采用碱溶酸析技术将稻壳灰中非晶态分子硅转化为易溶态硅酸盐,通过水稻萌发试验,研究不同浓度硅预处理对种子活力、根系吸收能力及幼嫩叶片叶绿素含量的影响.结果表明,稻壳灰提取硅与常规硅肥对种子萌发影响表现趋势一致.一定硅浓度范围内,种子发芽势、发芽率、发芽指数随硅浓度增加而增加,达一定值后,随硅浓度增加而降低；根系活跃吸收面积与总吸收面积以处理B硅含量8％,稀释300倍最高,其次是稀释400倍,以处理D硅含量16％,稀释100倍最低；常规硅肥处理对水稻叶绿素影响略低于与同一硅浓度稻壳灰提取硅处理,但差异不明显.稻壳灰提取硅含量在8％,稀释300 ～400倍浸种,具有明显的促进种子萌发作用.%Extracted silicon from rice hull ash by the initial carbon treatment, then high content, purity and effective silicon were required through the methods of alkali solution and acid out. We compared different concentration Si impacted on rice seed germination. Analysis of sequences showed that within certain Si,total absorption area of rice roots (TAAR)and active absorption area of rice roots ( AAAR) were increased with the decreasing of silicon concentration, and were appeared as silicon with decreasing concentration trend when silicon content was reduced to some extent; Total chlorophyll content were showed similar trends under low content of silicon, more lower silicon content,more beneficial to the accumulation of chlorophyll. Contrasted with the treatment of silicon liquid fertilizer has not clearly different on the rice chlorophyll and root vigor. We concluded that extracted silicon from rice husk ash was reached to 8 percent and dilution was from 300 to 400 times were both promoted the seed vigor,it was effective to seed germination.
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