不同超级稻品种产量形成与光合特性研究

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中图分类号：S511 文献标识码：A 文章编号：1006-060X（2025）06-0001-07

引用格式：，等.不同超级稻品种产量形成与光合特性研究[J].湖南农业科学，2025（6）：1-7.DOI：10.16498/j.cnki.hnnykx.2025.006.001

Yield Components and Photosynthetic Characteristics of Different Super Rice Varieties

WANG Mei¹， ZHANG Ling-zhi¹，LI Jian-wu2³，LU Xiang³， ZHANG Yu-zhu³，LU Hao-yu2³，TU Nai-mei （1.ColegeofrooHnicuualUsits8，;.nHridiceserchte 410125，PRC;3.HuangpuResearchInstituteofLongpingAgricultural ScienceandTchnology，Guangzhou570o，RC）

Abstract：This studyaims tounveil thehigh-yielding mechanismofsuper rice.Field experiments wereconducted withthe super ricevarieties（Xiangliangyou9oo'，YLiangyou9oo'，Yiangyou2'YLiangyou1，and'Liangyoupeijiu），whichwrehighly representative indifferentperunit yieldtarget periods，andthecommonhybridrice variety'Shanyou63'attheChunhuaBase in ChangshaCountyofHunanProvince.Thematerialaccumulationandalocation，yieldformationcharacteristics，photosythetic physiological parameters，andrespiration dynamics werecomparedamong diferentvarieties.Theresultsshowed thatthesuperrice varietieshadsignificantlyhgherabovegrounddrymaterthan'Shanyou63'afterthemilkymaturitystage，andthepanicledrymater of'Xiangliangyou9Oo'maintaiedataighlevelThesupericevarietieshadsignificantlyhgheryieldsthan'Shanyou63Teyield improvementofLiangyoupeijiu'（whichenhancedsinkcapacitythrough increasedefectivepanicles）bredinpaseIwasrelatively limited.The superrice varieties bred in phases I-Vthat balanced panicle number and grain numberper panicle demonstrated higher yields.'Xiangliangyou 9oo' had the highest yield （10.05t/hm2） ，which was 2.97%-28.52% higher than those of other super rice varieties and 32.41% higher than that of'Shanyou 63'. The high-yielding varieties 'Xiangliangyou 900' and 1Y Liangyou 900' kepthigher SPADvaluesnetphotosyntheticrate，and wateruseeffciencyfromthefullheadingstage tothe milymaturitystage， showcasing excelentphotosyntheticperformance.Therewasadistinctrespirationpeak indarkrespirationduring thegrain-flling stage.Both the duration and intensity of this respiration peak showed positive correlations with the rice yield.

Keywords：super hybrid rice;varieties;yield; yield formation; photosynthetic characteristics

水稻（OryzasativaL.）是我国重要的粮食作物之一，在过去的几十年里，我国水稻产量得到了极大提高。（剩余10333字）