| Ammonium transformation in paddy soils affected by the presence of nitrate | |
| Cai, ZC | |
| 刊名 | NUTRIENT CYCLING IN AGROECOSYSTEMS
 |
| 2002-07-01 | |
| 卷号 | 63期号:2-3页码:267-274 |
| 关键词 | ammonium coupled nitrification and denitrification nitrate paddy soil |
| ISSN号 | 1385-1314 |
| 通讯作者 | Cai, ZC() |
| 英文摘要 | Coupled nitrification and denitrification is considered as one of the main pathways of nitrogen losses in paddy soils. The effect of NO3- on NH4+ transformation was investigated by using the N-15 technique. The paddy soils were collected from Wuxi (soil pH 5.84) and Yingtan (soil pH 5.02), China. The soils were added with either urea (18.57 mumol urea-N enriched with 60 atom% N-15 excess) plus 2.14 mumol KNO3-N (natural abundance) per gram soil (U+NO3) or urea alone (U). The KNO3 was added 6 days after urea addition. The incubation was carried out under flooded condition in either air or N-2 gas headspace at 25degreesC. The results showed that in air headspace, (NH4+)-N-15 oxidization was so fast that about 10% and 8% of added N-15 in the treatment U could be oxidized during the incubation period of 73 hours after KNO3 addition in Wuxi and Yingtan soil, respectively. The addition of KNO3 significantly inhibited (NH4+)-N-15 oxidation (p<0.01) in air headspace, while it stimulated (NH4+)-N-15 oxidation in N-2 gas headspace, although the oxidation was depressed by the N-2 gas headspace itself. Therefore, the accumulation of NO3- would inhibit further nitrification of NH4+ at micro-aerobic sites in paddy soils, especially in paddy soils with a low denitrification rate. On the other hand, NO3- would lead to oxidation of NH4+ in anaerobic bulk soils. |
| 收录类别 | SCI |
| WOS关键词 | NITROUS-OXIDE ; DENITRIFICATION RATES ; DETERMINING N-15 ; FLOODED SOILS ; RICE FIELDS ; NITRIFICATION ; WATER ; RHIZOSPHERE ; OXIDATION ; REACTOR |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| 出版者 | KLUWER ACADEMIC PUBL |
| WOS记录号 | WOS:000179358900016 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2559172 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Cai, ZC |
| 作者单位 | Chinese Acad Sci, Inst Soil Sci, LMCP, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, ZC. Ammonium transformation in paddy soils affected by the presence of nitrate[J]. NUTRIENT CYCLING IN AGROECOSYSTEMS,2002,63(2-3):267-274. |
| APA | Cai, ZC.(2002).Ammonium transformation in paddy soils affected by the presence of nitrate.NUTRIENT CYCLING IN AGROECOSYSTEMS,63(2-3),267-274. |
| MLA | Cai, ZC."Ammonium transformation in paddy soils affected by the presence of nitrate".NUTRIENT CYCLING IN AGROECOSYSTEMS 63.2-3(2002):267-274. |
| 个性服务 |
| 查看访问统计 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论