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江汉平原石灰性水稻土有效硅含量受粘粒含量的影响最大，土壤ｐＨ和全锰含量均通过粘粒对有效硅含量起作用，且锰的影响大于ｐＨ，硫对有效硅具显著负效应。该类水稻土有效硅含量均大于临界缺硅水平，其含量与稻草和稻谷中硅含量呈极显著正相关，但对水稻产量没有显著影响。植株分析反映，土壤有效硅对稻株吸收磷、钙、锌、锰等元素有显著抑制，不过未因此影响水稻产量。研究认为，在目前产量水平下，有效硅不是该类土壤影响水稻产量提高的主要限制因素。
The effective silicon content of calcareous paddy soil in Jianghan Plain was the most affected by the clay content. Soil pH and total manganese content all contributed to the effective silicon content through clay, and the effect of manganese was greater than pH. Sulfur had a significant negative effect on available siliceous soil. The effective silicon contents of these paddy soils were all greater than the critical silicon deficiency. The contents of silicon were significantly and positively correlated with the contents of silicon in straw and rice, but had no significant effect on rice yield. Plant analysis showed that soil available silicon significantly inhibited the absorption of phosphorus, calcium, zinc and manganese in rice plants, but did not affect the yield of rice. According to the research, available silicon is not the main limiting factor for this kind of soil to affect the increase of rice yield at the current production level.