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首页> 外文期刊>Plant and Soil >Experimental setup of field lysimeters for studying effects of elevated ozone and below-ground pathogen infection on a plant-soil-system of juvenile beech (Fagus sylvatica L.)
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Experimental setup of field lysimeters for studying effects of elevated ozone and below-ground pathogen infection on a plant-soil-system of juvenile beech (Fagus sylvatica L.)

机译：用于研究臭氧浓度升高和地下病原体感染对幼小山毛榉（Fagus sylvatica L.）植物-土壤系统的影响的现场溶渗仪的实验装置

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摘要

An experiment, focusing on the effects of chronically enhanced O3 regimes on young beech (Fagus sylvatica) and on the microbial rhizosphere community structure, was conducted from November 2002 to August 2006 in eight field lysimeters at the Helmholtz Zentrum München. The instrumentations of the lysimeters enabled the establishment of the water balance in the unsaturated zone and the assessment of the water uptake by plants. Further, the containment provided by the lysimeters made it possible to apply a root rot pathogen infection without contaminating the surrounding soil. A free-air fumigation system allowed to double the O3 concentration in the air above four lysimeters relative to the ambient air. To avoid damage of the leaves the maximum O3 concentration was limited to 150 nL L−1. For nearly 70% of the time the set-point concentration was reached within 10%. In the final harvest the whole soil column was retrieved and a nearly complete data-set of above-ground and below-ground parameters became available.
机译：从2002年11月至2006年8月，在Helmholtz的8个野外蒸渗仪上进行了一项实验，重点研究了长期增强的O 3 方案对幼山毛榉（Fagus sylvatica）和微生物根际圈群落结构的影响。 Zentrum慕尼黑。溶渗仪的仪器可以在非饱和区建立水平衡，并评估植物的吸水率。此外，通过测渗仪提供的封闭使得可以在不污染周围土壤的情况下施加根腐病病原体感染。自由空气熏蒸系统允许相对于周围空气，在4里米以上的空气中O 3 浓度增加一倍。为避免叶片受损，最大O 3 浓度限制为150 nL L -1 。在将近70％的时间里，设定点浓度达到10％以内。在最后的收成中，整个土壤柱都被取回，并且可以获得地上和地下参数的几乎完整的数据集。

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