农业科技与技术（英文）2025，Vol.26Issue(4)：1-11,11.DOI:10.16175/j.cnki.1009-4229.2025.04.001
不同超级稻品种产量形成与光合特性研究
Yield Components and Photosynthetic Characteristics of Different Super Rice Varieties
摘要
Abstract
To unveil the high-yielding mechanism of super rice,field experiments were conducted with super rice varieties('Xiangliangyou 900','Y Liangyou 900','Y Liangyou 2','Y Liangyou 1',and'Liangyoupeijiu'),which were highly representative in different per unit yield target periods,and a conventional hybrid rice variety('Shanyou 63')at Chunhua Base in Changsha County,Hunan Province.The varieties were compared in terms of material accumulation and allocation,yield components,photosynthetic parameters,and respiration dynamics.The results showed that from the milky stage,the aboveground dry matter of each super rice variety was significantly higher than that of'Shanyou 63'and the dry matter content in the panicles of'Xiangliangyou 900'remained at a high level.The yield of each super rice variety was significantly higher than that of'Shanyou 63'.The phase I super rice variety,'Liangyoupeijiu',expanded the sink capacity by increasing the number of effective panicles,while the yield improvement was limited.The phase II to V super rice varieties achieved high yields through the synergy of panicles and grains.The yield of'Xiangliangyou 900'was the highest,reaching 10.05 t/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-yield varieties'Xiangliangyou 900'and'Y Liangyou 900'maintained higher SPAD values,net photosynthetic rates,and water use efficiency from the full heading to milky stage,demonstrating photosynthetic advantages.There was a peak in the dark respiration rate at the grain-filling stage,and the peak height and duration of higher values were positively correlated with the final yield.关键词
超级杂交稻/品种/产量/产量形成/光合特性Key words
Super hybrid rice/Variety/Yield/Yield formation/Photosynthetic characteristics引用本文复制引用
王美,张灵芝,李建武,鲁湘,张玉烛,卢浩宇,屠乃美..不同超级稻品种产量形成与光合特性研究[J].农业科技与技术（英文）,2025,26(4):1-11,11.基金项目
Supported by the Yuelushan Talent Program(2024RC2041) （2024RC2041）
Natural Science Foundation of Changsha City(kq2502164). 岳麓山人才项目(2024RC2041) （kq2502164）
长沙市自然科学基金(kq2502164) （kq2502164）
