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试验结果表明，上海地区大多数灌溉水中二氧化硅含量低于１０ ｍ ｇ／ｋｇ，土壤有效硅含量为２００～４００ ｍ ｇ／ｋｇ，水稻生长发育过程中吸收的硅主要来自土壤，水稻植株的含硅量和土壤有效硅含量呈极显著正相关。齐穗期测得水稻植株的硅含量在４．０％ ～６．３％ 的范围内，硅／氮值为２．６～４．８，硅／钾值为 ２．５～４．１，水稻的硅营养处于相对不充足的状态。在施用可溶性硅１５．２ｋｇ／６６６．７ｍ ２的条件下，水稻对硅和磷的吸收明显增加，而对钾的吸收有所减少。施用硅肥可使水稻的有效穗数和每穗实粒数得到增加，而对粒重没有明显的影响，稻谷产量平均增加５％ 左右，但多数试验点的增产幅度没有达到统计学的显著水平。
The results show that most of the irrigation water in Shanghai has a silica content of less than 10 m g / kg and an available soil silicon content of 200-400 m g / kg. The silicon absorbed during the growth and development of rice mainly comes from soil and rice plants There was a significant and significant positive correlation between silicon content and soil available silicon content. The content of silicon in rice was 4.0% ~ 6.3% at heading stage, the silicon / nitrogen value was 2.6-4.8, the silicon / potassium value was 2.5-4.1, Silicon nutrition in rice is in a relatively inadequate state. Under the condition of applying 15.2kg / 666.7m 2 of soluble silicon, the absorption of silicon and phosphorus in rice increased obviously, but the absorption of potassium decreased. Application of silicon fertilizer can increase the effective panicle number per panicle and grain number per panicle, but have no obvious effect on the grain weight. The yield of paddy increased by 5% on average, but the yield increase of most of the experimental sites did not reach the significant level .