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| 温带牧草地牧草干物质量和N素产量的空间格局的时间稳定性 | |
| 作者姓名： | XU Hong-Wei WANG Ke J. S. BAILEY C. JORDAN A. WITHERS |
| 作者单位： | [1]College of Environment and Resources, Zhejiang University, Hangzhou 310029 ,China [2]Department of Agriculture and Rural Development, Agricultural Food and Environmental Science Division, Newforge Lane, Belfast BT9 5PX （United Kingdom） [3]Department of Agriculture and Rural Development, Plant Testing Station, 50 Houston Road, Crossnacreevy, Belfast BT6 9SH （United Kingdom） |
| 基金项目： | Project supported by the Higher Education Links between China and UK （No. SHA/992/308）. |
| 摘 要： | The objectives of the present study were to examine the spatial patterns of sward dry matter （DM） and nitrogen （N） yields in a grass silage field at first, second, and third cuts over a 3-year period; quantify their temporal stabilities with temporal stability maps; and assess the potential for site-specific management in each pasture-growing period using classified management maps. At cut 1, the spatial patterns of DM and N yields proved to be well defined and temporally stable and were likely to be due to differences in the net N mineralization rates across the field during spring. In contrast, at cut 2, the patterns of DM production were patchy and temporally unstable. It was concluded that, in principle, a simple site-specific approach to N fertilization would be possible in this field during spring at cut 1. At later harvests, the rationale for a site-specific approach to fertilizer management was less clear with logistics appearing to be more complex and less feasible. |
| 关 键 词： | 草原 空间变异性 氮 精细农业 土壤 |
| 收稿时间： | 2006-06-14 |
| 修稿时间： | 2006-09-19 |
Temporal stability of sward dry matter and nitrogen yield patterns in a temperate grassland |
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| XU Hong-Wei,WANG Ke,J. S. BAILEY,C. JORDAN,A. WITHERS.Temporal stability of sward dry matter and nitrogen yield patterns in a temperate grassland[J].Pedosphere,2006,16(6):735-744. | |
| Authors: | XU Hong-Wei WANG Ke J S BAILEY C JORDAN and A WITHERS |
| Institution: | aCollege of Environment and Resources, Zhejiang University, Hangzhou 310029 (China) bDepartment of Agriculture and Rural Development, Agricultural Food and Environmental Science Division, Newforge Lane, Belfast BT9 5PX (United Kingdom) cDepartment of Agriculture and Rural Development, Plant Testing Station, 50 Houston Road, Crossnacreevy, Belfast BT6 9SH (United Kingdom) |
| Abstract: | The objectives of the present study were to examine the spatial patterns of sward dry matter (DM) and nitrogen (N) yields in a grass silage field at first, second, and third cuts over a 3-year period; quantify their temporal stabilities with temporal stability maps; and assess the potential for site-specific management in each pasture-growing period using classified management maps. At cut 1, the spatial patterns of DM and N yields proved to be well defined and temporally stable and were likely to be due to differences in the net N mineralization rates across the field during spring. In contrast, at cut 2, the patterns of DM production were patchy and temporally unstable. It was concluded that, in principle, a simple site-specific approach to N fertilization would be possible in this field during spring at cut 1. At later harvests, the rationale for a site-specific approach to fertilizer management was less clear with logistics appearing to be more complex and less feasible. |
| Keywords: | cool temperate grassland dry matter yield spatial variability temporal stability |
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