scholarly journals Incorporation of nitrogen from crop residues into light-fraction organic matter in soils with contrasting management histories

2008 ◽  
Vol 45 (3) ◽  
pp. 281-287 ◽  
Author(s):  
Gary D. Bending ◽  
Mary K. Turner
Keyword(s):  
Organic Matter ◽  
Crop Residues ◽  
Light Fraction ◽  
Light Fraction Organic Matter

Characteristics of light fraction organic matter in surface soil of different altitude forests in Wuyi Mountain

2020 ◽  
Vol 40 (17) ◽  
Author(s):  
黄桥明，吕茂奎，聂阳意，任寅榜，熊小玲，谢锦升 HUANG Qiaoming
Keyword(s):  
Organic Matter ◽  
Surface Soil ◽  
Light Fraction ◽  
Light Fraction Organic Matter

Effects of light fraction organic matter removal on phosphate adsorption by lake sediments

2011 ◽  
Vol 26 (3) ◽  
pp. 286-292 ◽  
Author(s):  
Shengrui Wang ◽  
Wenli Yi ◽  
Suwen Yang ◽  
Xiangcan Jin ◽  
Guodong Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Lake Sediments ◽  
Light Fraction ◽  
Phosphate Adsorption ◽  
Organic Matter Removal ◽  
Light Fraction Organic Matter

scholarly journals Variation of soil organic matter depends on light-fraction organic matter under long-term monocropping of different crops  

2021 ◽  
Author(s):  
Futao Zhang ◽  
Yunfa Qiao ◽  
Xiaozeng Han ◽  
Bin Zhang
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Principal Component ◽  
Light Fraction ◽  
Bulk Soil ◽  
Density Fractions ◽  
Chemical Structures ◽  
Light Fraction Organic Matter ◽  
The Difference

Cultivating crops influences soil organic matter (SOM), but the effect of different crops remains unclear, particularly under long-term monocropping. The objective of this study was to identify how different crops influence the content and chemical structures of SOM under long-term monocropping. Here, soils were sampled (0–20 cm) under 27-year soybean and maize monocropping and separated into different physical fractions. The content and chemical structures of SOM in all fractions were determined. SOM contents were higher under soybean than maize in bulk soil and macroaggregates and their light-fractions instead of microaggregates and silt and clay. The difference in SOM chemical structure was observed in aggregates and density fractions rather than bulk soils and supported by the result of principal component analysis. The proportion of O-alkyl C in macro- and microaggregates and all free light fractions and that of aromatic C in mineral-associated fractions were higher, while that of carbonyl C was lower under maize than soybean. These results demonstrated that different crops monocropping influences the content and chemical structures of SOM, and the variations were mainly in the light-fraction SOM and highlight a higher sensitivity of physical fractions than bulk soil to different crops.  

scholarly journals Carbon, nitrogen and natural abundance of δ 13C e δ15N of light-fraction organic matter under no-tillage and crop-livestock integration systems

2012 ◽  
Vol 34 (4) ◽  
Author(s):  
Arcângelo Loss ◽  
Marcos Gervasio Pereira ◽  
Adriano Perin ◽  
Sidinei Julio Beutler ◽  
Lúcia Helena Cunha dos Anjos
Keyword(s):  
Organic Matter ◽  
Light Fraction ◽  
Natural Abundance ◽  
No Tillage ◽  
Δ 13C ◽  
Light Fraction Organic Matter
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