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- W2390616012 abstract "Nitrogen loss modulus is one of the basic parameters in the studyi n g of regional nitrogen cycling and nitrogen balance, and the study of this param eter can help assess the utilizing efficiency of the nitrogen fertilizer from th e perspective of a large area. The nitrogen loss moduli of the 19 principal trib utaries of the Yellow River, calculated from many years' data of their averaged river flux and nitrogen concentration, ranged from 0.073～1.665 t·km-2·a-1, which were obviously positively related to the population and agricultural intensity of the region. The nitrogen loss moduli obtained from the mainstream data were less than those from tributaries' because of the 'area scale effect', and the nitrogen loss moduli at different stations along the mainstream of the Y ellow River varied slightly. On the other hand, the nitrogen loss moduli of the Yellow River Basin increased greatly since 1990s: the 1995's value of Toudaoguai Station in the Mid Reaches was 4 times higher than decade before, meanwhile the value of the Lower Reaches Station Huayuankou doubled from 1986 to 1996. We fou nd that the nitrogen was leached from the Valley primarily in the dissolved form and existed in liquid phase, having little relationship with the sediment erosi on modulus in the Yellow River Basin. The nitrogen loss modulus of the Yellow Ri ver Basin based on Huayuankou Station was less than that of Yangtze River based on Datong Station. The nitrogen fertilizer loss ratio (total nitrogen loss to to tal amount of nitrogen fertilizer applied in the Basin) tended to increase in th e late 1990s in the Yellow River Basin, 12%increasing from 1997 to 1998 and 1 8%increasing from 1998 to 1999. The authors call on that this situation shoul d be attached great importance to our researchers of fertilizer, researchers of environment protection and concerned governmental decision-making departments." @default.
- W2390616012 created "2016-06-24" @default.
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- W2390616012 date "2004-01-01" @default.
- W2390616012 modified "2023-09-22" @default.
- W2390616012 title "Characteristics of Nitrogen Loss Modulus in the Yellow River Basin" @default.
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