徐淮平原農(nóng)林復合系統(tǒng)小氣候效益研究.pdf

1、Y90毗544分類號密級P4632GK南京林業(yè)大學研究生碩學位代碼309學校代碼10298學號030249”“一一零士學位論文；一～。。一。。一一。。一一。。。，，，。～。。，。j論文題目：徐淮平原農(nóng)林復合系統(tǒng)小氣候效益研究作者：趙忠寶專業(yè)：水土保持與荒漠化防治研究方向：林業(yè)生態(tài)工程指導教師：萬福緒教授二OO六年六月ThemicroclimateeffectsofagroforestrysysteminXUHUAIplainareasA

2、bstractThepaperhasanalysedmicroclimatechangesindifferentphonologicalperiodsanditseffectOilphysiologyoutputandqualityofcropsbyfixedfieldobservationinpoplarcropintercroppingandshelterbeltinXUHUAIplainagroforestryThemaincon

3、clusionsCanbedrawnasfollows：(1)Indifferentphonologicalperiodsofwheatandpoplar，comparedtotheCK，thelightintensityismuchlowerinagroforestrysystemFromLeafexpansionperiod，omnileafperiodtoLeafflourishingperiod，theratioofthelig

4、htintensityinagroforestrygraduallydecreasedCloserfromtreerowlowerthelightintensitywas，whichdecreasedwithtreespacingdiminishingthelengthoftreeshadeandillmnatinghourshadcloserelationwiththesolaraltitudinalangle，treeheighta

5、ndtreespacingAndtheequationbetweenthetreeshadowlengthandtimewasestablished(2)Theaveragewind，airtemperature，soiltemperatureinagroferestrysystemWassmallerthantheCkTheaverageproctectioneffectwas357％～579％inpoplar—cropintercr

6、oppingandwas214％～438％inshelterbeltAtinternodepullingstageofwheattheaverageairtemperaturewasdecreasedby05inpoplarcropintercropping，andby13inshelterbeltDuringwheatseedfillingandsoybeanflowering，theaverageairtemperaturewasd

7、ecreasedbyl7inpoplar—cropintercroppingandby13inshelterbeltThelowestsoiltemperaturewashigherthantheCKIndifferentphonologicalperiods，therelativehumidityinpoplarcropintercroppingWasincreasedby38％～65％andby5％～57％inshelterbelt

8、Thesoilmoisturewasdifferentapparentlyindifferentphonologicalperiods，whichhadarelationwithrainfall(3)Thelightintensityairtemperature，soiltemperature，wind，relativehumiditysoilmoistureweremainlyecologicalfactorsinagroforest

9、rybyprincipalcomponentanalysisDoublefactorsanalysisofvarianceofthemicroclimatefactorsshowedthepoplar7Sphonologicalandtreespacinghadobviouseffectonthemicroclimate(4)Theagroforestrysystemhadeffectontheplantheight，paniclele

10、ngth，outputandqualityofwheat，soybeanandriceWheretreespacingwassmallerandclosertoforestbelts，theeffeCtwasgreaterandeffectonsoybeanandriceWasmoreobvious(5)Intheagroforestrysystem，therelationshipbetweenPhotosynthesisandmicr

11、o—climatearegreat，thechangeofphotosyntheticratearesmooth，andthepeakofphotosyntheticrateturneduplaterthantheCKWhereitWasclosertoforestbeltstheinfluencesonphotosyntheticrateweregreaterTreespacingsandlocationshadinfluenceso