最新Unit7亚洲水稻生态系统教学讲义ppt.ppt

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1、Unit7亚洲水稻生态系统Unlikemanyothercrops，riceisgrownindiverselandandwatermanagementsystems.Therefore，tillagepracticesforlandpreparationinricevaryconsiderablystartingwiththecultivationpractices．Thecultivationpracticesforricedifferwiththericeecosystemsandarebroadlycategorizedasfollows：Wordstoremember1、

2、tillage['tɪlɪdʒ]n.耕作，耕种tillagepractices：耕作方式2、landpreparation[农学]整地3、cultivation['kʌltə'veʃən]n.培养；耕作；耕种cultivationpractices：栽培方式4、riceecosystem：水稻生态系统Wordstoremember12、favourabletemperature:适宜温度13、unfavourabletemperature：不适宜温度14、tropical['trɑpɪkl]adj.热带的15、zone[zon]n.地带16、temperate['temp(ə)rə

3、t]adj.温和的；适度的tropicalzone：热带temperatezone：温带Improvedricecultivarsthathavebeendevelopedforirrigatedricelandsareofshortdurationandareresponsivetonitrogenfertilizer,andincorporateresistancetoseveralbiologicalstressesandsometolerancetoadversesoils.Itischaracterizedbyhighcroppingintensityandintensi

4、veuseofagrochemicals．Wordstoremember17、duration[du'reʃən]n.生育期，持续的时间18、nitrogenfertilizer：氮肥19、biologicalstress：生物逆境20、croppingintensity：种植密度21、agrochemical[,æɡrokɛmɪkl]n.农用化学品Productionconstraintsinlow(1essthan3tha-1)andmediumyield(3-5tha-1)areasaredelayedplantings,shortageoflabour,useoflowto

5、mediumpotentialvarieties,lowinputrates,poorinputmanagement,poorweedmanagement,inadequatewatersupply,unavailabilityofirrigationatoneormorecriticalstage,salinity/alkalinityproblem;associatedpoordrain-ageandenvironmentalstresses.Wordstoremember22、constraint[kən'strent]n.约束；限制23、salinity：[sə'lɪnət

6、i]n.盐度；盐分；盐性24、alkalinity[,ælkə'lɪnəti]n.碱度；碱性25、drainage['drenɪdʒ]n.排水；排水系统Problemsassociatedwithhighproduction(morethan5tha-1)areasareyieldinstabilityduetopests,multiplecroppingsystems-delayingtransplantingandenvironmentaldegradation.Wordstoremember26、instability[,ɪnstə'bɪləti]n.不稳定，基础薄弱27、m

7、ultiplecroppingsystems：多熟制种植28、transplanting：移栽mechanicaltransplanting机械化移栽Rainfedlowlandricegrowsinbuddedfieldsthatarefloodedforatleastpartofthecroppingseasontowaterdepthsthatdonotexceed50cmformorethantenconsecutivedays．Rainfedlowlands