exogenous organic matter

The availability of added exogenous organic matter is the most important factor to priming effect .

外源有机质的可利用率是影响激发效应的最重要因素。

The topsoil was greater than the soil layers , the input of exogenous organic matter is conducive to the increase of the soil inert organic carbon content .

其中表层土壤大于表下层土壤，外源有机物质的输入有利于土壤惰性有机碳含量的增加。

The mineralization of soil organic matter can be accelerated or retarded by the addition of exogenous organic matter to soil , thus causing positive or negative priming effect .

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。