegeta

6、tion．5．Theanalysisofsoilnutrientsincludedhydrolysablenitrogen，totalnitrogen，availablephosphorus，availablekalium，totalkaliumandorganicmatterWasconducted．TheresultsshowedthatheamountofsoilnutrientinArundinariaamarapattemwasthehighestamongallthekindofrestoredvegetatio

7、n．ThatofGryptomeriafortuneiandBetulaluminiferatooksecondplace，andthatofslopefarmlandwasthelowest．Thesoilnutrientandorganicmatterwereincreasedfrom2006to2007．Thisshowedthat：thevegetationrestorationhadafavorablefunctionforsoilnutrient．Andthevegetationcouldbegotmoreand

8、morenutrientsfromthesoilconditionandavoidwaterandsoillosingalongtheslope．IV四川农业大学硕士学位论文Inaword，intherainyzoneofwestChinatheplantationofArundinari