Soil Properties as influenced by incorporation of CropResidnesEnglish Full Text
A. SCAGNOZZI, R. LEVI-MINZI, A. SAVIOZZI and R. RIFFALDIInstttute 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 duringa 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 NH￣+4-N was progressively oxidized and, consequently,the NO￣-3N increased. The C/N ratio narrowed with loss of C. Hemicellulose, cellulose and lignin decreasedwith different trends for each crop residue. The energy content, was reduced to about 25% in rape, 30% insunflower 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.
- Series：
(D) Agriculture
- Subject：
Fundamental Science of Agriculture; Agronomy
- Classification Code：
S141
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