膜下滴灌栽培模式對(duì)綠洲棉田土壤有機(jī)碳組分特征影響.pdf

1、新疆農(nóng)業(yè)大學(xué)碩士學(xué)位論文膜下滴灌栽培模式對(duì)綠洲棉田土壤有機(jī)碳組分特征影響姓名：唐光木申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：土壤學(xué)指導(dǎo)教師：盛建東20090601TheInfluenceofPlantModeofFilmDripIrrigationontheOrganicCarbonFractionsCharacteristicinOasisCottonFarmlandAbstractWatershortageinXinjianghasalwaysbe

2、enthemajorlimitingfactorsoftheeconomicandsocialdevelopment，Dripirrigationundermulchisanadvancedtechniquecombinedbythewatersavingirrigationtechniqueandthefilmmulchingplantingtechnique，whichalsothemaintrendinXinjiangagricu

3、lturaldevelopmentInthecomprehensiveeffectoffilmmulchinganddripirrigation，thewaterandfertilizerecologicalenvironmentofsoilphysics，chemistrymicrobialenvironmentetcandthecropgrowthhavechangedHoweveroBrpreviousstudiesmainlyf

4、ocusesonsoilwaterandsaltmovement，wateruseefficiencytemperature，yield—increasingmechanism，aswellastheeconomicandsocialbenefitsinthedripirrigationundermulch，andthestudyoforganiccarbonisalsomainlyfocusesonhumuselementcompos

5、ition，functionalgroupssnucl=u1eandproperties，butthestudybetweenorganiccarbonactivefractionandphysicalfractionationcarbonpoolwerelackedInthispapertakescottonsoilastheresearchobject，usestheorganiccarbonfractiontechnologyde

6、velopingtheinfluenceofdripirrigationundermulchcultivationmodelonvariationcharacteristicsoforganiccarbonfractionincottonsoil，andstudyingonthecorrelationbetweentheinterorganiccarbonpoolwithsoilfertilityandyield，toinvestiga

7、tethevariationlawoforganiccarboninthedripirrigationundermulch，andconclusionthat：(1)Comparedwithnaturalsoil，thesoilorganiccarbonshowincreasetrendbydripirrigationundermulchandconventionalirrigationin6～8a，significantlyincre

8、asedby67％112％，anddecreasedafter6～8aTillageatthenaturalsoilwithloworganiccarbon，canincreasethestorageofsoilorganicandimprovetheproductivityofthefarmlandbyirrigation6～8awhichwillbeasuitabletillageandirrigationyears，andthes

9、oilofoasisfarmlandmaybecomepotentialcarbonsinkAfter6～8a，thesoilorganiccarbonofoasisfarmlandshoweddecreasedtrend，andthecultivatedlandfertilityexistingdegradationrisk(2)Comparedwithnaturalsoilandconventionalirrigation，drip

10、irrigationundermulchcultivationmodelimprovedthesoillabileorganiccarbon(LOC)，microbialbiomasscarbonandcarbonmanagementindex(CMI)，andrespectivelyincreasesbyallaverageof37％1005％and32％，enhancedtheactivityandshortentheturnove