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《Agro-climatic suitability mapping for crop production in the Bolivian Altiplano：A case study for quinoa.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、AgriculturalandForestMeteorology139(2006)399–412www.elsevier.com/locate/agrformetAgro-climaticsuitabilitymappingforcropproductionintheBolivianAltiplano:AcasestudyforquinoaSamGeertsa,*,DirkRaesa,MagaliGarciab,CarmenDelCastillob,WouterBuytaertaaK.U.LeuvenUniversity,DivisionofSoilan
2、dWaterManagement,Celestijnenlaan200E,B-3001Leuven,BelgiumbUniversidadMayordeSanAndres,FacultaddeAgronomia,LaPaz,BoliviaReceived1March2006;receivedinrevisedform25August2006;accepted25August2006AbstractAnagro-climaticsuitabilitylibraryforcropproductionwasgeneratedbyusingclimaticdat
3、asetsfrom20to33yearsfor41meteorologicalstationsintheBolivianAltiplano.Fouragro-climaticindicatorsfortheregionwereobtainedbyvalidatedcalculationprocedures.Thereferenceevapotranspiration,thelengthoftherainyseason,theseverityofintra-seasonaldryspellsandthemonthlyfrostrisksweredeterm
4、inedforeachofthestations.Togetageographicalcoverage,thepointdataweresubsequentlyenteredinaGISenvironmentandinterpolatedusingordinarykriging,withorwithoutincorporatinganisotropy.Thepresentedcasestudyfocusesonquinoa(ChenopodiumquinoaWilld.),animportantcropintheregionthatiscultivate
5、dduringtheshortandirregularrainfallseasonandthatiswelladaptedtothefrequentoccurrenceofdroughtandfrost.TheGISlibrarywasusedtomarkzoneswheredeficitirrigationcouldimprovequinoaproduction.Withadataquery,zonesweredelimitedwheretheirrigationcanbeusefultostretchthelengthofthegrowingseaso
6、nbeyondthelimitsoftherainyseasonand/ortomitigateintra-seasonaldryspells.Determinednetirrigationrequirementswereusedtoassessthevulnerabilityofthedelineatedzones.Tworegionswithahighvulnerability,aseveredroughtriskandanacceptablefrostriskaretheeasternregionoftheAltiplanoandtheinter-
7、saltdepressionregioninthesouth.Together,theyaccountforaroundone-thirdoftheAltiplanoarea.In1yearoutof2,irrigationintheseregionscanstronglyimprovecropproduction.TheuseofirrigationinotherregionsoftheAltiplanowillbelessbeneficialeitherbecausetheirrigationrequirementsarelow(regionaroun
8、dLakeTiticaca),orbecausethefrostriskisto
