Laboratory analyses data set

Wildfire changes the nature and quantity of soil organic matter during the event and affects organic matter inputs after the event. Although extensive research has been conducted on the influence of wildfire on soil nutrient cycling in regards to plant nutrient limitation, less is known about the effects of wildfire on microbial nutrient limitation. In order to address this gap, soils were collected from adjacent woodland and pine forest sites that were unburnt or experienced low or high severity wildfire. These soils were incubated for 50 days, under optimal water content for soil respiration, after being amended with glucose, nitrogen solution, phosphorus solution, or a combination thereof. Amendment type only had a significant impact on cumulative respiration, microbial biomass phosphorus, and plant available nitrogen. The main result from this experiment is that microbial activity was primarily increased by C addition, then by either N or N and P addition, and that while burning increased N limitation when pooled by vegetation type from which the soil was collected, there was not a consistent response to nutrient addition due to fire severity. Therefore, although the response to nutrient addition was different for each soil, fire severity was not an important variable for microbial nutrient limitation in soils collected from these sites.

野火在事件期间改变了土壤有机质的性质和数量，并影响了事件后的有机质输入。尽管针对野火对土壤养分循环（尤其是在植物养分限制方面）的影响已经进行了广泛的研究，但对于野火对微生物养分限制的影响了解甚少。为了填补这一空白，我们从未燃烧或经历低强度或高强度野火的相邻林地和松树林地采集了土壤样本。这些土壤样本在添加葡萄糖、氮溶液、磷溶液或其组合后，在适宜土壤呼吸的水分含量下进行了50天的培养。修正类型仅对累积呼吸、微生物生物量磷和植物可用氮产生了显著影响。本实验的主要结果是，微生物活性主要通过碳的添加而增加，其次是氮或氮和磷的添加。虽然燃烧增加了从采集土壤的植被类型汇总的氮限制，但由于火势强度不同，对养分添加的反应并不一致。因此，尽管每种土壤对养分添加的反应不同，但火势强度并不是这些地点采集的土壤中微生物养分限制的重要变量。