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本文采集江苏水稻土47个主要土种400余样点耕层土样进行分析.数据表明,土壤有效硅(SiO_2)含量≤100mgkg~(-1)的水稻土面积近1000万亩,100～130mgkg~(-1)的面积约700万亩,据多点施用硅肥试验结果,土壤有效硅≤100mgkg~(-1)可增产稻米10%左右; ≤130mgkg~(-1)者增产5%以上.
In this paper, more than 400 soil samples from 47 main soils of paddy soil in Jiangsu Province were collected for analysis.The data show that the paddy soil area with effective soil silicon (SiO 2) ≤100mgkg -1 is nearly 10 million mu and 100 ~ 130mgkg ~ (-1) area of about 700 mu, according to the results of multi-point application of silicon fertilizer, soil available silicon ≤ 100mgkg -1 can increase about 10% of rice; ≤ 130mgkg -1 increase of more than 5% .