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在３５％和７０％两种不同土壤相对含水量情况下，施用硅肥能减少小麦光合“午休”时的谷值，使“午休”现象不明显，而施用钾肥的冬小麦光合速率高，光合“午休”时间短。硅钾肥配施则具有二者的优点。土壤含水量为７０％的处理光合速率与气孔导度呈正相关，而含水量为３５％的处理由于水分胁迫，影响光合速率的因素除气孔外，界面及叶肉阻力也是一个重要因素。
Under the relative water content of 35% and 70%, the application of silicon fertilizer could reduce the valley value of photosynthesis at “lunch break” and make the phenomenon of “lunch break” not obvious. However, the photosynthesis rate of winter wheat with potassium fertilizer was higher, Lunch break "a short time. Silicon potash fertilizer facilities have the advantages of both. The correlation between photosynthetic rate and stomatal conductance was positively correlated with the soil water content of 70%. However, the water content of 35% was also an important factor in the process of photosynthesis due to water stress and photosynthetic rate.