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应用生态学报 ›› 2003, Vol. ›› Issue (8): 1265-1268.

• 研究论文 • 上一篇    下一篇

长期施肥条件下黄土旱塬土壤NO3--N的淋溶分布规律

党廷辉1,2, 郭胜利1, 樊军1, 郝明德1   

  1. 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
  • 收稿日期:2001-09-24 修回日期:2002-04-08
  • 通讯作者: 党廷辉,男,1964年生,在职博士,副研究员.主要从事土壤作物营养与施肥研究,发表论文40余篇.E-mail:dangth@nwsuaf.edu.cn.
  • 基金资助:
    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)

NO3--N leaching and distribution in soil profile in dry highland of Loess Plateau under long-term fertilization

DANG Tinghui1,2, GUO Shengli1, FAN Jun1, HAO Mingde 1   

  1. 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
  • Received:2001-09-24 Revised:2002-04-08

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.

关键词: 长期施肥, NO3--N分布规律, 黄土旱塬

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.

Key words: Long term fertilization, NO3--N distribution pattern, Loess Plateau dry highland

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