基于不同重构土壤材料配比的草木樨生物量差异分析

为揭示不同重构土壤材料对草木樨生物量影响的差异，探寻最适宜草木樨生长的重构土壤材料配比。以内蒙古胜利矿区的表土、煤矸石、粉煤灰及岩土剥离物为原料，在温室大棚内按照不同的配比进行分层和混合盆栽试验，并采用方差分析法对盆栽试验中的草木樨地上生物量进行差异性分析。结果表明：材料间不同的组合、不同的比例都会对草木樨生物量造成影响，且差异显著；表土、煤矸石及岩土剥离物以3：3：4的比例混合时，草木樨生物量较纯表土盆栽生物量提高近30%；煤矸石含量控制在20%~30%、粉煤灰含量控制在10%以下时，重构土壤条件对草木樨生物量促进作用明显。研究表明，煤矸石、岩土剥离物、粉煤灰等可作为表土替代材料，表土替代材料的不同配比会对草木樨生物量产生不同的影响，且当表土：煤矸石：岩土剥离物=3：3：4时，重构效果最佳。

Analysis of biomass differences in Melilotus suaveolens Ledeb. based on different ratios of reconstructed soil materials

The purpose of this study is to reveal the effects of different reconstructed soil materials on the biomass of Melilotus suaveolens Ledeb., and to explore the optimum ratio of reconstructed soil materials for the growth of this species. Using topsoil, coal gangue, fly ash, and geotechnical strippings from the Shengli mining area in Inner Mongolia as raw materials, stratification and mixing pot experiments were carried out in greenhouses using different ratios, and analysis of variance was used to test the significance of the differences. Studies showed that different combinations of materials, and different proportions, significantly affected the biomass of the grass crop; when topsoil, coal refuse, and geotechnical strippings were mixed in a ratio of 3:3:4, the biomass was 30% higher than with pure topsoil. When the gangue content was controlled at 20%~30%, and the fly ash content was controlled at below 10%, the increase in biomass was evident. The use of coal refuse, waste rock and soil, fly ash, etc. as surface topping materials could solve the problem of topsoil scarcity in land reclamation work. Different ratios of topsoil substitute materials would cause differences in the biomass of hibiscus, and optimum results were obtained when the topsoil:coal gangue:geotechnical strippings ratio=3:3:4.