Chemical transformation , nutrient release and changes in the energy content of decomposing rape, sunflower and soybean residues confined in buried fiberglass bags were assessed in a laboratory study during a 340-day incubation period. The organic C decreased by about 70% while total N, after initial decay, remained almost constant for each type of residue. The NHj~-N was progressively oxidized and, consequently, the NOJ-N increased. The C/N ratio narrowed with loss of C. Hemicellulose, cellulose and lignin decreased with different trends for each crop residue. The energy content, was reduced to about 25% in rape, 30% in sunflower and 20% in soybean residues. Total P, K, Ca and Mg contents decreased for each type of residue. The results suggest that the three residues could improve the nutrient pool of the soil.
|Autori:||Scagnozzi A.; Levi-Minzi R.; Saviozzi A.; Riffaldi R.|
|Titolo:||Soil properties as influenced by incorporation of crop residues|
|Anno del prodotto:||1996|
|Appare nelle tipologie:||1.1 Articolo in rivista|