This study investigated the capacity of Lupinus polyphyllus (Leguminosae) and Rumex acetosella (Polygonaceae) to promote nutrient accumulation and microbial activity on tephra from the volcanic eruption of the Chilean Puyehue–Cordon Caulle complex (Northern Patagonia) in June 2011. In December 2015, February 2016 and September 2016, we sampled (1) barren substrate (‘Barren’), (2) substrate under R. acetosella (‘R. ac. substrate’), (3) substrate under L. polyphyllus (‘L. po. substrate’), (4) R. acetosella rhizosphere substrate (‘R. ac. rhizosphere’) and (5) L. polyphyllus rhizosphere substrate (‘L. po. rhizosphere’) (n = 5). Soil properties (moisture, pH, electrical conductivity, organic C, available P, inorganic N and total N) and microbial activity (enzymatic activities) were assessed. ‘Barren’ presented the lowest moisture, organic C, total N and enzymatic activities. ‘R. ac. substrate’ and ‘L. po. substrate’ showed similar levels of organic C (0.23–0.30 g kg⁻¹), and however, R. acetosella was associated with lower inorganic N (‘R. ac. substrate’ = 0.7 and ‘L. po. substrate’ = 2.3 mg kg⁻¹) while L. polyphyllus tended to promote higher total N, especially in the rhizosphere (‘R. ac. rhizosphere’ = 0.19 and ‘L. po. rhizosphere’ = 0.34 g kg⁻¹). ‘L. po. substrate’ and ‘L. po. rhizosphere’ presented the highest enzymatic activities. After five years, L. polyphyllus and R. acetosella have increased tephra organic C, total N and microbial activity, and however, L. polyphyllus has maintained the best substrate N availability.

中文翻译：

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羽扇豆Lindl。和Rumex acetosella L.对Puyehue–Cordón Caulle喷发的养分积累和特发菌微生物活性的影响（2011年）

这项研究调查了羽扇豆（Leguminosae）和鼠尾草（Rumex acetosella）（虎杖科）在2011年6月智利Puyehue-Cordon Caulle复合体（北巴塔哥尼亚）的火山喷发中促进提尔夫拉的养分积累和微生物活性的能力。2015年12月， 2016年2月和2016年9月，我们采样了（1）贫瘠基质（'Barren'），（2）醋杆菌（R. acetosella）下的基质（'R. ac。substrate'），（3）多叶李子藻（'L. po。底物”），（4）醋酸根瘤菌根际底物（'R. ac。根际圈'）和（5）多叶L. polyphyllus根际底物（'L. po。根际圈'）（n = 5）。评估了土壤性质（水分，pH，电导率，有机碳，有效磷，无机氮和总氮）和微生物活性（酶活性）。“贫瘠”的水分，有机碳，总氮和酶活性最低。'R。交流 基材”和“ L. po。基板”表明有机碳的类似水平（0.23-0.30克千克^-1），并然而，R. acetosella与较低的无机N（相关联的‘R.交流。基底’= 0.7，‘L. PO。基底’= 2.3 mg kg ^-1），而多叶木麻黄倾向于促进较高的总氮，尤其是在根际（'R. ac。根际'= 0.19和'L. po。根际'= 0.34 g kg ^-1）。'L。po。基材”和“ L. po。根际'呈现最高的酶活性。五年后，多叶L.和acetosaella提高了特弗拉有机碳，总氮和微生物活性，但是，多叶L.保持了最佳的底物N利用率。