Diagnosis and recommendation integrated systems (dris): an alternative for interpretation of results of foliar analysis in coffee
Diagnosis and Recommendation Integrated Systems (DRIS) norms were developed for the interpretation of N, P, K, Ca, Mg, Mn, Fe and B contents of coffee (Coffea arabica L.) leaves, obtained from a N-P-K factorial experiment at two different locations of the Colombian Coffee Zone. For diagnostic purposes of coffee nutrition this is the first time a DRIS norm is derived. The DRIS approach allows a betterinterpretation of Coffee's leaf mineral contents than tables of "normal values" since it shows the dynamics of change ofcomposition of the plant as result of fertlllzer treatments and also lists all nutrients in order of requirement by the plant, for.example, K>P>Ca>B>N>Mn>Fe for both localitles. This was not clearly sho~n by the table of "normal values". DRIS also showed that calcium is not balanced as yield in. creased as result of fertilizar applications thus suggesting calcium may be a limiting factor for further yield increases. DRIS interpretation of leaf analysis was very similar for all sampling dates but for may samplings a highly significant correlationbetween the sum of absolute ORIS valuesand yield was found. ORIS might be a very useful tool for the interpretation of coffee leaf analysis.
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias Agrarias
1988
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| Online Access: | https://revistas.unal.edu.co/index.php/agrocol/article/view/20933 |
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