生态学报2018，Vol.38Issue(3)：1106-1113,8.DOI:10.5846/stxb201611072256
模拟增温对中亚热带杉木人工林土壤磷有效性的影响
Effects of simulated warming on soil phosphorus availability in subtropical Chinese fir plantation
摘要
Abstract
Phosphorus (P),one of the most important nutrients in soil,is essential for plant growth,and plays a significant role in maintaining the balance of forest ecosystems.Furthermore,soil P availability is controlled mainly by geochemical and biological processes and can be vulnerable to global climate change.Warming,which has become one of the most important topics of current study,directly and indirectly alters soil P cycling in terrestrial ecosystems;however,to date,most studies have focused on nitrogen deficiency in temperate ecosystems,and have produced inconsistent results regarding the responses of soil P dynamics.Few relevant studies have been conducted in P-deficient tropical and subtropical forest ecosystems.In order to study the potential impacts of warming on soil P fractions related to P availability,we simulated warming in a subtropical Chinese fir plantation,and undertook sampling after one and a half years of short-term warming.The result showed that soil acid phosphatase in the warming treatment was 1.5 times higher compared to that in the control treatment,and that soil available P had increased by 25％,whereas soil total P,microbial P,and organic P had declined by 6％,34％,and 12％,respectively.The increased soil P availability after short-term soil warming is mainly attributed to an increase in acid phosphatase activity that can promote mineralization of soil organic P,and to the reduced P immobilization of microbe.Despite the increase in soil available P after short-term warming,the significant decrease in microbial P,which is potentially available for plants,is likely to exacerbate P limitation in subtropical Chinese fir plantations.The findings of this study indicate that more attention should be paid to the responses of soil P to climate warming in the subtropical zone and highlight the need for further research.关键词
磷有效性/增温/杉木人工林/亚热带/森林土壤Key words
phosphorus availability/warming/Chinese fir plantation/subtropical zone/forest soil引用本文复制引用
贝昭贤,张秋芳,郑蔚,杨柳明,陈岳民,杨玉盛..模拟增温对中亚热带杉木人工林土壤磷有效性的影响[J].生态学报,2018,38(3):1106-1113,8.基金项目
“973”计划(2014CB954003) （2014CB954003）
国家自然科学基金青年基金项目(31300523) （31300523）
