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Título

Plant analysis interpretation based on a new index: Deviation from optimum percentage (DOP)

AutorMontañés García, Luis ; Heras Cobo, Luis ; Abadía Bayona, Javier ; Sanz Encinas, Manuel
CitaciónJournal of Plant Nutrition 16 (7): 1289-1308 (1993)
ResumenThe objective of the present work is to introduce a new index (DOP: Deviation from Optimum Percentage), as an alternative methodology for plant mineral analysis interpretation. The DOP index is calculated for each of the analyzed elements by applying the following general formula: DOP = [(C x 100yCref] ‐ 100, where C is the nutrient concentration in the sample to assess and Cref is the optimal nutrient concentration used as a reference value. The calculations used to obtain the DOP index can be easily implemented in a microcomputer. An optimum nutritional situation for any element is defined by a DOP index equal to zero. The DOP index permits to know the nutrient limitation order in a given sample, giving information similar to that obtained with the DRIS method. Furthermore, the DOP indexes indicate wether a element is in defect (negative indexes) or excess (positive indexes). For comparison, the DOP index has been applied, together with other traditional methods including the DRIS approach, to a new nutrient database from a peach tree study and to other available databases from the scientific literature. Other examples are shown indicating the different behavior of DRIS and DOP method when nutrient contents change.
Descripción20 Pags.
Versión del editorhttp://dx.doi.org/10.1080/01904169309364613
URIhttp://hdl.handle.net/10261/121960
DOI10.1080/01904169309364613
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