Effects of increased residue biomass under elevated CO2 on carbon and nitrogen in soil aggregate size classes (rice-wheat rotation system, China)
文献类型：期刊论文
| 作者 | Ma, Hong L.1; Zhu, Jian G.2; Xie, Zu B.2; Liu, Gang2; Zeng, Qing2 |
| 刊名 | CANADIAN JOURNAL OF SOIL SCIENCE
 |
| 出版日期 | 2009-11-01 |
| 卷号 | 89期号:5页码:567-577 |
| 关键词 | Elevated CO2 nitrogen levels aggregate turnover carbon and nitrogen fractions rice-wheat cropping addition of straw |
| ISSN号 | 0008-4271 |
| 通讯作者 | Ma, Hong L.() |
| 英文摘要 | Ma, H. L., Zhu, J. G., Xie, Z. B., Liu, G. and Zeng, Q. 2009. Effects of increased residue biomass under elevated CO2 on carbon and nitrogen in soil aggregate size classes (rice-wheat rotation system, China). Can. J. Soil Sci. 89: 567-577. In order to study how soil carbon and nitrogen contents of different aggregate size fractions are affected by an increase in crop biomass and additional carbon inputs to Soil due to elevated [CO2], a field experiment under a free-air CO2 enrichment (FACE) system was conducted. The experiment was set up with two CO2 levels [ambient CO2 and elevated CO2 (ambient + 200 mol mol(-1))] and three N levels [low N (LN), 150 kg N ha(-1) and 90 kg N ha(-1), normal N (NN), 250 kg N ha(-1) and 180 kg N ha(-1), and high N (HN) 350 kg N ha(-1) and 250 kg N ha(-1) during the rice and wheat seasons. respectively] and straw was added at the same soil:biomass ratio as in the field during the rice and wheat seasons. Compared with ambient CO2, little change was observed in the percentage distribution of soil fractions, carbon and nitrogen content, and C:N ratio in each soil fraction Under elevated CO2 from 2001 to 2003. However, after the soil was cultivated with straw at two CO2 levels, as 1 ratio of biomass to Field area for 1 yr, elevated CO2 decreased the percentage distribution of the rnacroaggregate (>250 mu m) and microaggregate (53-250 mu m) fractions by 28.9% (P <0.01) and 27.8% (P <0.01), respectively, and increased that of the clay- and silt-sized (<53 mu m) fraction by 38.2%) (P <0.01). Elevated CO2 increased the carbon concentration by 4-41% and increased the nitrogen concentration by 0-30% compared with ambient CO2 with the largest increases of 41.2% (P <0.01) and 30.2% (P <0.05), respectively, in the rnacroaggregate fraction with NN. Elevated CO2 decreased the contributions of soil carbon and nitrogen contents, respectively, in each fraction, to the whole soil by 13.1 and 17.2% in macroaggregates and by 12.9% (P <0.05) and 16.9% (P <0.01) in microaggregate, but increased them, on average, by 47.6% (P <0.01) and 44.4% (P <0.01), respectively, in the clay- and silt-sized fractions. The changes in soil C:N due to elevated CO2 were largest in the <53 mu m fraction with LN and in the >250 mu m fraction with NN and HN. These results Suggest that adding straw is an important factor for soil structure and function with regard to soil carbon and nitrogen storage and cycling under FACE. |
| 收录类别 | SCI |
| WOS关键词 | ORGANIC-MATTER STABILIZATION ; BELOW-GROUND CARBON ; ATMOSPHERIC CO2 ; ENRICHMENT FACE ; POPLAR PLANTATION ; LITTER CHEMISTRY ; MINERAL SOIL ; DECOMPOSITION ; RESPONSES ; FOREST |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000272478400004 |
| 出版者 | AGRICULTURAL INST CANADA |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558755 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Ma, Hong L. |
| 作者单位 | 1.Fujian Normal Univ, Sch Geog Sci, Minist Educ,Fujian Prov Key Lab Subtrop Resources, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350007, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Hong L.,Zhu, Jian G.,Xie, Zu B.,et al. Effects of increased residue biomass under elevated CO2 on carbon and nitrogen in soil aggregate size classes (rice-wheat rotation system, China)[J]. CANADIAN JOURNAL OF SOIL SCIENCE,2009,89(5):567-577. |
| APA | Ma, Hong L.,Zhu, Jian G.,Xie, Zu B.,Liu, Gang,&Zeng, Qing.(2009).Effects of increased residue biomass under elevated CO2 on carbon and nitrogen in soil aggregate size classes (rice-wheat rotation system, China).CANADIAN JOURNAL OF SOIL SCIENCE,89(5),567-577. |
| MLA | Ma, Hong L.,et al."Effects of increased residue biomass under elevated CO2 on carbon and nitrogen in soil aggregate size classes (rice-wheat rotation system, China)".CANADIAN JOURNAL OF SOIL SCIENCE 89.5(2009):567-577. |
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来源：南京土壤研究所
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