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本文通过实地考察和实验测量的方式,对影响森林生物固氮潜力的机理进行研究,研究结果可为理解森林生物固氮潜能对模拟大气氮沉降和人工磷添加及其交互作用的响应提供帮助,同时可为我国南方森林(尤其人工林)可持续经营管理提供一定的理论依据。1研究背景与目的生物固氮是森林生态系统重要的氮素来源。近几十年来,全球环境变化使得大气氮沉降明显增加,这对森林环境产生一系列负面影响,比如引起土壤酸化、生物多样性减少、生产力降低等。氮素输入将使森
In this paper, the mechanism of nitrogen fixation potential in forest biological was studied through field investigation and experimental measurement. The results may help to understand the response of forest biological nitrogen fixation potential to simulated atmospheric nitrogen deposition and artificial phosphorus addition and their interactions. Provide a certain theoretical basis for the sustainable management of forests in South China (especially plantations). 1 Research Background and Purpose Biological nitrogen fixation is an important source of nitrogen in forest ecosystems. In recent decades, global environmental changes have led to a significant increase in atmospheric nitrogen deposition, which has a series of negative impacts on the forest environment, such as soil acidification, decreased biodiversity, and reduced productivity. Nitrogen input will make Mori