资源描述：
《短季棉技术经济效益评价（short season cotton technology economic evaluation）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、短季棉技术经济效益评价（Shortseasoncottontechnologyeconomicevaluation）ShortseasoncottontechnologyeconomicevaluationTianjinCitySeedManagementStationZhangCunxinAbstract:Thispaperdiscussesthebasicconcepts,typesandcharacteristicsofshortseasoncotton;theeconomic,ecologicalandsocialben
2、efits,Toevaluatethetechnicalandeconomicbenefitsoftechnologyeffectandpotentialrole,mainlyanalysesthecurrentproblems.TostudyandputforwardthefutureShortseasoncottontolocalconditionsandmoderatedevelopment,breedingnewvarietiesofearlymaturing,highyield,qualityandresistance
3、,improvethecultivationtechniques,Countermeasuresofminingproductivity.ThecharacteristicsofashortseasoncottonTheso-calledshortseasoncotton,thenamesuggests,isatypeofcottonplantingingrowingperiodisrelativelyshort,inparticularenvironmentalconditionsUndercertainsocialandec
4、onomicconditionsandthelevelofscienceandtechnologytoadapttotheformationanddevelopmentoftheset,varietycharacteristicsandCultivationTechniquesInoneoperationsystem.Hasthevarietycharacteristicsandcultivationfeatures.(a)shortseasoncottonecologicaltypesbecauseofChina'svastt
5、erritory,ecologicalandenvironmentalconditionsvarygreatlyindifferentareas.Therefore,differentcottonTherearecorrespondingtotheshortseasoncottonecologicaltype,canbedividedintothreetypes:oneistheearlymaturinginNorthChinaecotype.IntheareaofshortAsthespringseasoncottoncott
6、onplanting;thetwoistheYellowRiverbasinecological.Isanewtypedevelopedin80s,alsoknownasthesummercotton.MainlyusedforWheat(oil,fertilizer)twocropsofcotton.FromMay25thtoearlyJunethreeisasmallridgeplanting;YangtzeRiverBasinecological.Includingwheat(oil)aftertransplantingC
7、ottonandwheataftercotton(oil)two.Butnow,withlarge,barleyandRapeaftertransplanting.(two)thecharacteristicsofshortseasoncottonvarietiesofshortseasoncottonvarietycharacteristicperformanceinmanyways,comprehensiveanalysis,mainlyinthefollowing.Surface:oneistheshortgrowthpe
8、riod.Earlygrowthanddevelopmentprocessfaster,generallyduringthewholegrowthperiodin120days.Thewholegrowthperiodrequiredmorethan10DEGC
