Influences of nitrogen deposition on decomposition of soil organic matter in forest

研究了氮沉降对森林土壤有机质含量的影响，重点是土壤有机质分解的酶。这表明，氮输入降低多酚氧化酶的活性，这有利于土壤有机质的降解，在森林的Andisol。这种下降可能是由于增加的磷限制多酚氧化酶生产微生物具有较差的竞争能力，在具有高容量的磷吸附的Andisol。

The effects of nitrogen depositions on organic matter contents in forest soils, the large reservoir of carbon, was examined, focusing on enzymes involved in decomposition of soil organic matter. It is suggested that the nitrogen input lowers the polyphenol oxidase activity, which facilitates the degradation of soil organic matter, in a forested Andisol. This decline may be due to the increased phosphorus limitation for polyphenol oxidase-producing microorganisms with an inferior competitive ability in Andisols having high capacity for phosphorus sorption.