Adjusting Crop Fertilization Levels Based on Previous Crop and Intercropping
1. Presentation
Characterization of the technique
Description of the technique:
| François Dumoulin | CA 60 | francois.dumoulin(at)agri60.fr | Fresnoy le Luat (60) |
|---|---|---|---|
| Marie-Hélène Jeuffroy | INRA | marie-helene.jeuffroy(at)grignon.inra.fr | Grignon (78) |
| Rémy Ballot | INRA | remy.ballot(at)grignon.inra.fr | Grignon (78) |
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Define a forecast nitrogen fertilization dose by the balance method taking into account the returns from the previous crop and intercrop.
Example of implementation:
When calculating the forecast dose of nitrogen for a crop, default reference values can be used to integrate the effect of the previous crop; from -20 units for a cereal straw previous crop to +20 units for a protein crop previous or +30 units for a alfalfa previous crop. The effect of intermediate crops can also be significant: up to 60 to 80 units returned by a cover crop of legumes.
Implementation period On established crop
Spatial scale of implementation Plot
Application of the technique to...
All crops: Easily generalizable
Provided reliable references on returns are available.
All soil types: Generalization sometimes tricky
The established references have not always been validated in some atypical soil types where reasoning is by extrapolation.
All climatic contexts: Easily generalizable
Taking into account the returns from the previous crop and intercrop occurs when defining a forecast dose. Taking into account the climatic specificities of the year occurs later in fertilization management.
Regulation
2. Services provided by the technique
3. Effects on the sustainability of the cropping system
"Environmental" criteria
Effect on air quality: Increasing
GHG emissions: DECREASE
Effect on water quality: Increasing
N.P.: DECREASE
Effect on fossil resource consumption: Decreasing
Fossil energy consumption: DECREASE
Other: No effect (neutral)
Air: Taking into account the previous crop in the calculation of the forecast dose helps limit greenhouse gas emissions linked to the manufacture of mineral fertilizers applied in excess and field emissions of nitrous oxide.
Water: Taking into account the previous crop in the calculation of the forecast dose helps limit the risks of over-fertilization, and thus the risks of nitrogen transfer to water by leaching.
Fossil energy: Taking into account the previous crop in the calculation of the forecast dose helps limit fossil energy consumption linked to the manufacture of mineral fertilizers applied in excess.
"Agronomic" criteria
Productivity: No effect (neutral)
In the case of previous crops whose residue return causes nitrogen mobilization, taking these elements into account in the forecast dose calculation helps limit risks of yield or quality losses due to nitrogen deficiency.
Soil fertility: No effect (neutral)
Water stress: Decreasing
Excess fertilization that maintains a large vegetative mass beyond what is necessary tends to sensitize cereals to water stress.
Functional Biodiversity: No effect (neutral)
Other agronomic criteria: Decreasing
Risk of diseases, lodging, insects: Decrease
Adjusting nitrogen fertilization by integrating the effect of the previous crop and intercrop helps reduce risks of diseases, lodging and insects linked to excessive fertilization.
"Economic" criteria
Operational costs: Variable
Taking into account the previous crop can lead to increasing or decreasing the forecast dose, thus fertilization costs.
Mechanization costs: No effect (neutral)
Margin: Increasing
Taking into account the previous crop helps maximize the economic efficiency of nitrogen fertilization, thus improving crop margin.
Other economic criteria: No effect (neutral)
Fuel consumption: no effect (neutral)
"Social" criteria
Working time: No effect (neutral)
Observation time: No effect (neutral)
4. Organisms favored or disadvantaged
Favored Pests
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Disadvantaged pests
| Organism | Impact of the technique | Type | Details |
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Favored Auxiliaries
| Organism | Impact of the technique | Type | Details |
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Disadvantaged Auxiliaries
| Organism | Impact of the technique | Type | Details |
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Favored climatic and physiological accidents
| Organism | Impact of the technique | Details |
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Disadvantaged climatic and physiological accidents
| Organism | Impact of the technique | Details |
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5. For further information
- Nitrogen fertilization calculation - Methodological guide for establishing local prescriptions
- -Comifer
Technical brochure, 2011
- Catch crops - Legumes to supply nitrogen to the following corn
- -Cohan J.P., Pauget J. (Arvalis)
Perspectives agricoles n°380, p44-48, Press article, 2011
- Nitrogen availability from previous legume, catch crop and organic fertilizer
- -Prieur L. (CREAB), Justes E. (INRA)
AlterAgri n°80, p13-17, Press article, 2006
6. Keywords
Pest control method:
Mode of action:
Type of strategy regarding pesticide use:
