Nitrogen mineralization in paddy soils of the Taihu Region of China under anaerobic conditions: dynamics and model fitting
文献类型：期刊论文
| 作者 | Li, HL; Han, Y; Cai, ZC |
| 刊名 | GEODERMA
 |
| 出版日期 | 2003-08-01 |
| 卷号 | 115期号:3-4页码:161-175 |
| 关键词 | paddy soil nitrogen mineralization anaerobic incubation model simulation |
| ISSN号 | 0016-7061 |
| DOI | 10.1016/S0016-7061(02)00385-0 |
| 通讯作者 | Li, HL() |
| 英文摘要 | The processes and characteristics of nitrogen mineralization in paddy soils of the Taihu Region of China were studied with 120-day anaerobic incubation at 25 and 35 degreesC. Results showed that the organic nitrogen mineralized ranged from 4.0% to 9.4% of total N (60-241 mg kg(-1)) and that the mineral N was only correlated with total N (partial correlation analysis). The pH changed greatly and was related to the mineral nitrogen contents during mineralization. Temperature was one of the main factors influencing the mineralization of nitrogen. Four models, (1) effective cumulated temperature model; (2) a one-component, first-order exponential model (one-pool model); (3) a two-component, first-order exponential model (two-pool model); and (4) a two-component, mixed first- and zero-order exponential model including a constant term (special model), were fitted to the observed mineral N vs. incubation days using a non-linear regression procedure. The exponential models were significantly better than the effective cumulated temperature model, and the two-pool model and the special model gave the best fits among the four models. The special model was the unique one that could appropriately reflect the responses of organic nitrogen mineralization to incubation temperature in all studied paddy soils. All results showed that the special model made a better prediction of nitrogen mineralization under flooded conditions than the other models. (C) 2002 Elsevier Science B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | ORGANIC-MATTER ; NET NITROGEN ; N-MINERALIZATION ; FIELD CONDITIONS ; AMENDED SOIL ; TEMPERATURE ; INCUBATION ; MOISTURE ; POTENTIALS ; FRACTIONS |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000183916600001 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2559233 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Li, HL |
| 作者单位 | Chinese Acad Sci, Inst Soil Sci, Lab Mat Cycling Pedosphere, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, HL,Han, Y,Cai, ZC. Nitrogen mineralization in paddy soils of the Taihu Region of China under anaerobic conditions: dynamics and model fitting[J]. GEODERMA,2003,115(3-4):161-175. |
| APA | Li, HL,Han, Y,&Cai, ZC.(2003).Nitrogen mineralization in paddy soils of the Taihu Region of China under anaerobic conditions: dynamics and model fitting.GEODERMA,115(3-4),161-175. |
| MLA | Li, HL,et al."Nitrogen mineralization in paddy soils of the Taihu Region of China under anaerobic conditions: dynamics and model fitting".GEODERMA 115.3-4(2003):161-175. |
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来源：南京土壤研究所
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