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首页> 外文期刊>International Journal of Phytoremediation >EFFECTS OF DIFFERENT SOIL AMELIORANTS ON KAREE TREES (SEARSIA LANCEA) GROWING ON MINE TAILINGS DUMP SOIL-PART I: POT TRIALS
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EFFECTS OF DIFFERENT SOIL AMELIORANTS ON KAREE TREES (SEARSIA LANCEA) GROWING ON MINE TAILINGS DUMP SOIL-PART I: POT TRIALS

机译：不同土质改良剂对矿山尾矿库克力树（Searsia Lancea）生长的影响-土壤部分I：盆栽试验

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Rehabilitation of mine tailings dams is often a challenge due to a lack of nutrients and a poor humus reservoir prevailing in tailings soils. This is especially true for establishing longer lived species such as trees. For these reasons the effects of different soil ameliorants (woodchips compost, vermicompost, mature sewage sludge), added to the root system of Karee (Searcia lancea) saplings were tested in pot trials. Those pots were filled with platinum and gold tailings substrate as well as red clay soil, respectively. For three months plants remained in a greenhouse and were subsequently moved to a test field outside. Throughout the test period regular chl a fluorescence measurements were taken and subjected to JIP-test quantifying changes in photosynthetic vitality status. Additionally, growth measurements and one-off leaf analysis were carried out. Test plants growing on mine tailings experienced an up to 35% higher average photosynthetic vitality (PIABS) and improved nutrient supply, when treated with mature sewage sludge. Consequently, sewage sludge treated plants showed a higher biomass build-up rate and an up to 55% higher diameter growth, compared to control. In summary the experiments present a low cost alternative for reforestation enterprises on platinum and gold tailings dams in South Africa.
机译：尾矿坝的修复通常是一个挑战，因为缺乏养分，尾矿土中普遍存在腐殖质储层不足。对于建立寿命更长的物种（例如树木）尤其如此。由于这些原因，在盆栽试验中测试了添加到Karee（Searcia lancea）幼树的根系中的不同土壤改良剂（木屑堆肥，ver堆肥，成熟的污水污泥）的影响。这些罐子分别装满了铂金和金尾矿基质以及红粘土。在温室中放置了三个月的植物，然后将其转移到室外的试验田。在整个测试期间，定期进行chl荧光测量，并进行JIP测试以量化光合作用活力状态的变化。另外，进行了生长测量和一次性叶片分析。用成熟的污水污泥处理后，在矿山尾矿上生长的测试植物的平均光合作用活力（PIABS）最高提高35％，营养物质供应提高。因此，与对照相比，污水污泥处理过的植物显示出更高的生物量积累速率，并且直径增长高达55％。总之，这些实验为南非的铂金和金尾矿坝造林企业提供了一种低成本的替代方案。

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