徐淮平原農(nóng)林復(fù)合系統(tǒng)小氣候效益研究.pdf

1、Y90毗544分類號(hào)密級(jí)P4632GK南京林業(yè)大學(xué)研究生碩學(xué)位代碼309學(xué)校代碼10298學(xué)號(hào)030249”“一一零士學(xué)位論文；一～。。一。。一一。。一一。。。，，，?！?。。，。j論文題目：徐淮平原農(nóng)林復(fù)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(dǎo)教師：萬(wàn)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