白浆型水稻土生物硅肥土壤肥力效应的研究

Research on the Soil Fertilizer Effect of Biological Silicon Fertilizer on Albic Rice Soil

通过田间试验研究了在白浆土上施用生物硅肥的对土壤肥力的影响。试验结果表明:生物硅肥的施入,降低了土壤中水溶性硅的含量,提高了活性硅、无定形硅和有效硅的含量,可能原因是由于硅素的施入,促进了Al(OH)3和Fe(OH)3沉淀对水溶性硅的吸附,促进了生物硅肥中活性硅的解析和溶解,促进了硅酸凝胶与土壤还原铁锰生成混合凝胶;生物硅肥的施用促进了土壤氮的矿化,降低了土壤磷的有效性,提高了土壤PH值,而对土壤有效钾的含量没有明显的影响。

Field experiment was conducted to investigate the applying effect of biology silicon fertilizer to the soil fertility on serosity soil. The tests shown that： the applying of biology silicon fertilizer, had reduced the soil＇s soluble silicon, raised the active silicon, the indefinite form of silicon and available silicon contents, maybe the reason was the silicon entered the soil, promoted the Al（OH）3 and Fe（OH）3 precipitation adsorptions to soluble silicon, boosted the biology silicon fertilizer active silicon＇s analysis and dissolve, boosted the silica acid gel and the soil deoxidation iron manganese generating the commixture gel; biology silicon fertilizer using had promoted soil nitrogen mineralization, reduced the validity of the soil phosphorus, improved soil PH value, but had not obvious effect on soil available potassium contents.