Pedosphere 4(3): 209--215, 1994
ISSN 1002-0160/CN 32-1315/P
©1994 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Soil properties as influenced by incorporation of crop residnes |
| A. SCAGNOZZI, R. LEVI-MINZI, A. SAVIOZZI and R. RIFFALDI |
| Instttute of Agricultural Chemistry, University of Pisa, Via S. Michele degli Scalzi 2, 56124 Pisa (Italy) |
| ABSTRACT |
| 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 NH4+-N was progressively oxidized and, consequently, the NO3--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. |
| Key Words: bags, crop residues, organic matter decomposition, soil properties |
| Citation: Scagnozzi, A., Levi-minzi, R., Saviozzi, A. and Riffaldi, R. 1994. Soil properties as influenced by incorporation of crop residnes. Pedosphere. 4(3): 209-215. |
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