scholarly journals Effects of agricultural land use on dissolved organic carbon and nitrogen in surface runoff and subsurface drainage

2018 ◽  
Vol 618 ◽  
pp. 1519-1528 ◽  
Author(s):  
Noora Manninen ◽  
Helena Soinne ◽  
Riitta Lemola ◽  
Laura Hoikkala ◽  
Eila Turtola
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Surface Runoff ◽  
Agricultural Land ◽  
Subsurface Drainage ◽  
Agricultural Land Use ◽  
Carbon And Nitrogen

Effects of intermittency and land use on the in-stream phosphorus and organic carbon uptake

2020 ◽  
Author(s):  
Gabriele Weigelhofer ◽  
Matthias Pucher
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Hyporheic Zone ◽  
Agricultural Land ◽  
Headwater Streams ◽  
Phosphorus Release ◽  
Nutrient Concentrations ◽  
Agricultural Land Use ◽  
First Results

<p>Understanding the consequences of the interplay between land use and climate change is among the most pressing challenges of the 21<sup>st</sup> century for river managers. Over the past decades, agricultural land use has altered nutrient concentrations and stoichiometric ratios in stream ecosystems, thereby affecting aquatic biogeochemical cycles and the coupling among carbon, phosphorus, and nitrogen. In addition, the frequency and duration of droughts has increased dramatically across Europe, causing perennial streams to shift to intermittency and changing the capacity of sediments for the uptake and storage of macronutrients.</p><p>Our study aims to understand the effects of drying and re-wetting on the uptake, storage, and release of phosphorus and organic carbon from the benthic and the hyporheic zone of headwater streams under the additional stressor of agricultural land use. In specific, we are interested in the potential coupling and decoupling of phosphorus and dissolved organic carbon cycling in autotrophic and heterotrophic benthic biofilms. We sampled headwater streams before, during, and after the dry period in 2018 and 2019 and performed laboratory experiments with artificial drying and re-wetting and additions of dissolved organic carbon. We measured nutrient uptake and release, microbial biomass, respiration, and the activity of extra-cellular enzymes. The first results show an increased phosphorus release from the sediments immediately after re-wetting, foolowed by a reduced uptake capacity. The uptake of DOC was correlated with phosphorus in autotrophic biofilms, but not in heterotrophic ones.</p>

Effects of agricultural land use change on organic carbon and its labile fractions in the soil profile in an urban agricultural area

2019 ◽  
Vol 30 (15) ◽  
pp. 1875-1885 ◽  
Author(s):  
Youlin Luo ◽  
Qiquan Li ◽  
Jie Shen ◽  
Changquan Wang ◽  
Bing Li ◽  
...  
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Land Use Change ◽  
Soil Profile ◽  
Agricultural Land ◽  
Agricultural Area ◽  
Agricultural Land Use

Dissolved organic carbon and nitrogen in urban and rural watersheds of south-central Texas: land use and land management influences

2009 ◽  
Vol 96 (1-3) ◽  
pp. 119-129 ◽  
Author(s):  
J. A. Aitkenhead-Peterson ◽  
M. K. Steele ◽  
N. Nahar ◽  
K. Santhy
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Land Management ◽  
Carbon And Nitrogen ◽  
South Central ◽  
Central Texas

scholarly journals Assessment of Soil Quality under Different Agricultural Land Use Systems: A Case Study of the Ibadan Farm Settlement

2020 ◽  
pp. 89-104
Author(s):  
B. O. Adebo ◽  
A. O. Aweto ◽  
K. Ogedengbe
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Quality ◽  
Management Practices ◽  
Agricultural Land ◽  
Agricultural Land Use ◽  
Land Uses ◽  
Native Land ◽  
Land Use Systems

Soil quality in an agroecosytem is considerably influenced by land use and management practices. Twenty two potential soil quality indicators were used to assess the effects of five different land use types (arable land, plantation, agroforestry, marginal land and native forest) on soil quality in Akufo and Atan farm settlements in Ibadan, southwestern Nigeria. A total of sixty-two fields were selected from which soil samples were taken at a depth of 0-15 cm and subjected to laboratory analysis. Majority of the evaluated physicochemical properties varied significantly among the land uses and whereas native land performed relatively better for most of the observed attributes, arable and marginal lands performed worse. Due to the moderate to strong significant correlation among the potential indicators, they were subjected to principal component analysis and only seven indicators were selected to compute the soil quality index (SQI). In both Akufo and Atan, native land had the highest SQI (0.8250 and 0.860 respectively) which was significantly different (P = .05) from all the agricultural land uses, except plantation (0.739 and 0.750 respectively). Whereas marginal field in Atan was most degraded (SQI = 0.455), it was closely followed by arable fields in both locations. This study indicates that the current agricultural land use and soil management practices in Akufo and Atan farm settlements have negatively impacted soil quality; however, the degree of degradation was strongly influenced by the concentration of soil organic carbon in the understudied land use systems. It also emphasizes the need to promote the use of sustainable management practices among agricultural land users, so as to increase soil organic carbon stock, and improve soil quality and land productivity.

Dissolved Organic Carbon and Estrogen Transport in Surface Runoff From Agricultural Land Receiving Poultry Litter1

2012 ◽  
Vol 48 (3) ◽  
pp. 558-569 ◽  
Author(s):  
Sudarshan Dutta ◽  
Shreeram Inamdar ◽  
Jerry Tso ◽  
Diana S. Aga ◽  
J. Tom Sims
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Surface Runoff ◽  
Agricultural Land

Soil organic carbon changes as influenced by agricultural land use and management: a case study in Yanhuai Basin, Beijing, China

2006 ◽  
Vol 26 (10) ◽  
pp. 3198-3203 ◽  
Author(s):  
Xinyu Zhang ◽  
Liding Chen ◽  
Bojie Fu ◽  
Qi Li ◽  
Xin Qi ◽  
...  
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Agricultural Land ◽  
Agricultural Land Use ◽  
Land Use And Management ◽  
Beijing China

The effect of land use on dissolved organic carbon and nitrogen uptake in streams

2009 ◽  
Vol 54 (11) ◽  
pp. 2335-2350 ◽  
Author(s):  
LAURA T. JOHNSON ◽  
JENNIFER L. TANK ◽  
CLAY P. ARANGO
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Nitrogen Uptake ◽  
Carbon And Nitrogen
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