作物研究2024，Vol.38Issue(1)：1-9,15,10.
光照、氮素对杂交水稻干物质积累、分配和产量形成的影响
Effects of Photo and Nitrogen on Yield,Yield Composition,Dry Matter Accumulation and Distribution of Hybrid Rice
摘要
Abstract
In order to increase the rice yield in the karst moutainous area of Southwest China,the effects of light,nitrogen and their interactions on dry matter accumulation,transport and yield formation of hybrid rice were studied by using the split-plot experimental design,and the main factors of shading after flowering(natural light and shading 40%),and nitro-gen fertilizer as the secondary factors(90,180 and 270 kg/hm2)were used to study the effects of light,nitrogen and their interactions on the accumulation,transport and yield formation of hybrid rice.The results showed that at the same level of nitrogen fertilizer,post-anthesis shading 40%could significantly increase dry matter transport volume,transport rate and contribution rate,but also significantly reduce post-anthesis dry matter mass,total dry matter mass,harvest index and seed setting rate.Finally,the actual yield of rice was significantly reduced by 27.0%and 31.3%.Under the same light condi-tion,the application of nitrogen fertilizer could significantly increase the number of effective panicles,total spike lets per u-nit area,dry matter accumulation and transport,harvest index and yield.Under the condition of low light,the application of nitrogen fertilizer could increase the amount of dry matter transfer,transport rate,contribution rate and total spikelet num-ber,and the total dry matter quality,harvest index and seed setting rate increased with the increase of nitrogen application rate,thus reducing the yield loss caused by low light after an thesis.Therefore,in the southwest low light area,properly in-creasing the application of nitrogen fertilizer and expanding the population and dry matter accumulation in the early stage can effectively compensate the yield loss caused by weak light in the later stage.关键词
水稻/光照/氮/干物质积累/产量Key words
rice/light/nitrogen/dry matter accumulation/yield分类
农业科技引用本文复制引用
潘胜才,陈余波,简叙,卢沙沙,秦建权..光照、氮素对杂交水稻干物质积累、分配和产量形成的影响[J].作物研究,2024,38(1):1-9,15,10.基金项目
国家自然科学基金(31960376,32160502) （31960376,32160502）
贵州省粮油作物分子育种重点实验室项目(黔科合中引地[2023]008) （黔科合中引地[2023]008）
贵州省高等学校功能农业重点实验室项目(黔教技[2023]007号). （黔教技[2023]007号）
