| 长期地膜覆盖对棕壤剖面中NH_4~+-N和NO_3~--N动态变化的影响 |
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| 引用本文： | 刘顺国,汪景宽.长期地膜覆盖对棕壤剖面中NH_4~+-N和NO_3~--N动态变化的影响[J].土壤通报,2006,37(3):443-446. |
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| 作者姓名： | 刘顺国 汪景宽 |
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| 作者单位： | 沈阳农业大学,土地与环境学院,辽宁,沈阳,110161 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 棕壤长期定位试验结果表明,覆膜使表层土壤中NH4+-N含量明显增加,并使各个层次NO3--N含量都有所增加,有效地减少了NO3--N的淋失。研究同时表明施用有机肥和化肥都能提高土壤全氮、碱解氮、NH4+-N、NO3--N含量,而施用单一的氮肥则对土壤碱解氮几乎没有影响。因此,有机肥与无机肥配合施用是培肥覆膜土壤氮素肥力的有效措施。
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| 关 键 词： | 地膜覆盖 棕壤 NH4+-N NO3--N |
| 文章编号： | 0564-3945(2006)03-0443-04 |
| 修稿时间： | 2005年3月28日 |
Effect of Long-term Covering with Plastic Film on NH4+-N and NO3--N in Depth Profile of Brown Earth |
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| LIU Shun-guo,WANG Jing-kuan.Effect of Long-term Covering with Plastic Film on NH4+-N and NO3--N in Depth Profile of Brown Earth[J].Chinese Journal of Soil Science,2006,37(3):443-446. |
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| Authors: | LIU Shun-guo WANG Jing-kuan |
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| Abstract: | An experiment was conducted on the loamy brown earth derived from loess-like parent materials near Shenyang Agricultural University during 1987-2003.The main results showed that the average contents of alkali-hydrolyzable-N(1mol NaOH-N) and total N in all covered treatments increased.The average contents of NH~ _4-N in the topsoil and the NO~-_3-N in all layers were enhanced in all covered treatments.Also in all covered treatments the leaching of NO~-_3-N declined.In addition,the application of organic manure could improve the levels of total N,alkali-hydrolyzable-N,NO~-_3-N and NH~ _4-N in the soil.However,the single N treatment had little effect on alkali-hydrolyzable-N.Therefore,more manure should be applied to the soil covered with plastic film so as to improve soil fertility. |
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| Keywords: | NH 4-N NO-3-N |
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