Simulating crop response to Nitrogen-deficiency stress using the critical Nitrogen concentration concept and the AquaCrop semi-quantitative approach
| Autor: | Teymour Sohrabi, Hadisseh Rahimikhoob, Mojtaba Delshad |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Nitrogen deficiency Simulation modeling Greenhouse Biomass Agricultural engineering Horticulture engineering.material 01 natural sciences Crop 03 medical and health sciences 030104 developmental biology Nutrient engineering Production (economics) Environmental science Fertilizer 010606 plant biology & botany |
| Zdroj: | Scientia Horticulturae. 285:110194 |
| ISSN: | 0304-4238 |
| Popis: | Simulation models are effective tools for evaluation of alternative management options. These models have been applied to address the impact of diverse environmental and management conditions on crop production. Nitrogen (N) is considered as the major nutrient influencing crop quality and quantity. In greenhouse cultivation, where both crops quality and quantity are important, application of a mathematical model which integrates different crop growth processes, is crucial. AquaCrop model employs a semi-quantitative approach for estimation of crop biomass under N-deficiency conditions. In AquaCrop model, the effect of soil N fertility stress on biomass production is simulated indirectly based on stress coefficients. However, proper fertilizer management requires the knowledge of crop N demand during growth period to ensure maximum production. In this respect, a direct simulation approach based on the concept of critical N concentration was employed. Two experiments with different N application rates were conducted on basil grown under greenhouse conditions. The AquaCrop model was initially parameterized for basil and then calibrated under N stress conditions. Validation results indicated an acceptable accuracy (17.20 % |
| Databáze: | OpenAIRE |
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