超高产杂交稻生育后期形态特征与生理特性.研究

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1、maintained1argerphotosynthesisareainitsripeningphase．Meanwhile，theplanttypeofLiangyoupeijiuwasbetterthanthatofthecontr01s．A11thesetraitsenabledittoenhanceitsefficiencefors01arenergyutilizationand10dgingresistance．2．Thephotosynthetictraitsandsencencepropertleso士super—highyieldhybridAsc

2、omDaredtoShanyou63and93ll，thephotosyntheticrateofLiangyoupeijiuinflagleafwas13．5％and14．6％hi曲errespectivelyinheadingstage，while16．6％and16．1％higherrespectivelyatmaturegrainstage．ThecontentofchlorophyllandsolubleDroteinaswellastheactivityofsuperoxidedismutase(SOD)ofLiangyoupeijiudecrease

3、dm。reslowlythanthoseofthecontrols25and30daysafterheadingstage．Atthes锄estages，thecontentsofs01ublesugarandtheactiVityofDeroxide(POD)ofLiangyoupeijiuwerehigherthanthoseofcontr01s，andthecontentofmalonaldehydicacid(MDA)was10werthanthatofthecontrols．Soinflag1eafLiangyoupeijiuexhibitedmores

4、tron91yactivityofinneractiVeoxygeneliminatingenzyme，sloweraging，higherphotosyntheticrate．andmorestron91yphysi0109icalactiVityandDhotosyntheticcapabilitythanthoseofthecontr01s．A1lthesewereusefultoaccumulatemorephotosyntheticsubstance1nripeningphaseofLiangyoupeijiu．3．Thegrainfillingrate

5、and，exportrateofculm—sheathsubstanceofsuper—highyieldhybridriceGraindrysubstanceofShanyou63accumulatedquicklyduringtheearlystage，butitstoppedearly．TheweightofthelVgrainsstartedtodecreaseon21stdayafterheadingforShanyou63，butitstartedtodecreaseon25thdayafterheadingstageforLiangyoupeijiu

6、．Itshowedthetimeofgraindry{啼葺’t写d彳10{冲^√’§套j聋一-一叫嚣专聿薯寺哇喜葛毛重蕃j等紊§南’雾奄蓠芎畸与d茸f若专iL雩d鼋ii’葶菲鼍6f蓦聿与耳±写。吝’若彳亍而一韩彳若专写彳乏再≮寺彳冲彝五鼍蕃拈。两一番麓?碱j窍H。乔该；#∥菲p扣；曩荔抄寺采宇导。舀÷oo寸一F喜孝I芎}∥蠢蕞彳鲁麓等薯i?o；，Shanyou63，and9311．ThereasonforlowerdrysubstancetranslocationofLiangyoupeijiucomparedwiththecontrolSwasthatthecu

7、lm—sheathdrysubstanceweightdecreasedfromheadingstage，butitstartedtoriseagain21stdayafterheadingstage．TheofLiangyoupeijiuhadplumpness，whilefunction1eavesagedmoreslowlyandmaintainedstrongerphotosyntheticcapability．Meanwhile，culm-sheathdrysubstanceofShanyou63and9311keptexportinga11thetim

8、eSOth