The biogeochemical influences of NO3−, dissolved O2, and dissolved organic C on stream NO3− uptake

2009 ◽  
Vol 28 (4) ◽  
pp. 894-907 ◽  
Author(s):  
Joseph A. Thouin ◽  
Wilfred M. Wollheim ◽  
Charles J. Vörösmarty ◽  
Jennifer M. Jacobs ◽  
William H. McDowell
Keyword(s):  
Organic C ◽  
Dissolved Organic C ◽  
Dissolved O2

Influence of rice straw on priming of soil C for dissolved organic C and CH4 production

2017 ◽  
Vol 417 (1-2) ◽  
pp. 231-241 ◽  
Author(s):  
Rongzhong Ye ◽  
William R. Horwath
Keyword(s):  
Rice Straw ◽  
Organic C ◽  
Soil C ◽  
Dissolved Organic C ◽  
Ch4 Production

scholarly journals Response of Soil C and N, Dissolved Organic C and N, and Inorganic N to Short-Term Experimental Warming in an Alpine Meadow on the Tibetan Plateau

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Cheng-Qun Yu ◽  
Zhen-Xi Shen ◽  
Xian-Zhou Zhang ◽  
Wei Sun ◽  
Gang Fu
Keyword(s):  
Alpine Meadow ◽  
The Tibetan Plateau ◽  
Experimental Warming ◽  
Inorganic N ◽  
Short Term ◽  
Total N ◽  
Organic C ◽  
Dissolved Organic C ◽  
Short Period ◽  
C And N

Although alpine meadows of Tibet are expected to be strongly affected by climatic warming, it remains unclear how soil organic C (SOC), total N (TN), ammonium N(NH4+-N), nitrate N(NO3+-N), and dissolved organic C (DOC) and N (DON) respond to warming. This study aims to investigate the responses of these C and N pools to short-term experimental warming in an alpine meadow of Tibet. A warming experiment using open top chambers was conducted in an alpine meadow at three elevations (i.e., a low (4313 m), mid-(4513 m), and high (4693 m) elevation) in May 2010. Topsoil (0–20 cm depth) samples were collected in July–September 2011. Experimental warming increased soil temperature by ~1–1.4°C but decreased soil moisture by ~0.04 m3m−3. Experimental warming had little effects on SOC, TN, DOC, and DON, which may be related to lower warming magnitude, the short period of warming treatment, and experimental warming-induced soil drying by decreasing soil microbial activity. Experimental warming decreased significantly inorganic N at the two lower elevations,but had negligible effect at the high elevation. Our findings suggested that the effects of short-term experimental warming on SOC, TN and dissolved organic matter were insignificant, only affecting inorganic forms.

scholarly journals Effects of sunlight on decomposition of estuarine dissolved organic C, N and P and bacterial metabolism

2005 ◽  
Vol 40 ◽  
pp. 25-35 ◽  
Author(s):  
SL McCallister ◽  
JE Bauer ◽  
J Kelly ◽  
HW Ducklow
Keyword(s):  
Bacterial Metabolism ◽  
Organic C ◽  
Dissolved Organic C

Chemical losses off dairy catchments located on a texture-contrast soil: carbon, phosphorus, sulfur, and other chemicals

Soil Research ◽  
1998 ◽  
Vol 36 (6) ◽  
pp. 979 ◽  
Author(s):  
N. K. Fleming ◽  
J. W. Cox
Keyword(s):  
Environmental Impact ◽  
Soil Carbon ◽  
Overland Flow ◽  
South Australia ◽  
Farming Practices ◽  
Organic C ◽  
Dissolved Organic C ◽  
Texture Contrast ◽  
Minimal Environmental Impact ◽  
Dissolved Form

Runoff (overland flow and A/B horizon interflow) from 2 grazed dairy pastures at Flaxley, South Australia, accounted for <15% of April{October rainfall in 1996; 88{96% of runoff was overland flow. A range of chemicals, including carbon (C), phosphorus (P), and sulfur (S), was measured in runoff As much as 2·3 kg P/ha, 10·7 kg/ha of total dissolved C, and 1·8 kg S/ha was lost from the catchments in that year. Loads of other chemicals ranged from 0·6 g/ha (boron) to 39·8 kg/ha (aluminium). Over 92% of P, 76% of total dissolved C, and 93% of S was lost in overland flow. Between 50% and 60% of P, and 60% and 85% of S, was in the dissolved form; 64-96% of total dissolved C was dissolved organic C. Other chemicals varied from 0% (aluminium) to 97% (sodium) as the dissolved form. Relatively high losses of P and dissolved organic C are important to a dairy industry which is under increasing pressure to demonstrate minimal environmental impact from farming practices.

Vertical transport of dissolved organic C and N under long-term N amendments in pine and hardwood forests

1996 ◽  
Vol 35 (3) ◽  
pp. 471-505 ◽  
Author(s):  
William S. Currie ◽  
John D. Aber ◽  
William H. McDowell ◽  
Richard D. Boone ◽  
Alison H. Magill
Keyword(s):  
Hardwood Forests ◽  
Vertical Transport ◽  
Organic C ◽  
Dissolved Organic C ◽  
C And N
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