凋落物处理及氮添加对杨树人工林表层土壤动物密度的影响
摘 要
大气氮沉降是全球变化重大问题之一 ,大气氮沉降对土壤和水体环境、农业和森林生态系统以及生物多样性等方面都会造成影响,人为干扰下的大气氮素沉降已成为全球氮素生物化学循环的一个重要组成部分。凋落物作为降解者的物质和能量来源，维持着森林生态系统功能稳定。土壤动物是生态系统中重要的组成部分，能灵敏感知环境变化。本文为探讨不同凋落物处理及不同浓度氮添加对土壤动物的影响，在苏北杨树人工林展开实验。
关键词：凋落物去除；凋落物倍增；氮添加；土壤动物
Effects of Different Litter Treatment and Nitrogen Addition on Animal Densityin in Surface Soil of Poplar Artificial Forest
ABSTRACT
Atmospheric nitrogen deposition is one of the major problems of global change. Atmospheric nitrogen deposition has an impact on Soil and water environment, agriculture and forest ecosystem, biodiversity and other aspects. Atmospheric nitrogen deposition under human interference has become an important part of the global nitrogen biochemical cycle. As the material and energy source of the decomposer, litter maintains the stability of forest ecosystem function. Soil animal is an important part of ecosystem, which can sense the change of environment sensitively. In order to study the effects of different litter treatments and different concentrations of nitrogen on Soil animals, experiments were carried out in Poplar Plantation in Northern Jiangsu Province.
Key words: Litter removal; double litter multiplication；nitrogen additions; soil fauna
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