| 氮素在紫色土中的移动和淋失研究 |
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| 引用本文： | 余贵芬,毛知耘.氮素在紫色土中的移动和淋失研究[J].西南农业大学学报,1999,21(3):228-232. |
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| 作者姓名： | 余贵芬 毛知耘 |
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| 作者单位： | 西南农业大学资源环境学院 |
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| 摘 要： | 利用渗漏池研究了氮肥品种，用量对３种紫色土中ＮＯ３－Ｎ移动和淋失的影响，结果表明，旱作小麦生长期间淋失氮素主要是ＮＯ３－Ｎ，苗期是ＮＯ３－Ｎ移动最强的时期，下移后主要分布于２０－６０ｃｍ土层，以后各层中ＮＯ３－Ｎ逐渐稳定。
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| 关 键 词： | 氮肥 紫色土 移动 淋失 |
STUDY OF N MIGRATION AND LEACHING LOSS IN PURPLE SOILS |
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| Yu Guifen, Mao Zhiyun, Shi Xiaojun, Liu Hongbin.STUDY OF N MIGRATION AND LEACHING LOSS IN PURPLE SOILS[J].Journal of Southwest Agricultural University,1999,21(3):228-232. |
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| Authors: | Yu Guifen Mao Zhiyun Shi Xiaojun Liu Hongbin |
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| Abstract: | The effects of N fertilizer rate and variety on the migration and leaching loss of NO3N in three purple soils were studied in percolating pools. The results showed that during the growing period of the dryland crop wheat N leached mainly as NO3N, and NO3N showed strongest migration at the seedling stage of the plants and was distributed chiefly in the 2060 cm layer, whereafter it became gradually stable. NO3N pollution of the shallow groundwater was observed 40 days after seedling emergence, suggesting that reducing N topdressing rates can decrease NO3N pollution. |
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| Keywords: | nitrongenous fertilizers purple soils translational motion leaching loss |
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