温室土壤硅素肥力的初步研究

Study on the Fertility of Silicon in Greenhouse Soils

以蔬菜温室土壤为试材，通过测定相关的土壤主要化学性质与等温吸附试验，研究了温室土壤硅素肥力状况及其影响因素。结果表明：温室0-20cm土层土壤水溶态硅、活性硅、有效硅的含量明显高于20-40cm土层，0～20cm土壤有效硅含量受土壤pH值和有机质的显著影响；在低浓度条件下，直线方程y=bx-a可以很好地描述0～20cm土层土壤平衡液浓度与土壤吸附硅数量间的关系，其参数a、b与土壤有效硅、pH值和有机质之间存在着显著或极显著的直线正相关关系，它们能够在一定程度上反映温室土壤的供硅能力。

Abstraet：Silicon fertilizer could promote the growth of horticultural crop. The quality of fruits and plant resistance to stress would be enhanced. However, reports about the silicon fertility and the influences, of greenhouse soils are few. The state and influence factor of silicon in greenhouse soils was studied by isothermal adsorption experiment and chemical analysis. The results showed that the Conmnt of soluble silicon, active silicon, and available silicon in 0~20 cm depth soils was obviously more than that Of 20~40 cm,the content of available silicon was affected by soil pH and organic mat- ter significantly in 0~20 cm soil layer. Under low silicon concentration conditions, the linear equation, y=bx-a,, was found to be suitable in describing the relationship between silicon adsorption and equilibrium concentration of the soils in 0-20 cm. The parameters of a, b had a significant and positive linear correlation with the available silicon, soil pH, and organic matter,which to some extents,suggested the silicon supplying capacity in the greenhouse soils.