| Super hybrid rice apparently showed high yield potential under the ecological conditions of mountainous areas. However, the yield seriously decreased because of the insufficient sunshine during the grain filling stage in plain area. This experiment was conducted with super hybrid, ordinary hybrid, and inbred varieties to observe the effect of different shading on the yield and dry matter accumulation of super hybrid rice. Different shading nets were used to filter
30% and 60% of light intensity and normal with three varieties after flowering stage. The experiment result showed that
super hybrid rice was sensitive to low light and the interaction effect was obvious between the varieties and shading
treatments compared with normal. In addition, the yield of super hybrid rice decreased by 24.2%-52.8% under the
treatment of shading. As a result, the grain filling and 1000-grain weight were susceptible to shading treatment except
panicle number and spikelet number. Besides, dry matter accumulation of super hybrid rice was significantly influenced by
shading treatment and harvest index significantly decreased after flowering. Especially, dry matter accumulation decreased
significantly after flowering, which influenced the accumulation and transforming of the dry matter. |
