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应用生态学报 ›› 2001, Vol. ›› Issue (4): 541-544.

• 研究论文 • 上一篇    下一篇

侵蚀泥沙、有机质和全氮富集规律研究

张兴昌, 邵明安   

  1. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100
  • 收稿日期:2000-03-20 修回日期:2000-07-10 出版日期:2001-07-25
  • 通讯作者: 张兴昌,男,1965年10月生,博士后,副研究员,硕士导师.主要从事水土保持与土壤N素营养关系研究,发表论文40余篇.E-mail:zhangxc@ms.iswc.ac.cn
  • 基金资助:
    中国科学院知识创新工程项目(KZCY2411);国家杰出青年科学基金资助项目(400251060)

Enrichment of organic matter and nitrogen in eroded bedloads

ZHANG Xingchang, SHAO Mingan   

  1. State Key Laboratory of Soil Erosion and Dryfarming on Loess Plateau, Yangling, Shaanxi 712100
  • Received:2000-03-20 Revised:2000-07-10 Online:2001-07-25

摘要: 在自然降雨下,研究降雨、坡度、耕作和施肥对侵蚀泥沙、有机质和全N富集率的影响,分析土壤和泥沙颗粒组成、富集与泥沙有机质和全N富集的关系,揭示土壤有机质和全N在泥沙中的富集规律.结果表明,泥沙粘粒的富集导致有机质和全N的富集,泥沙粘粒、有机质和全N富集率分别平均为1.77、2.09和1.61.土壤侵蚀模数与泥沙有机质和全N富集率呈显著的负相关关系,降雨、坡度、施肥和耕作措施对泥沙有机质富集作用的影响是通过减少土壤侵蚀模数来实现的,减少土壤侵蚀的措施可增加泥沙有机质和全N的富集.

关键词: 泥沙, 有机质, 全N, 富集

Abstract: Under natural rainfall,the influences of rainfall,slope gradient,tillage and fertilization on the enrichment ratio(ER)of organic matter(OM)and total nitrogen(TN)in eroded bedloads and the relationship between the ER and the composition of eroded bedloads was analyzed.The results showed that the enrichment of clay(ERclay)resulted in the enrichment of OM and TN,and the average value of ERclay,EROM and ERTN under different slope gradients was 1.77,2.09 and 1.61,respectively.The soil erosion module was negatively correlated with EROM and ERTN.The measures for soil erosion may increase the EROM and ERTN affected by rainfall,slope gradient,tillage and fertilization.

Key words: Bedload, Organic matter, Nitrogen, Enichment

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