| 长期施肥条件下黄土旱塬土壤NO3--N的淋溶分布规律 |
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| 引用本文： | 党廷辉,郭胜利,樊军,郝明德. 长期施肥条件下黄土旱塬土壤NO3--N的淋溶分布规律[J]. 生态学杂志, 2003, 0(8): 1265-1268 |
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| 作者姓名： | 党廷辉 郭胜利 樊军 郝明德 |
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| 作者单位： | 1. 中国科学院水利部水土保持研究所, 杨凌 712100;2. 西北农林科技大学水土保持研究所, 杨凌 712100 |
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| 基金项目： | 国家“十五”科学技术攻关项目(2001BA508B18);中国科学院知识创新工程资助项目(KZCXZ4135) |
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| 摘 要： | 在黄土旱塬区,长期施肥对土壤剖面NO3--N含量和分布有显著影响.施用化学氮肥,土壤剖面中出现NO3--N的淋溶与深层累积,而施用磷肥和有机肥有减弱NO3--N向更深层淋溶的作用.单施氮肥处理(N),NO3--N的累积峰深度最大,为120～200cm;N、P有机肥配施处理(NPM),NO3--N的累积峰值最高,但峰深度降低至60～120cm;N、P配施(NP)累积深度为80～140cm.不施氮肥,分布在土壤剖面中NO3--N含量显著降低.氮肥用量愈大,NO3--N的累积量愈大.N、P配施可以有效降低NO3--N累积.在同一氮肥用量下,NO3--N累积量随磷肥用量的增加而减少.
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| 关 键 词： | 长期施肥 NO3--N分布规律 黄土旱塬 |
| 收稿时间： | 2001-09-24 |
NO3--N leaching and distribution in soil profile in dry highland of Loess Plateau under long-term fertilization |
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| DANG Tinghui,GUO Shengli,FAN Jun,HAO Mingde. NO3--N leaching and distribution in soil profile in dry highland of Loess Plateau under long-term fertilization[J]. Chinese Journal of Ecology, 2003, 0(8): 1265-1268 |
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| Authors: | DANG Tinghui GUO Shengli FAN Jun HAO Mingde |
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| Affiliation: | 1. Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China;2. Institute of Soil and Water Conservation, Northwest Science Technology University of Agriculture and Forestry, Yangling 712100, China |
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| Abstract: | The NO3--N accumulation and distribution in soil profile of Loess Plateau dry highland were studied by long term field trials. The results showed that NO3--N was accumulated in the soil profile under N fertilization. Application of Pfertilizer or organic manure reduced the NO3--N content and its leaching depth in the soil profile. The deepest depth of NO3--N accumulation was 120～200 cm under N treatment, and the peak of the accumulation was the highest in NPMtreatment, with the depth of 60～120 cm. The NO3--N accumulation depth was 80～140 cm for NP. Without nitrogen application, there was no evident accumulation of NO3--N in soil profile. The more nitrogen used, the more NO3--N accumulated in soil profile. Under the same nitrogen application rate, NO3--N accumulation might decrease with increasing Papplication. |
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| Keywords: | Long term fertilization NO3--N distribution pattern Loess Plateau dry highland |
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