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1、AbstractAbstractBaDanwoodisalsocalledBaDanApricot.ItsformalnameisAmygdaluscommunisL.belongtoLiyaKeTao,It’samedium-sizedarbororshrub.Duetoclimateandmanyotherreasons,AmygdaluscommunisL.distributioninourcountryisverylimited.ShacheCounty,inXinjiangproviecs,hasnaturalconditionsforAmyg
2、daluscommunisL.’sgrouth,plantingAmygdaluscommunisL.hasalonghistory.Butinrecentyears,duetocyclicallowtemperature,someAmygdaluscommunisL.evenfreezetodeath,resultingintotaldestruction.Thestudyfind3mostwidelyplantedAmygdaluscommunisL.communislsample,analysisfreezingthroughlowtemperat
3、ureexperimentalresearch.Atthesametime,inordertomakeafurtherexplorationtoAmygdaluscommunisL.’sfreezingindicationandtoanalysistheriskoffrostdamage.wemakeareaseachtotheAmygdaluscommunisL.’sfreezingandalsoconsiderthe50yearsmeteorologicaldata.Themainresultsareasfollows:1.Analysistheex
4、trememiniumtemperature,lowtemperature,precipitationduringthefrostdamageofAmygdaluscommunisL.in2006and2008’swinter,combinedwiththechangesofthefreezingindexthehistoricalperiod(1961-2009).WegettheindicatorsofAmygdaluscommunisL.ShacheCounty:(1)TheAmygdaluscommunisL.willsuffermildtomo
5、deratefrostdamagewhentheaveragetemperatureinwinterisloweredthannormalyear,andtheday’sloweresttemperatureisbelow-18℃andtherewasacontinuousprocess.(2)TheAmygdaluscommunisL.willsurfermoderatefrostdamagewhentheaveragetemperatureisloweredthannormalormoreyearandtherewascoolweather,also
6、theextrememinimumtemperaturereached-21℃andtheloweresttemperature≦-21℃.(3)Inwintertheaveragetemperaturelowerthannormalyear,andsignificantprecipitationassociatedwiththeprocessofcooling,whentheextrememinimumtemperature≦-23℃continuetheAmygdaluscommunisL..willsufferseriousfrostdamage.
7、2.Temperatureandrelativeelectricalconductivityhasalinearrelationship.Therelativeelectricaconductivityisincreasedwhenthetemperaturedecreasedandlowtemperatureincreaseandwhenthethedegreeofinjurywillincreased.Logisticequationwasused:a24testsampleofthelethaltemperaturebetween-32.702℃~
8、-23.105℃,theYingjisha2’sforcetofightagai
