Landscape variation in nitrogen mineralization and nitrification
Landscape variation in nitrogen mineralization and nitrification
复制标题
氮矿化和硝化的景观变化
DOI：
10.1139/x86-223
复制
发表时间：
1986
影响因子：
2.2
通讯作者：
G. Host
中科院分区：
文献类型：
--
作者：
D. Zak;K. Pregitzer;G. Host
研究了三个旱地森林生态系统潜在的氮矿化和硝化作用，以了解景观基础上的氮素周转情况。所研究的密歇根北部森林是一个主要与冰川喷涌特征有关的橡树生态系统和两个糖枫生态系统，这两个生态系统出现在冰川地貌上，但地面植物物种的多样性和丰度不同。在三个生态系统中，随机选择了四个相距至少6 公里的林分进行采样。潜在的净氮矿化和硝化作用是通过实验室好氧培养来确定的。秋季从所有生态系统收集凋落物。在橡树和糖枫生态系统之间，凋落物产量、氮素返还到森林地面，以及净矿化量相差两倍。物种丰富的糖枫生态系统的潜在硝化能力是物种丰富的糖枫生态系统的4倍。硝化实际上是一种..。
Potential nitrogen mineralization and nitrification were studied in three upland forest ecosystems to develop an understanding of nitrogen turnover on a landscape basis. The northern Michigan forests studied were an oak ecosystem primarily associated with glacial outwash features and two sugar maple ecosystems that occurred on morainal landforms but differed in the diversity and abundance of ground flora species. Four randomly chosen stands separated by at least 6 km were sampled within each of the three ecosystems. Potential net nitrogen mineralization and nitrification were determined by an aerobic laboratory incubation. Litter was collected from all ecosystems during autumn. Litter production, nitrogen returned to the forest floor, and net mineralization differed by a factor of two between the oak and sugar maple ecosystems. The species-rich sugar maple ecosystems exhibited a fourfold increase in potential nitrification compared with the species-poor sugar maple ecosystem. Nitrification was virtually a...