论文部分内容阅读
外源有机质的输入能促进或抑制土壤有机碳的矿化,引起正的或负的激发效应。本文综述了土壤碳库激发效应产生的机制,以及土壤原有有机质的含量和营养水平,外源有机质(包括根系分泌物)的种类和数量对激发效应的影响。外源有机质的可利用率是影响激发效应的最重要因素。
Input of exogenous organic matter can promote or inhibit the mineralization of soil organic carbon, causing positive or negative excitation effect. This paper reviews the mechanism of soil carbon pool excitation and the effects of the types and quantities of exogenous organic matter (including root exudates) on the excitation effect. The availability of exogenous organic matter is the most important factor affecting the excitation effect.