中国水稻科学2024，Vol.38Issue(4)：422-436,15.DOI:10.16819/j.1001-7216.2024.231116
施氮量与移栽密度对小粒型杂交水稻产量形成的影响
Effects of Nitrogen Application Rate and Transplanting Density on Yield Formation of Small Seed Hybrid Rice
摘要
Abstract
[Objective]To elucidate the yield formation characteristics of small-seed hybrid rice.[Method]Zhuoliangyou 0985(small-seed hybrid rice variety)and Fengliangyou 4(control variety)were utilized as materials for a field experiment at varying nitrogen application rates(0,N0;180 kg/hm2,N1;210 kg/hm2,N2)and densities(26.7 cm×20.0 cm,D1;20.0 cm×20.0 cm,D2;20.0 cm×16.7 cm,D3)[Result]The leaf area index(LAI)and leaf SPAD values of the two varieties increased with nitrogen application rate,with no significant difference between N1 and N2,but significantly higher than N0 treatment.The dry matter output rate of stems and sheaths decreased with rising nitrogen application,while leaf matter output rate followed the opposite trend.Grain yield of both varieties increased with increasing nitrogen application,with no significant difference between N1 and N2.Among different density treatments,D2 generally yielded higher results.Under N0 treatment,Zhuoliangyou 0985 had significantly higher yield than the control variety,while under nitrogen application conditions,both varieties had equivalent yields.[Conclusion]The yield formation characteristics of Zhuoliangyou 0985 include smaller leaf area,more grains per panicle,larger sink-source ratio,noticeable photosynthetic advantages during mid to late grain filling stages,higher post-flowering substance accumulation and transport rate of stem and leaf substances,higher harvest index,and increased yield under nitrogen-deficient conditions.In the context of this experiment,N1D2(180 kg/hm2,20cm×20cm)emerged as the optimal treatment for Zhuoliangyou 0985.关键词
小粒型杂交稻/氮密互作/产量形成/物质转运/源库特性Key words
small-seed hybrid rice/nitrogen-density interaction/yield formation/material transport/source sink properties引用本文复制引用
吕宙,易秉怀,陈平平,周文新,唐文帮,易镇邪..施氮量与移栽密度对小粒型杂交水稻产量形成的影响[J].中国水稻科学,2024,38(4):422-436,15.基金项目
国家重点研发计划资助项目(2023YFD2301400) （2023YFD2301400）
国家自然科学基金资助项目(U22A20502). （U22A20502）
