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Soil degradation has seriously threatened global soil and food security. Biochar application is a promising management option to remediate the degraded soils. However, extensive application of biochar is limited by lack of understanding the effects of biochar on nitrogen (N) mineralization in the degraded coastal wetland soils. Therefore, the individual or combined effects of biochar, reed stem and...
Interest in the use of biochar to improve soil productivity has rapidly increased. Nitrogen (N) loss, retention and bioavailability in biochar-amended soils fertilized with NH 4+ –N and NO 3− –N were studied using leaching and pot experiments. NO 3− –N leaching from the soils fertilized with NH 4+ –N and NO 3− –N was significantly reduced...
Although microporosity and surface area of natural organic matter (NOM) are crucial to mechanistic evaluation of the sorption process for nonpolar organic contaminants (NOCs), they have wrongly been estimated by the N 2 adsorption technique. Nuclear magnetic resonance spectroscopy ( 13 C NMR), and benzene, carbon dioxide, and nitrogen adsorption techniques were used to characterize...
Sorption of hydrophobic organic compounds (HOCs) is an important process for determining their fate and transport in soils and sediments. Soil/Sediment organic matter (SOM) is believed to be the dominant sorbent but the mechanisms are not thoroughly understood. In this study, we examined the sorption of phenanthrene, naphthalene and o-xylene by a mineral soil, its base-extracted soil (BE), humic acid...
Increasing industrial development and rapid urbanization affects adversely the paddy regions of China in terms of environmental pollution. Soil organic matter is one of the major components, which influence the contaminants mobility in soils. Fulvic acid is one of the major fractions of the soil organic matter of the paddy soils. It is imperative to separate fulvic acids (FA) to different fractions...
Characterization of soil organic matter (SOM) is important for determining the overall quality of soils, and cover crop system may change SOM characteristics. The purpose of this study was to examine the effect of cover crops on the chemical and structural composition of SOM. We isolated humic substances (HS) from soils with the following cover crop treatments: (a) vetch (Vicia Villosa Roth.)/rye...
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