生态学报2018，Vol.38Issue(8)：2829-2837,9.DOI:10.5846/stxb201705160910
短期增温对中亚热带杉木人工幼林土壤氮磷耦合作用的影响
Influence of short-term warming on the coupling mechanism between soil nitrogen and phosphorus in a young Cunninghamia lanceolata stand in mid-subtropical China
摘要
Abstract
Global warming has caused a series of ecological issues in terrestrial ecosystems and the biosphere as a whole;these issues will further aggravate because global average temperatures will continue to increase.Currently,the effects of warming,nitrogen deposition,and forest regeneration on soil nutrients such as N and P have been studied;however,the effects of warming on the coupling between soil N and P in subtropical forests remain unknown.In this study,the influence of short-term warming on the coupling mechanism between soil N and P in Chinese fir (Cunninghamia lanceolata) seedlings in a mid-subtropical plantation was investigated.In the experiment,cables were buried in the soil to increase soil temperature (temperature range (5±0.5)℃).The effects of short-term warming on soil water content,microbial biomass N (MBN),microbial biomass P (MBP),soil N and P,and N and P coupling were studied.The results showed that the effects of short-term warming on total N and total P were not significant.In the first year,temperature increase led to significant increase in effective N,ammonium N,and available P content,and a significant reduction in MBN content.In the second year,with the increase of temperature,the contents of available P,NH4+,and MBP decreased significantly.However,the increase in NH4+/(NO3-+NO2-) content significantly reduced the MBN/MBP content,and alleviated the limitation of P on microorganisms,but the effects of temperature on total N/P and available N/P were not significant.Correlation analysis showed that the coupling effect was not only influenced by the interaction between N and P,but was also influenced by soil temperature,soil water content,and other factors.These results indicated that short-term warming did not significantly affect soil N-P coupling in the subtropical Chinese fir plantation;however,it increased available N and available P contents by promoting plant growth.Thus,our findings will provide an important theoretical basis for sustainable development and scientific management of subtropical forest ecosystems in the context of future global warming.关键词
增温/土壤氮/土壤磷/耦合作用/中亚热带Key words
warming/soil nitrogen/soil phosphorus/coupling mechanism/mid-subtropical引用本文复制引用
赵盼盼,杨舟然,陈岳民,杨玉盛,高金涛,郑蔚,贝昭贤,刘志江,熊德成,叶旺敏,曾晓敏,袁萍..短期增温对中亚热带杉木人工幼林土壤氮磷耦合作用的影响[J].生态学报,2018,38(8):2829-2837,9.基金项目
国家自然科学基金项目(31670620) （31670620）
海峡联合基金项目(U1505233) （U1505233）
“973”计划项目(2014CB954003) （2014CB954003）
