水稻是典型的硅酸植物,其生长发育需要大量的硅(茎叶中含量可达到干重的10％～20％)。硅由根吸收后因蒸腾作用与水一起在体内上升,水由叶片蒸腾,大部分硅累积在表皮细胞表面,对水稻有重要的生理效应。1 硅对水稻的生理效应1.1 增强水稻的抗逆性 由于水稻基叶表皮细胞外面沉积一层坚硬的 Rice is a typical silicic acid plant, its growth and development require a large amount of silicon (stems and leaves can reach 10% to 20% of dry weight). Silicon is absorbed by the roots and rises with the water in the body due to the transpiration. The water is transited by the leaves and most of the silicon accumulates on the epidermal cell surface, which has an important physiological effect on rice. 1, the physiological effects of silicon on rice 1.1 enhance the resistance of rice paddy leaf epidermal cells outside the deposition of a hard layer