2016-2019年氮磷添加下亚热带人工林凋落物分解剩余量及养分含量动态数据集

A dataset of litter decomposition residual mass and nutrient concentrations under nitrogen and phosphorus addition in subtropical plantations(2016–2019)

由于人类活动和自然因素改变而导致的大气氮磷沉降增加,显著影响着生态系统养分循环过程。我国南方亚热带人工林占全国人工林面积的40%以上,已成为养分沉降集中区。因此,科学认知人工林养分循环过程是应对全球气候变化、保障国家生态文明建设的基础。本研究按照中国生态系统研究网络的统一规范,通过对江西省千烟洲红壤丘陵综合开发试验站(简称千烟洲站)野外控制固定样地的长期观测,整理了2016–2019年我国亚热带马尾松和木荷人工林叶片与吸收根在氮磷添加不同处理下(对照、低氮添加、高氮添加、磷添加、高氮磷共同添加)分解剩余量及养分含量动态数据。本数据集的建立和共享,为全球变化背景下凋落物分解的动态研究及森林土壤碳库的变化规律提供基础数据支撑,推动亚热带人工林科学合理经营发展。

The increase in atmospheric nutrient deposition resulted from human activities and changes of natural factors have a dramatically influence on the ecosystem nutrient cycling.The subtropical plantations in the South of China account for more than 40%of the national plantation area,which have become the central zone of nutrient deposition.Therefore,the scientific understanding of nutrient cycling process in plantations is the basis of coping with global climate changes and ensuring the construction of national ecological civilization.According to the unified specification of Chinese Ecosystem Research Network,and on the basis of the long-term observation of the field plots of Qianyanzhou Ecological Research Station,Jiangxi(referred to as Qianyanzhou Station),we integrated residual mass and nutrient concentrations of leaf and absorptive roots of Pinus massoniana and Schima superba plantations under different treatments(control,lower nitrogen addition,higher nitrogen addition,phosphorus addition,adding both higher nitrogen and phosphorus)from 2016 to 2019.The production and sharing of this dataset can help to provide basic data support for the dynamic study of litter decomposition as well as for the stock of soil carbon pool under the background of global changes.Additionally,it can promote the sustainable development of subtropical plantations.