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首页> 外文期刊>Plant and Soil >Plant and fertiliser effects on rhizodegradation of crude oil in two soils with different nutrient status
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Plant and fertiliser effects on rhizodegradation of crude oil in two soils with different nutrient status

机译：肥料和肥料对两种营养状况不同的土壤原油根分解的影响。

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Soils and sediments polluted with crude oil are of major environmental concern on various contaminated sites. Outdoors pot experiments were conducted to test the phytodegradation potential of common reed (Phragmites australis) and poplar (Populus nigra x maximowiczii) in fertilised and non-fertilised control treatments. Two topsoils (E, G) of different texture were mixed with crude oil. Soil analysis included hydrocarbon (HC) measurements, detection of labile phosphorus and mineralised nitrogen as well as dehydrogenase activity. Increased HC degradation by native soil biota was clearly related to higher P availability in soil G and to fertilisation in soil E. Except of the non-fertilised common reed treatment, plants did not enhance crude oil degradation. We found even inhibited degradation of high molecular weight HC in the presence of plants together with declining labile phosphorous concentrations due to planting on soil E. Native soil biota were able to use the whole range of crude oil compounds (C to C) as a carbon source in the presence of sufficient nutrient concentrations in soil. This study is the first to show that reduced HC degradation in the higher molecular weight crude oil fraction (C to C) is likely to be a consequence of decreased phosphorus availability for microorganisms in the plant rhizosphere.
机译：在各种污染场所，原油污染的土壤和沉积物是主要的环境问题。进行了户外盆栽试验，以测试普通芦苇（Phragmites australis）和杨树（Populus nigra x maximowiczii）在施肥和未施肥的对照处理中的植物降解潜力。将两种质地不同的表土（E，G）与原油混合。土壤分析包括碳氢化合物（HC）测量，不稳定磷和矿化氮的检测以及脱氢酶活性。天然土壤生物区系增加的HC降解显然与土壤G中较高的P利用率以及土壤E中的施肥有关。除未施肥的普通芦苇处理外，植物并未促进原油降解。我们发现在植物存在下甚至抑制了高分子量HC的降解以及由于在土壤E上种植而导致的不稳定磷浓度下降。原生土壤生物区系能够使用整个范围的原油化合物（碳到碳）作为碳土壤中养分浓度足够时的来源。这项研究首次表明，较高分子量的原油馏分（C到C）中HC降解减少的原因很可能是植物根际微生物对磷的利用率降低的结果。

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