Open AccessNitrogen deposition may enhance soil carbon storage via change of soil respiration dynamic during a spring freeze-thaw cycle period
Author(s) -
Guoyong Yan,
Yajuan Xing,
Luping Xu,
Yunlong Wang,
Wei Meng,
Qinggui Wang,
Jinghua Yu,
Zhi Zhang,
Zhidong Wang,
Siling Jiang,
Boqi Liu,
Shijie Han
Publication year - 2016
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep29134
Subject(s) - soil respiration , temperate forest , nitrogen , carbon cycle , environmental science , ecosystem , respiration , terrestrial ecosystem , nitrogen cycle , soil carbon , deposition (geology) , carbon dioxide , temperate climate , carbon respiration , temperate rainforest , forest ecology , agronomy , environmental chemistry , carbon sequestration , soil science , soil water , ecology , chemistry , botany , biology , negative carbon dioxide emission , paleontology , organic chemistry , sediment
As crucial terrestrial ecosystems, temperate forests play an important role in global soil carbon dioxide flux, and this process can be sensitive to atmospheric nitrogen deposition. It is often reported that the nitrogen addition induces a change in soil carbon dioxide emission in growing season. However, the important effects of interactions between nitrogen deposition and the freeze-thaw-cycle have never been investigated. Here we show nitrogen deposition delays spikes of soil respiration and weaken soil respiration. We found the nitrogen addition, time and nitrogen addition×time exerted the negative impact on the soil respiration of spring freeze-thaw periods due to delay of spikes and inhibition of soil respiration ( p < 0.001). The values of soil respiration were decreased by 6% (low-nitrogen), 39% (medium-nitrogen) and 36% (high-nitrogen) compared with the control. And the decrease values of soil respiration under medium- and high-nitrogen treatments during spring freeze-thaw-cycle period in temperate forest would be approximately equivalent to 1% of global annual C emissions. Therefore, we show interactions between nitrogen deposition and freeze-thaw-cycle in temperate forest ecosystems are important to predict global carbon emissions and sequestrations. We anticipate our finding to be a starting point for more sophisticated prediction of soil respirations in temperate forests ecosystems.