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| Experimentally increased water and nitrogen affect root production and vertical allocation of an old-field grassland | |
Xu, Zhuwen; Ren, Haiyan; Li, Mai-He; Brunner, Ivano2; Yin, Jinfei; Liu, Heyong; Kong, Deliang3; Lu, Xiao-Tao; Sun, Tao; Cai, Jiangping; Wang, Ruzhen; Zhang, Yongyong; He, Peng; Han, Xingguo4 ; Wan, Shiqiang5; Jiang, Yong
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| 2017 | |
| 发表期刊 | PLANT AND SOIL
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| ISSN | 0032-079X |
| 卷号 | 412期号:1-2页码:369-380 |
| 摘要 | Background and aims Evidence for impacts of environmental changes on belowground net primary production (BNPP) from long-term experiments is rather scarce. We aimed to understand how long-term changes in water and nitrogen availability affect production and vertical allocation of roots in semi-arid grasslands and its consequence on carbon (C) and nitrogen (N) cycles. Methods We investigated changes of BNPP and its vertical allocation along the soil profile to 40 cm in depth in response to simultaneous increases in water and N availability over 11 years in an old-field grassland in northern China. Results Water addition increased BNPP in all soil layers (0-10 cm, 10-20 cm, and 20-40 cm), and enhanced the percentage BNPP in the upper soils but decreased that in 10-20 cm soil layer. Nitrogen addition decreased BNPP in 10-20 cm and 20-40 cm soil layers as well as total BNPP in 0-40 cm, and increased the percentage BNPP in the upper soil layer but decreased that in 10-20 cm soil layer. Water addition increased soil total C and N concentrations in 0-10 cm and 10-20 cm soil layers, while N addition only marginally decreased soil C:N ratio in 0-10 cm and 20-40 cm soil layers. Both soil total N concentration and soil C: N ratio were closely related to BNPP. Conclusions Our results highlight the importance of environmental factors, especially water availability, in determining BNPP, and in turn controlling soil nutrient accumulation in semi-arid grasslands, although the specific mechanisms remain unclear. The projected increase in precipitation in those semi-arid grasslands would enhance soil C and N sequestration. The increased allocation of BNPP in upper soils with long-term precipitation increment and N deposition may accelerate thecycles of C and N in these ecosystems, and thus increase the risk of soil C and N loss. |
| 关键词 | Belowground net primary production Carbon cycle Global change Nitrogen deposition Soil nitrogen Precipitation increase |
| 学科领域 | Agriculture ; Plant Sciences |
| DOI | 10.1007/s11104-016-3071-2 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | NET PRIMARY PRODUCTIVITY ; SOIL CARBON ; INCREASED PRECIPITATION ; TYPICAL STEPPE ; MICROBIAL RESPIRATION ; FINE ROOTS ; LIFE-SPAN ; DYNAMICS ; ECOSYSTEM ; AVAILABILITY |
| WOS记录号 | WOS:000399020200027 |
| 出版者 | SPRINGER |
| 文献子类 | Article |
| 出版地 | DORDRECHT |
| EISSN | 1573-5036 |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31370009, 41371251, 31300387] ; National Key Research and Development Program of China [2016YFC0500707] ; Swiss Federal Research Institute WSL |
| 作者邮箱 | jiangyong@iae.ac.cn |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/22138 |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China 2.Swiss Fed Res Inst WSL, Forest Dynam, CH-8903 Birmensdorf, Switzerland 3.Swiss Fed Res Inst WSL, Forest Soils & Biogeochem, CH-8903 Birmensdorf, Switzerland 4.Shenyang Agr Univ, Coll Biosci & Biotechnol, Shenyang 110866, Liaoning, Peoples R China 5.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China 6.Henan Univ, Coll Life Sci, Int Joint Lab Global Change Biol, Kaifeng 475004, Henan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Zhuwen,Ren, Haiyan,Li, Mai-He,et al. Experimentally increased water and nitrogen affect root production and vertical allocation of an old-field grassland[J]. PLANT AND SOIL,2017,412(1-2):369-380. |
| APA | Xu, Zhuwen.,Ren, Haiyan.,Li, Mai-He.,Brunner, Ivano.,Yin, Jinfei.,...&Jiang, Yong.(2017).Experimentally increased water and nitrogen affect root production and vertical allocation of an old-field grassland.PLANT AND SOIL,412(1-2),369-380. |
| MLA | Xu, Zhuwen,et al."Experimentally increased water and nitrogen affect root production and vertical allocation of an old-field grassland".PLANT AND SOIL 412.1-2(2017):369-380. |
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