Variation of soil organic carbon, nitrogen, and phosphorus stoichiometry and biogeographic factors across the desert ecosystem of Hexi Corridor, northwestern China

2018 ◽  
Vol 19 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Ke Zhang ◽  
Yongzhong Su ◽  
Rong Yang
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Hexi Corridor ◽  
Northwestern China ◽  
Desert Ecosystem ◽  
Nitrogen And Phosphorus

Spatial variations in soil organic carbon, nitrogen and phosphorus concentrations related to stand characteristics in subtropical areas

2016 ◽  
Vol 413 (1-2) ◽  
pp. 289-301 ◽  
Author(s):  
Fang Jiang ◽  
Xiaohong Wu ◽  
Wenhua Xiang ◽  
Xi Fang ◽  
Yeling Zeng ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Spatial Variations ◽  
Nitrogen And Phosphorus ◽  
Stand Characteristics

scholarly journals Changes in the stocks of soil organic carbon, total nitrogen and phosphorus following afforestation of post-arable soils: A chronosequence study

2019 ◽  
Vol 451 ◽  
pp. 117536 ◽  
Author(s):  
Halina Smal ◽  
Sławomir Ligęza ◽  
Jacek Pranagal ◽  
Danuta Urban ◽  
Dorota Pietruczyk-Popławska
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Total Nitrogen ◽  
Arable Soils ◽  
Nitrogen And Phosphorus

scholarly journals World's soils are under threat

SOIL ◽  
2016 ◽  
Vol 2 (1) ◽  
pp. 79-82 ◽  
Author(s):  
Luca Montanarella ◽  
Daniel Jon Pennock ◽  
Neil McKenzie ◽  
Mohamed Badraoui ◽  
Victor Chude ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Crop Yields ◽  
Tropical Soils ◽  
Policy Formulation ◽  
Nitrogen And Phosphorus ◽  
Developing Regions ◽  
Soil Resources ◽  
National Governments ◽  
Carbon Stores

Abstract. The Intergovernmental Technical Panel on Soils has completed the first State of the World's Soil Resources Report. Globally soil erosion was identified as the gravest threat, leading to deteriorating water quality in developed regions and to lowering of crop yields in many developing regions. We need to increase nitrogen and phosphorus fertilizer use in infertile tropical and semi-tropical soils – the regions where the most food insecurity among us are found – while reducing global use of these products overall. Stores of soil organic carbon are critical in the global carbon balance, and national governments must set specific targets to stabilize or ideally increase soil organic carbon stores. Finally the quality of soil information available for policy formulation must be improved – the regional assessments in the State of the World's Soil Resources Report frequently base their evaluations on studies from the 1990s based on observations made in the 1980s or earlier.

scholarly journals Jena Soil Model: a microbial soil organic carbon model integrated with nitrogen and phosphorus processes

2019 ◽  
Author(s):  
Lin Yu ◽  
Bernhard Ahrens ◽  
Thomas Wutzler ◽  
Marion Schrumpf ◽  
Sönke Zaehle
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Profile ◽  
Model Performance ◽  
Nutrient Release ◽  
Co2 Concentration ◽  
Beech Forest ◽  
Forest Site ◽  
Nitrogen And Phosphorus ◽  
Soil Model

Abstract. The plant-soil interactions in a changing environment, such as the response of soil organic matter (SOM) decomposition, nutrient release, and plant uptake to elevated CO2 concentration, is essential to understand the global carbon (C) cycling and predict potential future climate feedbacks. These processes are poorly represented in current terrestrial biosphere models (TBMs) due to the simple linear approach of SOM cycling and the ignorance of variation within the soil profile. While the emerging microbially-explicit soil organic carbon models can better describe C formation and turnover processes, they lack so far a coupling to nutrient cycles. Here we present a new SOM model, JSM (Jena Soil Model), which is microbially-explicit, vertically resolved, and integrated with nitrogen (N) and phosphorus (P) cycle processes. JSM includes a representation of enzyme allocation to different depolymerisation sources based on the microbial adaptation approach, and a representation of nutrient acquisition competition based on the equilibrium chemistry approximation (ECA) approach. We present the model structure and basic features of the model performance against a German beech forest site. The model is capable of reproducing the main SOM stocks, microbial biomass, and their vertical patterns of the soil profile. We further test the model sensitivity to its parameterisation and show that JSM is generally sensitive to the change of microbial stoichiometry and microbial processes.

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