Descomposition of crop residues under no-till management : Wheat, corn, soybeans and wheat after corn or soybeans
The rate of decomposition of corn, wheat and soybean residues located on the soil surface and its modification through the crop sequence (soybean-wheat and corn-wheat) was studied. Dry weight and N concentration during 248 days was determined. The rate of decomposition of the soybean stubble was significantly higher than corn and wheat stubble (p<0,05). As a result of an increase in the amount of N immobilized the N concentration increased with time in corn and wheat. In soybean the N concentration and the dry weight were proportionally reduced and the amount of immobilized N in the stubble descended throughout the period. The wheat straw decomposition on soybean stubble was faster than on corn stubble. Difference in the amount of immobilized N did not exist on soybean or maize stubble but the time of N immobilization was significantly lower on soybean residue (p<0,05).
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA)
2002
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| Online Access: | https://agrocienciauruguay.uy/index.php/agrociencia/article/view/1352 |
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