Abstract
ABSTRACT: Crop residues decomposition are controlled by chemical tissue components. This study evaluated changes on plant tissue components, separated by the Van Soest partitioning method, during cover crop decomposition. The Van Soest soluble fraction was the first to be released from the crop residues, followed by cellulose and hemicellulose. Lignin was the crop residue component that suffered the least degradation, and for certain crop residue types, lignin degradation was not detected. The degradation of the main components of crop residues (soluble fraction, cellulose, hemicellulose and lignin) is determined by the chemical and structural composition of each fraction.
Highlights
Studies that evaluated the degradation of different crop residue components, especially under field conditions, are scarce
This study evaluated the degradation dynamics of the soluble fraction, cellulose, hemicellulose and lignin of different summer cover crops residue undergoing decomposition at the soil surface
The degradation of cellulose from the crop residues differed among species throughout the evaluation period, being the highest and lowest remaining cellulose percentages at 140 days observed on pearl millet (54%) and jack bean (23%) crop residues, respectively
Summary
Studies that evaluated the degradation of different crop residue components, especially under field conditions, are scarce. This study evaluated the degradation dynamics of the soluble fraction, cellulose, hemicellulose and lignin of different summer cover crops residue undergoing decomposition at the soil surface.
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