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ID:33323459
大小:6.87 MB
页数:45页
时间:2019-02-24
《东北地区耕地资源的分析及对粮食生产影响的研究》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、万方数据AbstractFoodsecurityisalwaysamatterofnation’ssecurity,whichincludesthestabilityoftheregime,thepeaceofthepeopleChinahasbeentherepresentativeoffarmingcivilization.NortheastChinaisoneofthethinemaingrain-producingal'easinChina,whichprovidesthehighestgrainfoodandthehighestgraincom
2、modityratetothecountry.Itplaysanimportantsupportingroletoprotectthenationalfoodsecurity.Cultivatedlandisthebasisofgrainproduction.Thechangeofcultivatedlandresourceshassignificanceinfluenceonthedevelopmentofgrainproduction.ThispaperlakescultivatedlandresourcesinNortheastChinaasthe
3、objectofstudy,tocarryoutitsimpactonfoodproduction.Theresulthasgreatsignificancefortheprotectionofcultivatedlandresourcesandfoodsecurityfromthistimeforth.Thepaperusefieldinvestigationmethod,mathematicalstatisticsandliteratureinduction,thequantityandqualityofcultivatedlandresources
4、wereanalyzed.Wearriveatthefollowingreviews:1.Thecausefortheincreasingnumberofarablelandisagriculturalstructureadjustmentandlanddevelopment.2.Themainreasonforthereductionofcultivatedlandisecologicalrestorationandconstructionoccupancy,Astheamountofcultivatedlanddecreasedmorethanthe
5、cultivatedland,thetotalamountofcultivatedlandinNortheastChina'soverallisdwindling.ThequalityofcultivatedlandinNortheastChinaisnotoptimistic,butthedecreasingqualityoflandhasbeenreversed.Inrecentyears,thequalityofthesoilfertilityofthecultivatedlandpresentsapotentialofrestorativeasc
6、ent.Thepapersystematicallyanalyzesthecultivationarea,yield,totaloutput,plantingstructureofthegraincropsinNortheastChina.TheresultsshowthatthesownareaofgraincropsandthetotalgrainoutputofgramcropsinNortheastChinaarefluctuatinggreatly.Itsgrowthrateissignificantlyhigherthanthenationa
7、laverage.TheyieldofgroincropsinNortheastChinaisgreatlyimproved,significantlyhigherthanthenationalaverage.Butasforgraincropyield,especiallythestabilityofcomyieldispoor,whichmeansvolatilityisobvious.Wheatproductionstatusfellsharply,soybcanproductionstatustendstofallaswell,whilether
8、iceproductionincreasedobviously,coinprod
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