Nutrient budgets and biogeochemistry in an experimental agricultural watershed in Southeastern China
文献类型：期刊论文
| 作者 | Yan, WJ ; Yin, CQ; Zhang, S
|
| 刊名 | BIOGEOCHEMISTRY
 |
| 出版日期 | 1999-04-01 |
| 卷号 | 45期号:1页码:1-19 |
| 关键词 | Chaohu Lake Chemical Fertilizer Cycling Denitrification Multipond System Nitrogen Nutrient Budget Phosphorus |
| 文献子类 | Article |
| 英文摘要 | During a two-year held study, an annual nutrient budget and cycles were developed for a small agricultural watershed. The study emphasized the integrated unit of the watershed in understanding the biogeochemistry. It was found that the total nutrient input was 39.1 x 10(4) kg nitrogen and 3.91 x 10(4) kg phosphorus in the year 1995, of which the greatest input of nutrients to the watershed was chemical fertilizer application, reaching 34.7 x 10(4) kg (676 kg/ha) nitrogen and 3.88 x 10(4) kg (76 kg/ha) phosphorus. The total nutrient output from the watershed was 13.55 x 10(4) kg nitrogen and 0.40 x 10(4) kg phosphorus, while the largest output of nitrogen was denitrification, accounting for 44.1% of N output; the largest output of phosphorus was sale of crops, accounting for 99.4% of P output. The results show that the nutrient input is larger than output, demonstrating that there is nutrient surplus within the watershed, a surplus which may become a potential source of nonpoint pollution to area waters. |
| WOS关键词 | TOTAL PHOSPHORUS ; SOIL ; NITROGEN ; LOSSES |
| 语种 | 英语 |
| WOS记录号 | WOS:000078939900001 |
| 出版者 | KLUWER ACADEMIC PUBL |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/68217]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yan, WJ |
| 作者单位 | 1.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Inst Geog, Dept Environm Qual, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, WJ,Yin, CQ,Zhang, S. Nutrient budgets and biogeochemistry in an experimental agricultural watershed in Southeastern China[J]. BIOGEOCHEMISTRY,1999,45(1):1-19. |
| APA | Yan, WJ,Yin, CQ,&Zhang, S.(1999).Nutrient budgets and biogeochemistry in an experimental agricultural watershed in Southeastern China.BIOGEOCHEMISTRY,45(1),1-19. |
| MLA | Yan, WJ,et al."Nutrient budgets and biogeochemistry in an experimental agricultural watershed in Southeastern China".BIOGEOCHEMISTRY 45.1(1999):1-19. |
入库方式： OAI收割
来源：地理科学与资源研究所
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