Recent trends and recommendations for nitrogen fertilization in intensive agriculture in eastern China
文献类型：期刊论文
| 作者 | Roelcke, M; Han, Y; Schleef, KH; Zhu, JG; Liu, G; Cai, ZC; Richter, J |
| 刊名 | PEDOSPHERE
 |
| 出版日期 | 2004-11-01 |
| 卷号 | 14期号:4页码:449-460 |
| 关键词 | agro-economy N fertilization non-point source pollution rice-wheat rotation Taihu Region |
| ISSN号 | 1002-0160 |
| 通讯作者 | Roelcke, M(m.roelcke@tu-bs.de) |
| 英文摘要 | The Taihu Region in eastern China is one of China's most intensive agricultural regions and also one of the economically most developed areas. High nitrogen balance surpluses in the summer rice-winter wheat double-cropping systems are leading to large-scale non-point source pollution of aquifers. In an interdisciplinary approach, four-year (1995-1998) field trials were carried out in two representative areas (Jurong County and Wuxi City) of the Tailm Region. Five farmers' field sites were chosen in each of the 2 locations, with each site divided into "standard" (farmers' practice) and "reduced" (by 30%-40%) N fertilization. For both fertilization intensities, N balance surpluses and monetary returns from grain sales minus fertilizer expenditures were calculated in an economic assessment. Based on the field trials, the mineral N fertilizer application rates reduced by about 10% for rice and 20%-30% for wheat were recommended in 1999. Since 1999, the research focused on the trends in N fertilizer application rates and changes in grain and agricultural commodities prices. Summer rice N fertilizer use, in Wuxi City as of 2001, dropped by roughly 25%, while for winter wheat it decreased by 10%-20%, compared to the 1995-1998 period. This has been achieved not only by grain policy and price changes, but also by an increased environmental awareness from government officials. Nitrogen balance surpluses in Anzhen Town (of Wuxi City) have consequently diminished by 50%-75% in rice and by up to 40% in wheat, with reductions being achieved without concomitant decreases in physical grain yields or returns from sales minus fertilizer costs. |
| 收录类别 | SCI |
| WOS关键词 | TAI LAKE REGION ; ENVIRONMENT ; RICE |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000224774000005 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2559302 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Roelcke, M |
| 作者单位 | 1.Tech Univ Carolo Wilhelmina Braunschweig, Inst Geoecol, D-38106 Braunschweig, Germany 2.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China 3.Fed Agr Res Ctr, FAL, Inst Farm Econ, D-38116 Braunschweig, Germany |
| 推荐引用方式 GB/T 7714 | Roelcke, M,Han, Y,Schleef, KH,et al. Recent trends and recommendations for nitrogen fertilization in intensive agriculture in eastern China[J]. PEDOSPHERE,2004,14(4):449-460. |
| APA | Roelcke, M.,Han, Y.,Schleef, KH.,Zhu, JG.,Liu, G.,...&Richter, J.(2004).Recent trends and recommendations for nitrogen fertilization in intensive agriculture in eastern China.PEDOSPHERE,14(4),449-460. |
| MLA | Roelcke, M,et al."Recent trends and recommendations for nitrogen fertilization in intensive agriculture in eastern China".PEDOSPHERE 14.4(2004):449-460. |
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来源：南京土壤研究所
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