不同框架形状切挖边坡土壤大量元素有效含量的差异性--以遂渝铁路遂宁车站区域为例

Differences in Available Contents of Soil Macroelements in Cut Slopes of Different Frame:A Case of Suining Station Area in Suining-Chongqing Railway

山区道路修建、矿山开采、水电开发等工程建设形成了数量巨大的切挖边坡,而不少切挖边坡通常需要采用框架护坡才能产生良好的生态治理效果.针对菱形框架、拱形框架、无框架的切挖边坡以及自然边坡,开展土壤碱解氮含量、土壤有效磷含量、土壤速效钾含量的差异性研究.结果表明:菱形框架、拱形框架、无框架的切挖边坡与自然边坡相比,土壤碱解氮含量、土壤有效磷含量、土壤速效钾含量均显著降低.无论何种框架形状的切挖边坡还是无框架的切挖边坡,其土壤碱解氮含量均属于缺乏的范围,相互之间差异均不显著.菱形框架与拱形框架的切挖边坡之间土壤有效磷含量差异不显著,但都显著高于无框架切挖边坡土壤有效磷含量.菱形框架切挖边坡土壤速效钾含量显著高于拱形框架和无框架切挖边坡,但拱形框架切挖边坡与无框架切挖边坡之间土壤速效钾含量差异不显著.

The construction of roads,mining,hydropower development and other projects in mountainous areas have resulted in a large number of cut slopes,where frame beam is widely applied in ecological restoration and reconstruction of the cut-slopes.For the diamond frame slope(DS),arched frame slope(AS),rimless slope(RS)and the natural slope(NS),the differences of soil availa-ble N,soil available P and soil available K contents are studied.The results show that the soil available N,P,K contents of the DS,AS and RS are significantly lower than that of the NS.Regardless of the frame-shapes of the cut slopes or the RS,the soil available N contents are lower than the normal content,and the difference between them is not significant.The difference of soil available P contents between the DS and the AS is not significant,but they are significantly higher than that of the RS.The soil available K content of the DS is significantly higher than that of the AS and the RS,but there is no significant difference in the soil available K content between the AS and the RS.