Nitrogen cycling and losses under rice-wheat rotations with coated urea and urea in the Taihu Lake region
文献类型：期刊论文
| 作者 | Wang Xiao-Zhi; Zhu Jian-Guo; Gao Ren; Yasukazu, H.; Feng Ke |
| 刊名 | PEDOSPHERE
 |
| 出版日期 | 2007-02-01 |
| 卷号 | 17期号:1页码:62-69 |
| 关键词 | ammonia volatilization coated urea N cycling percolation runoff |
| ISSN号 | 1002-0160 |
| 通讯作者 | Wang Xiao-Zhi(xiaozhiwang@hotmail.com) |
| 英文摘要 | A lysimeter experiment with undisturbed soil profiles was carried out to study nitrogen cycling and losses in a paddy soil with applications of coated urea and urea under a rice-wheat rotation system in the Taihu Lake region from 2001 to 2003. Treatments for rice and wheat included urea at conventional, 300 (rice) and 250 (wheat) kg N ha(-1), and reduced levels, 150 (rice) and 125 (wheat) kg N ha(-1), coated urea at two levels, 100 (rice) and 75 (wheat) kg N ha(-1), and 150 (rice) and 125 (wheat) kg N ha-1, and a control with no nitrogen arranged in a completely randomized design. The results under two rice-wheat rotations showed that N losses through both NH3 volatilization and runoff in the coated urea treatments were much lower than those in the urea treatments. In the urea treatments N runoff losses were significantly (P < 0.001) positively correlated (r = 0.851) with applied N. N concentration in surface water increased rapidly to maximum two, days after urea application and then decreased quickly. However, if there was no heavy rain within five days of fertilizer application, the likelihood of N loss by runoff was not high. As the treatments showed little difference in N loss via percolation, nitrate N in the groundwater of the paddy,fields was not directly related to N leaching. The total yield of the two rice-wheat rotations in the treatment of coated urea at 50% conventional level was higher than that in the treatment of urea at the conventional level. Thus, coated urea was more favorable to rice production and environmental protection than urea. |
| 收录类别 | SCI |
| WOS关键词 | AMMONIA VOLATILIZATION ; FIELD ; DENITRIFICATION ; CHINA ; SOIL |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000245046200008 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558682 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Wang Xiao-Zhi |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State KEy Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Yangzhou Univ, Environm Sci & Engn Coll, Yangzhou 225009, Peoples R China 3.Fujian Normal Univ, Fuzhou 350007, Peoples R China 4.Japan Int Res Ctr Agr Sci, Tsukuba 3058686, Japan |
| 推荐引用方式 GB/T 7714 | Wang Xiao-Zhi,Zhu Jian-Guo,Gao Ren,et al. Nitrogen cycling and losses under rice-wheat rotations with coated urea and urea in the Taihu Lake region[J]. PEDOSPHERE,2007,17(1):62-69. |
| APA | Wang Xiao-Zhi,Zhu Jian-Guo,Gao Ren,Yasukazu, H.,&Feng Ke.(2007).Nitrogen cycling and losses under rice-wheat rotations with coated urea and urea in the Taihu Lake region.PEDOSPHERE,17(1),62-69. |
| MLA | Wang Xiao-Zhi,et al."Nitrogen cycling and losses under rice-wheat rotations with coated urea and urea in the Taihu Lake region".PEDOSPHERE 17.1(2007):62-69. |
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来源：南京土壤研究所
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