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选取碱性水田土壤,采用盆栽试验的方法,研究了施用硅肥后水稻生育期土壤溶液pH、Eh、硅浓度及对水稻产量的影响。结果表明,各处理pH经历了一个迅速降低,趋于中性的过程。单施硅肥对pH影响不大;施用葡萄糖或葡萄糖与高炉渣配施可明显降低水稻生育前期土壤溶液pH。各处理Eh的变化基本呈现为近似“W”形。淹水初期,施肥各处理土壤Eh均低于对照;后期施硅处理的Eh高于对照,而单施葡萄糖和高炉渣与葡萄糖配施处理Eh低于对照。各处理土壤溶液硅的浓度都经历了一个先上升达到高峰,然后逐渐下降,最终趋于稳定的过程。与对照相比,施用硅肥可不同程度地提高水稻生育期土壤溶液硅的浓度和不同生育期水稻植株含硅量;施用葡萄糖可提高水稻营养生长期土壤溶液中硅的浓度,但对提高水稻植株硅含量的作用不大;施用硅肥可以显著提高水稻产量,施用葡萄糖没有增产作用。
The alkaline paddy soils were selected to study the effect of silicon fertilization on the pH, Eh, silicon concentration and the effect on the yield of rice during the growth period of rice. The results showed that each treatment pH experienced a rapid decrease, tends to neutral process. The application of silicon fertilizer has little effect on pH; application of glucose or glucose together with blast furnace slag can obviously reduce the pH of soil solution before rice growth. The changes of each treatment Eh basically showed an approximate “W” shape. In the early flooding period, soil Eh of fertilization was lower than that of the control. Eh of the later silicon application was higher than that of the control. However, Eh was lower than that of the control when glucose alone and blast furnace slag were mixed with glucose. The concentration of silicon in all soil solutions experienced a first rise to peak, and then gradually decline, and eventually tends to be stable. Compared with the control, the application of silicon fertilizer could increase the silicon concentration of soil solution and the silicon content of rice plants at different growth stages to different extents. The application of glucose could increase the concentration of silicon in soil solution during vegetative growth period, Plant silicon content of little effect; application of silicon fertilizer can significantly increase the yield of rice, the application of glucose did not increase production.