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| The enrichments of organic matter and total nitrogen in sediment as affected by relavant factors | |
| 引用本文： | ZHANG Xingchang,ZHENG Jiyong,LI Shiqing(State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Northwest Sci-tech University of Agriculture and Forestry,Yangling,Chin. The enrichments of organic matter and total nitrogen in sediment as affected by relavant factors[J]. 地理学报(英文版), 2004, 14(4): 495-502. DOI: 10.1007/BF02837494 |
| 作者姓名： | ZHANG Xingchang ZHENG Jiyong LI Shiqing(State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation Northwest Sci-tech University of Agriculture and Forestry Yangling Chin |
| 作者单位： | State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau，Institute of Soil and Water Conservation，Northwest Sci-tech University of Agriculture and Forestry，Yangling 712100，China |
| 基金项目： | State Key Basic Research and Development Plan of China，No.G2000018605，National Natural Science Foundation of China，No.40171063，No.40371076)，The Science Foundation of the State Key Laboratory of Soil Erosion and Dryfarming，CAS |
| 摘 要： | 1IntroductionResearch results have shown that overland flow firstly removes fine particles of topsoil because the fine soil particles can be easily transported in runoff (Burwell etal., 1975; Alberts etal., 1983; Gregory 1991). The component differences of fine soil particles between the sediment resulting from soil erosion and the original soil were studied (Meyer etal., 1975; Loch etal., 1982; Cogo, 1983). Sediment was normally composed of soil aggregates and particles of different diamet… |
| 收稿时间： | 2004-06-19 |
| 修稿时间： | 2004-09-02 |
The enrichments of organic matter and total nitrogen in sediment as affected by relavant factors |
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| ZHANG Xingchang,ZHENG Jiyong,LI Shiqing. The enrichments of organic matter and total nitrogen in sediment as affected by relavant factors[J]. Journal of Geographical Sciences, 2004, 14(4): 495-502. DOI: 10.1007/BF02837494 | |
| Authors: | ZHANG Xingchang ZHENG Jiyong LI Shiqing |
| Affiliation: | (1) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation, Northwest Sci-tech University of Agriculture and Forestry, 712100 Yangling, China |
| Abstract: | Serious soil erosion has already resulted in degradation of the Loess Plateau of China. Soil erosion is commonly accompanied by extensive soil nutrient loss. Because of enrichment processes, sediment nutrient content is often higher than that of natural soil. The objective of this study is to determine the enrichments of organic matter and total nitrogen in sediment in hilly and gully loess areas on the Loess Plateau of China. Measurements of enrichment ratios (ER) of organic matter (EROM) and total nitrogen (ERTN) in sediment as affected by rainfall, slope gradient, tillage, and fertilization were made in the field under natural rainfall conditions. The results showed that the enrichment of clay in sediment resulted in the enrichment of organic matter (OM) and total nitrogen (TN) in sediment. The averages of sediment clay ER, EROM and ERTN for the various slope gradients were 1.77, 2.09 and 1.61, respectively. The soil erosive module was negatively correlated with EROM and ERTN. Our results indicate that measures to reduce soil erosion, i.e. reducing rainfall erosivity, decreasing soil slope gradient, decreasing fertilizer use, and using level trenches, may increase EROM and ERTN. Both quantity and quality of sediment yield should be considered when implementing erosion control measures. |
| Keywords: | sediment organic matter total nitrogen enrichment ratio |
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