[1]ZHAI Jiaying,HE Lirong,WU Yang,et al.Effects of Simulated Nitrogen Deposition on Soil Water-Soluble Carbon and Nitrogen Fractions and Their Spectral Characteristics in the Land of Pinus tabuliformis[J].Research of Soil and Water Conservation,2020,27(02):136-141,148.
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Effects of Simulated Nitrogen Deposition on Soil Water-Soluble Carbon and Nitrogen Fractions and Their Spectral Characteristics in the Land of Pinus tabuliformis
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
136-141,148
Column:
Public date:
2020-03-30
- Title:
- Effects of Simulated Nitrogen Deposition on Soil Water-Soluble Carbon and Nitrogen Fractions and Their Spectral Characteristics in the Land of Pinus tabuliformis
- Keywords:
- nitrogen deposition; water-soluble carbon and nitrogen fractions; three-dimensional fluorescence spectrum
- CLC:
- S151.9
- DOI:
- -
- Abstract:
- There is no consistent conclusion about the effect of atmospheric nitrogen deposition on the change of soil water-soluble carbon and nitrogen fractions. In order to study the effect of nitrogen deposition on soil water-soluble carbon and nitrogen fractions of forestland on the Loess Plateau, the simulated nitrogen deposition was conducted with the method of nitrogen addition into the Pine tabuliformis community. The four nitrogen addition gradients are CK[0 g/(m2·a)], N3[3 g/(m2·a)],N6[6(g/m2·a)],N9[9 g/(m2·a)]. The results showed that nitrogen addition increased soil water-soluble total nitrogen(WSN), water soluble nitrate nitrogen(WNO-3-N)content, which indicated the increasing trend with the increase of nitrogen addition level; content of water-soluble organic nitrogen(WSON)and water-soluble ammonium nitrogen(WNH+4-N), WSON/WSN decreased at first and then increased with nitrogen addition level; nitrogen addition had no significant effect on the contents of WSOC and the spectral characteristics of soil water-soluble organic matter; the fluorescence emission spectrum showed that the main humus types of soil water soluble organic matter were fulliacid-like substances and aromatic protein substances, fulliacid-like substances decreased at first and then increased with nitrogen addition level, and aromatic protein substances presented the increasing trend in the surface soil. Nitrogen deposition accumulates C and N in the soil through microbial transformation and fixation, and has impact on soil water-soluble organic matter. However, the mechanism of microbial and component distribution, coupling of various processes of element transformation and response to nitrogen deposition are still unclear.
- References:
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Last Update:
2020-02-25