本研究以露天煤矿排土场新土体上建植的不同人工草地为对象，分析了不同人工草地地上生物量、土壤水分及土壤入渗性能。结果表明，不同人工草地地上生物量之间差异显著（P ＜0．05），灌木和草灌混播草地的地上生物量比单一草种草地高，冰草＋沙蒿和沙打旺＋沙蒿草地地上生物量分别比单一种植冰草和沙打旺的草地高40．84％～47．88％和27．31％～53．49％；不同人工草地土壤含水量随深度增加而增大，20～30 cm 层土壤含水量花棒草地最高；不同人工草地地上生物量和土壤水分的累加值呈负相关关系；草灌混播草地的平均土壤初始入渗速率比单一草种草地高44．25％。本研究结果表明，在矿区排土场新土体改良和植被恢复建设中应以草灌混播人工草地为主，可有效提高草地生产力，改善土壤的水分状况和入渗性能，利于植被生长的可持续。
Soil moisture and infiltration characteristics for artificial pasture planted on opencast coal mining tailings
This study analyzed the above-ground biomass,soil moisture and infiltration rates for different artifi-cial pastures planted on opencast coal mine tailings.The above-ground biomass of different artificial grasslands was significantly different (P <0.05),with the above-ground biomass of shrub-grassland and mixed planting of shrub and grass being greater than that of single-plant pasture.The above-ground biomasses of Agropyron mongolicum +Artemisia desertorum pasture and Astragalus adsurgens +A.desertorum pasture were higher than those of A.mongolicum and A.adsurgens pasture by 40.84%-47.88% and 27.31%-53.49%,respec-tively.Soil water content of artificial pasture increased with increased soil depth and was highest for the 20-30 cm soil layer in Hedysarum scoparium pasture.The above-ground biomass of different artificial grassland types negatively correlated with the accumulated mean value of soil moisture.The mean initial infiltration of mixed plantings of shrub and grass were higher than those of single plant pasture by 44.25%.These results in-dicate that mixed planting of shrub and grass is the best choice for soil development and vegetation restorationof opencast coal mine tailings.
国家科技期刊平台
NSTL
万方数据
维普
