钵育机摆栽杂交粳稻高产高效关键技术分析

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1、～万方数据钵育机摆栽杂交粳稻高产高效关键技术研究————————————————————————————————二_二二二二_===二二二二二二一bowl。seedlingmechanicaltransplanting．WetookahigheststandardwhichthetotaInitrogen279kghm之，thebasicandtilleringnitrogen189kghm～，setthedifferentgradientsofbasicandtilleringnitrogen．Theresultsshowt

2、hat：thedecreaseofthebasicandtlllenngnitrogendecreaseddrymatteraccumulationateachgrowthstageofrice．Itwasnothelpforincreasingthepaniclesandimprovingyieldbydecreasingthebasica11dtil】eringfertilizer·WiththedecreaseofBT，nitrogenuptakeofficeandtheratioofnitrogenuptakeinth

3、eheading。matureperioddecreased，butincreasedtheproportionofnitrogenuptakeintheJointing。headingperiod．TheBTproductivityofgrainsandnitrogenproductivityofgramshadnosignificantdifferencewiththedecreaseofBT，suchastheBTuseefficiencvandnitrogenuseefficiency．Undertheexperime

4、ntalconditions，yieldreducedwiththedecreaseofBT．Buttherewerenosignificantdifferenceinyield，theraftoofnitrogenuptakeintheheading。matteperiod，theBTproductivityofgrainsanditsuseemciencv．nltrogenproductivityofgrainsandnitrogenLlSeefficiencybetweenBT5andBT4．Jnercto。e‘ther

5、e15somespaceonreducingnitrogenfertilizeronrice．AppropriatereductionintheamountofBThasnosignificantimpactonyieldandNUE．F1eldexpenmentswereconductedwithhybridJaponicariceYongyou2640in2013and2014·Wetookconventionalfractionatedfertilizationasacontrol，slow二releasingblend

6、ingfertilizer，polymer-coatedurea，sulfur-coatedureawereappliedasbasalfertilizeratonetime(B·BSRB，B—PCU，B-scu)andasbasalfertilizerwithtopdressingureaat7daysaftertransplanting(BT-BSRB，BT-PCU，BT—SCU)tostudytheefrectsofthemondynamictillers，SPAD，drymatteraccumulation，yield

7、andtheuptakeajldutilizationofn1仃ogenmthesamenitrogenapplication．Theresultsshowthat：ComparedwithCK,underthesinglebasalapplicationofslow-releasefertilizer，tillersincreasedfaster，t11eleafhadhigherSPAD，shoothadmorematteraccumulationintheearlystage，butinthelaterstage．SPA

8、Dsloweddown，andshoothadlessmatteraccumulationatthesulfur-coatedureatreatment，SOitsyieldandnitrogenuseefficiencywerelowerthanCK；SPADincreas