Effects of Nitrogen Fertilization on Litter and Soil Decomposition: Soil CN

The influence of inorganic nitrogen (N) inputs on decomposition is poorly understood. Some prior studies suggest that N may reduce the decomposition of substrates with high concentrations of lignin via inhibitory effects on the activity of lignin-degrading enzymes, although such inhibition has not always been demonstrated. The purpose of E145 was to study the effects of nitrogen (N) addition on decomposition of seven substrates ranging in initial lignin concentrations (from 7.4 - 25.6%) over five years in eight different grassland and forest sites in central Minnesota.

无机氮（N）输入对分解过程的影响尚未得到充分理解。一些先前的研究表明，氮可能通过抑制木质素降解酶的活性来降低高木质素浓度底物的分解速率——尽管此类抑制作用并非总能得到证实。E145数据集的目的是在明尼苏达州中部的8个不同草地和森林站点，研究为期五年的氮（N）添加对7种初始木质素浓度范围（7.4%-25.6%）底物分解的影响。