| Autor: |
A. Van Herck, L. O. Fiems, Gpj Janssens, Annelies Mulier, G. Van Huylenbroeck, Ignace Verbruggen, G. De Groote, E. Baecke, Georges Hofman, O. Van Cleemput, Lucien Carlier, R. De Wilde, D. De Brabander |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
European Journal of Agronomy. 20:45-51 |
| ISSN: |
1161-0301 |
| Popis: |
Since the early 1990s, Flemish agriculture has been confronted with serious nutrient problems. Recently, the Flemish Government started encouraging farmers to take responsibility for the manure problem. This was done by giving them the choice between a manure administration system, based on fixed standards, or a nutrient balance system. In this project a methodology for the composition of nutrient balances at farm level in Flanders was developed. This methodology defines input–output models for the different sectors (cattle, pigs and poultry) and fixes rules on how to determine quantities and nutrient contents for several products. In addition, nutrient flows were followed during 1 year on 40 Flemish farms in different sectors and a mineral balance was calculated for each of them. Four major restrictions to the accurate calculation of farm level nutrient balances were identified: (1) the wide variability that is allowed between actual and reported nutrient composition of concentrated feed; (2) the estimates of the amount and composition of manure; (3) the assessment of changes in standing stock on the farm between the beginning and end of the reporting period and (4) the accuracy of the data supplied by the farmers. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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