保水剂和水泥含量对切挖边坡人工土壤钾素的影响

Effects of super absorbent polymers and cement content on artificial soil potassium in cut slope

了解保水剂和水泥对人工土壤钾素的影响有助于提高土壤钾素有效性,有利于边坡的植被恢复.本文以保水剂和水泥为基质原材料,选用L_(9)(3^(2))正交表进行试验,研究不同保水剂和水泥含量对土壤钾素形态的影响以及作用机制.结果表明,保水剂和水泥显著增加土壤速效钾、非交换性钾、水溶性钾、特殊吸附钾和非特殊吸附钾含量,而土壤全钾和矿物钾含量均有不同程度地减少.同时,0.30%保水剂和4%水泥能显著提高黑麦草的发芽率,但是过量的保水剂和水泥则明显降低了种子的发芽率.相关性分析表明,土壤pH与土壤有机质是影响土壤钾素有效性的重要因子.保水剂和水泥的施用可提高土壤中速效钾和非交换性钾的含量,促进土壤钾素组分之间的转化,提升土壤钾素有效性.

Understanding the effect of super absorbent polymers(SAP)and cement on artificial soil potassium is helpful to improve the availability of soil potassium,which is beneficial to vegetation restoration of the slope.In this paper,SAP and cement were used as matrix raw materials,and the L_(9)(3^(2))orthogonal table was used to conduct the effects of different SAP and cement contents on soil potassium form and mechanism of action.The results showed that SAP and cement significantly increased the contents of soil rapidly available potassium,non-exchangeable potassium,water-soluble potassium,special adsorbed potassium and non-special adsorbed potassium,while the contents of total soil potassium and mineral potassium decreased to varying degrees.At the same time,0.30%SAP and 4%cement can significantly improve the germination rate of ryegrass,but excessive SAP and cement significantly reduce the germination rate of seeds.Correlation analysis showed that soil pH and organic matter were important factors affecting soil potassium availability.The application of SAP and cement can increase the content of rapidly available potassium and non-exchangeable potassium in the soil,promote the conversion between soil potassium components and improve the availability of soil potassium.