Soil acidification and nitrogen saturation from weathering of ammonium-bearing rock

Nature ◽  
1994 ◽  
Vol 368 (6474) ◽  
pp. 838-841 ◽  
Author(s):  
Randy A. Dahlgren
Keyword(s):  
Soil Acidification ◽  
Nitrogen Saturation

Decreases in inorganic nitrogen inputs and effects on nitrogen saturation and soil acidification

2019 ◽  
Vol 25 (1) ◽  
pp. 31-40
Author(s):  
Mitsuhisa Baba ◽  
Masanori Okazaki ◽  
Kazuhide Matsuda ◽  
Emu Shima ◽  
Fuka Tachiyanagi ◽  
...  
Keyword(s):  
Soil Acidification ◽  
Nitrogen Saturation ◽  
Inorganic Nitrogen ◽  
Nitrogen Inputs

Nitrous oxide production in two forested watersheds exhibiting symptoms of nitrogen saturation

1998 ◽  
Vol 28 (11) ◽  
pp. 1723-1732 ◽  
Author(s):  
William T Peterjohn ◽  
Richard J McGervey ◽  
Alan J Sexstone ◽  
Martin J Christ ◽  
Cassie J Foster ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Saturation ◽  
N Cycling ◽  
Woody Vegetation ◽  
N Saturation ◽  
Relative Importance ◽  
Forested Watersheds ◽  
Total N ◽  
Nitrous Oxide Production ◽  
Poorly Drained Soils

A major concern about N saturation is that it may increase the production of a strong greenhouse gas, nitrous oxide (N2O). We measured N2O production in two forested watersheds, a young, fertilized forest (WS 3) and an older, unfertilized forest (WS 4), to (i) assess the importance of N2O production in forests showing symptoms of N saturation; (ii) estimate the contribution of chemoautrophic nitrification to total N2O production; and (iii) examine the relative importance of factors that may control N2O production. During the study period, mean monthly rates of N2O production (3.41-11.42 µ N ·m-2·h-1) were consistent with measurements from other well-drained forest soils but were much lower than measurements from N-rich sites with poorly drained soils. Chemoautotrophic nitrification was important in both watersheds, accounting for 60% (WS 3) and 40% (WS 4) of total N2O production. In WS 3, N2O production was enhanced by additions of CaCO3 and may be constrained by low soil pH. In WS 4, N2O production on south-facing slopes was exceptionally low, constrained by low NO3 availability, and associated with a distinct assemblage of woody vegetation. From this observation, we hypothesize that differences in vegetation can influence N cycling rates and susceptibility to N saturation.

Effects of long-term nitrogen and phosphorus additions on soil acidification in an N-rich tropical forest

Geoderma ◽  
2017 ◽  
Vol 285 ◽  
pp. 57-63 ◽  
Author(s):  
Qinggong Mao ◽  
Xiankai Lu ◽  
Kaijun Zhou ◽  
Hao Chen ◽  
Xiaomin Zhu ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Soil Acidification ◽  
Nitrogen And Phosphorus
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