论文部分内容阅读
利用沙枣、柽柳、白柠条、杨柴和八宝景天等5种植物用于铁尾矿现场小区试验,研究植物生长2a后对于铁尾矿养分及微生物的影响。结果表明:沙枣可显著促进铁尾矿中氮素积累,白柠条和八宝景天对速效氮提升效果较好。白柠条、杨柴、八宝景天3种植物根际铁尾矿中全磷含量较高;白柠条根际尾矿中速效磷含量最高。铁尾矿中有机质含量以柽柳和杨柴2种植物最高。杨柴根际铁尾矿中细菌、真菌和放线菌的数量在5种植物中均居首位,而八宝景天根际铁尾矿中3种微生物数量均最低。微生物总数由高到低依次为:杨柴>沙枣>白柠条>八宝景天>柽柳。总之,杨柴和沙枣2种植物可以提升铁尾矿养分及微生物数量上,更适于作为铁尾矿上生态重建植物。
Five species of plants such as Elaeagnus angustifolia, Tamarix spp., Caragana korshinskii, Yang Chai and Babao Sedum were used in field plot test of iron tailings to study the effects of plant growth on nutrient and microorganisms of iron tailings. The results showed that: the jujube can significantly promote the accumulation of nitrogen in iron tailings, white Caragana and Babao Sedum better available nitrogen to enhance the effect. The content of total phosphorus in rhizosphere iron tailings of the three species of white kaffir, Yangchai and Babao Sedum was higher than that in the tailings of white kaffir rhizosphere. The content of organic matter in iron tailings is the highest in the two species of Tamarix and Yangchai. The number of bacteria, fungi and actinomycetes in the iron-chaff rhizosphere of Yangchai were the highest among the five species, while the lowest in the eight species. The total number of microorganisms descending order: Yang Chai> jujube> white Caraway> Babao Sedum> Tamarix. In conclusion, two species of Yang Chai and Elaeagnus angustifolia can enhance the nutrient and microbial quantity of iron tailings, and are more suitable as ecological rebuilding plants on iron tailings.