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- W2380491759 abstract "The effects of nitrogen fertilizer and irrigation on the distributions and movement rules of ammonium nitrogen and nitrate nitrogen in loess layer were investigated in field. The results showed that the content of ammonium nitrogen was steadier than nitrate nitrogen in 0~10 m layers, the smallest content was 3μg N/g, and the biggest content was 8 μg N/g, most determining results ranged from 5.5 μg N/g to 6.5 μg N/g. By using nitrogen leaching flux equation, we calculated that the urea nitrogen leaching rate under 3 m soil layer was 13.2%~41.3% when nitrogen in tillage layer was poor, and it was 56.6%~83.5% when nitrogen in tillage layer was rich, it is indicated that the nitrogen leaching loss also occurred when the irrigation amount was higher, so both scientific application of nitrogen fertilizer and control irrigation amount is important in loess irrigation areas in order to increase fertilizer effect and protect ground water quality." @default.
- W2380491759 created "2016-06-24" @default.
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- W2380491759 date "2003-01-01" @default.
- W2380491759 modified "2023-09-25" @default.
- W2380491759 title "Effect of Irrigation on Urea Leaching Characteristic in Loess Layer" @default.
- W2380491759 hasPublicationYear "2003" @default.
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