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| 高产水稻田氮磷排放监测及特征分析 |
| M onitoring and Characteristic Analysison Nitrogen and Phosphorus Releasesfrom High-yield Paddyfield |
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| DOI： |
| 中文关键词: 水稻田 氮 磷 排放 监测 |
| 英文关键词: Paddyfield Nitrogen Phosphorus Release Monitoring |
| 基金项目:江苏省基础研究计划基金资助项目 (BK2007734); 常州市农业科技攻关计划基金资助项目 (CE2008211); 江苏省高校“青蓝工程 ”中青年学术带头人基金资助项目 (QLG06010002) |
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| 中文摘要: |
| 通过设立田间定位监测点, 对高产水稻田的水及氮、磷的输入和排出进行了3年的定点监测, 根据监测结果分析了稻田的氮、磷迁移特征和规律。结果表明, 每 667 m 2 稻田氮排出量约3 000 g, 磷排出量约82 g; 随降雨及灌溉水带入的氮约1 600 g, 磷约 59 g; 两者相抵, 表观净排出氮约为1 400 g, 磷约23 g 。 稻田氮、磷排出与稻田排水量及基面肥施用量有关。 改进稻田氮肥施用时间和施用方法 , 合理管理稻田水量, 减少排水, 是减少高产水稻田氮、磷排放的关键技术措施。 |
| 英文摘要: |
| Theimportand exportofwater, nitrogen (N) and phosphorus(P) in high-yield paddyfield had been monitored, with fieldin-situ investigation, forthree years. The characteristicsand rulesofN and P trans portwere analyzed accordingto the monitoring. The resultsshowed thatN and P exportwere3 000 g and 82 gper667 m 2 respectively, and N and P importsfrom rainfallandirrigation were1600 g and 59 gper667 m 2 . So the netexportsofN and P from paddyfield were1400 g and 23 gper667 m 2 respectively. TheexportsofN and P were related to field drainage and fertilizing. The keywaysforreducingN and P releasesfrom high-yield pad dyfield were suitabletimesand methodsofN supply, aswellasreasonable watermanagementforlessdrainage. |
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