【摘要】 以盆钵和大田栽培相结合， 研究了抽穗灌浆期模拟阴天条件下和模拟阴天处理结束后恢复期的群体光质环境变化及其对产量形成的影响。结果表明， 阴天使水稻群体的入射和吸收光谱中的光合有效辐射及蓝光（４００～５１０ ｎｍ ） 和红光（６１０～７２０ ｎｍ ） 辐射能大幅度减少，且各自在总辐射中所占的比例均显著小于晴天， 以蓝光减少较多；在恢复生长期，也有类似趋势，其中红光占总辐射的比例减少幅度更大，从而使水稻群体干物质生产下降，分配失调，结实率降低，导致水稻减产。１９９５ 和１９９６ 年的减产率分别为３６５％ 和３５９％ ，１９９７年各时段处理的减产范围在９７％ ～３１０％ 之间更多还原

【Abstract】 The variety of light quality environment in rice population and it’s influence on yield formation, under simulated cloudy condition and resumption stage after completing treatment, were studied in this paper during rice heading filling period by planting the rice either in pots or in field.The radiant energy of photosynthesis effective radiation, blue light (400～510 nm) and red light (610～720 nm) in rice population were remarkably reduced under simulated cloudy days,and their respective proportion to total radiant energy was significantly less than that in fine days with a greater reduce in the blue light.The similar tendency occurred at resumption stage with a greater drop in the red light.These leaded to the decline of dry matter accumulationgave,gave rise to the disorder of dry matter distribution,and resulted in the yield drop The yield in 1995 and 1996 reduced by 36 5% and 35 9%, respectively The yield dropped from 9 7% to 31 0% in every stage of treatment in 1997更多还原