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对晚稻品种包选2号、团结一号、早中山一号和早稻品种广选3号等进行遮光试验,结果表明:感光性的强弱依次为包选2号>团结一号>早中山一号>广选3号。即典型晚稻迟熟种>晚稻中熟种>晚稻早熟种>早稻迟熟种。给予各品种每天9小时光照,处理8天、16天、24天后,各处理均能在早造季节正常抽穗成熟;随遮光天数增加,生育期逐渐缩短,但缩短幅度越来越小。遮光处理后株高变矮,叶片数、穗粒数减少,穗长缩短,结实率提高,产量降低。晚稻品种在早造短日处理抽穗成熟后留桩再生具有一定的生产潜力,就地翻春年繁两造具有一定经济价值。
The results showed that the sensitivities of photosynthesis were as follows: package selection No.2> No.8> Za Nanshan No.1 No.> Canton election on the 3rd. That is, the late late rice in late rice> the late rice in middle season> the late rice in early maturity> the late rice in late maturity. All treatments were given 9 hours of light per day. After 8 days, 16 days and 24 days of treatment, all the treatments could be normalized and matured in the early season. With the increase of the number of shading days, the growth period was shortened, but the reduction rate was smaller and smaller. After shading treatment, the plant height became shorter, the number of leaves and grains per spike reduced, the spike length shortened, the seed setting rate increased and the yield decreased. Late rice varieties in the early short days processing heading mature pile retention has a certain potential for production, turning the spring two years in situ have some economic value.