Burney Owen T, Redente Edward F, Lambert Charles E
John T Harrington Forestry Research Center, College of Agriculture, Consumer and Environmental Sciences, New Mexico State University, PO Box 359, Mora, NM, 87732, USA.
Redente Ecological Consultants, 2417 Brookwood Drive, Fort Collins, CO, 80525, USA.
Environ Sci Pollut Res Int. 2017 Apr;24(12):11215-11227. doi: 10.1007/s11356-017-8716-z. Epub 2017 Mar 14.
This greenhouse study examined the use of organic and inorganic soil amendments in waste rock material from the former Questa Molybdenum Mine in northern New Mexico to promote beneficial soil properties. Waste rock material was amended with 11 soil amendment treatments that included municipal composted biosolids, Biosol®, inorganic fertilizer, and two controls (pure waste rock and sand). Elymus trachycaulus and Robinia neomexicana growth performance and plant chemistry were assessed across all treatments over a period of 99 and 141 days, respectively. Even though waste rock material had more than 200 times the molybdenum concentration of native soils, adverse effects were not observed for either species. The two main limiting factors in this study were soil nutritional status and soil water retention. The biosolid amendment was found to provide the greatest buffer against these limiting factors due to significant increases in both nutrition and soil water retention. As a result, both species responded with the highest levels of biomass production and the least amount of required water demands. Use of organic amendments such as biosolids, even though short lived in the soil, may provide plants the necessary growth stimulus to become more resilient to the harsh conditions found on many mine reclamation sites.
这项温室研究考察了在新墨西哥州北部前奎斯塔钼矿的废石材料中使用有机和无机土壤改良剂，以促进有益土壤特性的形成。用11种土壤改良剂处理废石材料，其中包括城市堆肥生物固体、生物固体肥料、无机肥料以及两个对照（纯废石和沙子）。分别在99天和141天的时间里，对所有处理下的糙野麦和新墨西哥刺槐的生长性能及植物化学特性进行了评估。尽管废石材料中的钼浓度是原生土壤的200多倍，但未观察到对任何一个物种有不利影响。本研究中的两个主要限制因素是土壤营养状况和土壤保水性。由于营养和土壤保水性均显著增加，发现生物固体改良剂能为这些限制因素提供最大的缓冲。因此，两个物种的生物量产量最高，所需水量最少。使用诸如生物固体等有机改良剂，尽管在土壤中持续时间较短，但可能为植物提供必要的生长刺激，使其对许多矿山复垦场地的恶劣条件更具恢复力。
