Effect of elevated atmospheric co2 concentration on soil and root respiration in winter wheat by using a respiration partitioning chamber
文献类型：期刊论文
| 作者 | Kou, Taiji; Zhu, Jianguo; Xie, Zubin; Hasegawa, Toshihiro; Heiduk, Katia |
| 刊名 | Plant and soil
 |
| 出版日期 | 2007-10-01 |
| 卷号 | 299期号:1-2页码:237-249 |
| 关键词 | Soil respiration Soil co2 emission Root respiration Elevated atmospheric pco(2) Free-air co2 enrichment Winter wheat |
| ISSN号 | 0032-079X |
| DOI | 10.1007/s11104-007-9380-8 |
| 通讯作者 | Zhu, jianguo(jgzhu@issas.ac.cn) |
| 英文摘要 | Soil respiration in a cropland is the sum of heterotrophic (mainly microorganisms) and autotrophic (root) respiration. the contribution of both these types to soil respiration needs to be understood to evaluate the effects of environmental change on soil carbon cycling and sequestration. in this paper, the effects of free-air co2 enrichment (face) on hetero- and autotrophic respiration in a wheat field were differentiated and evaluated by a novel split-root growth and gas collection system. elevated atmospheric pco(2) of approximately 200 mu mol mol(-1) above the ambient pco(2) significantly increased soil respiration by 15.1 and 14.8% at high nitrogen (hn) and low nitrogen (ln) application rates, respectively. the effect of elevated atmospheric pco(2) on root respiration was not consistent across the wheat growth stages. elevated pco(2) significantly increased and decreased root respiration at the booting-heading stage (middle stage) and the late-filling stage (late stage), respectively, in hn and ln treatments; however, no significant effect was found at the jointing stage (early stage). thus, the effect of increased pco(2) on cumulative root respiration for the entire wheat growing season was not significant. cumulative root respiration accounted for approximately 25-30% of cumulative soil respiration in the entire wheat growing season. consequently, cumulative microbial respiration (soil respiration minus root respiration) increased by 22.5 and 21.1% due to elevated pco(2) in hn and ln, respectively. high nitrogen application significantly increased root respiration at the late stage under both elevated pco(2) and ambient pco(2); however, no significant effects were found on cumulative soil respiration, root respiration, and microbial respiration. these findings suggest that heterotrophic respiration, which is influenced by increased substrate supplies from the plant to the soil, is the key process to determine c emission from agro-ecosystems with regard to future scenarios of enriched pco(2). |
| WOS关键词 | CARBON-DIOXIDE ENRICHMENT ; NITROGEN-FERTILIZATION ; LOLIUM-PERENNE ; LONG-TERM ; MICROBIAL CONTRIBUTIONS ; GROWTH-RESPONSE ; ORGANIC-MATTER ; CLIMATE-CHANGE ; DOUGLAS-FIR ; SUGAR MAPLE |
| WOS研究方向 | Agriculture ; Plant Sciences |
| WOS类目 | Agronomy ; Plant Sciences ; Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000249920700018 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2380431 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhu, Jianguo |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State Key Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Natl Inst Agroenvironm Sci, Tsukuba 3058604, Japan 4.Fed Agr Res Ctr, Inst Agroecol, D-38116 Braunschweig, Germany |
| 推荐引用方式 GB/T 7714 | Kou, Taiji,Zhu, Jianguo,Xie, Zubin,et al. Effect of elevated atmospheric co2 concentration on soil and root respiration in winter wheat by using a respiration partitioning chamber[J]. Plant and soil,2007,299(1-2):237-249. |
| APA | Kou, Taiji,Zhu, Jianguo,Xie, Zubin,Hasegawa, Toshihiro,&Heiduk, Katia.(2007).Effect of elevated atmospheric co2 concentration on soil and root respiration in winter wheat by using a respiration partitioning chamber.Plant and soil,299(1-2),237-249. |
| MLA | Kou, Taiji,et al."Effect of elevated atmospheric co2 concentration on soil and root respiration in winter wheat by using a respiration partitioning chamber".Plant and soil 299.1-2(2007):237-249. |
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来源：中国科学院大学
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