Nutrient Diagnosis Norms for Date Palm (<i>Phoenix dactylifera</i> L.) in Tunisian Oases
Several studies have pointed out the promising use of nutritional diagnosis methods for the determination of optimum nutrient contents in plant tissues. The present investigation was carried out in different oases in Southern Tunisia to determine reference values for the interpretation of leaf analy...
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MDPI AG
2020-06-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/10/6/886 |
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| author | Mouna Bendaly Labaied Lotfi Khiari Jacques Gallichand Fassil Kebede Nabila Kadri Nouha Ben Ammar Foued Ben Hmida Mehdi Ben Mimoun |
| author_facet | Mouna Bendaly Labaied Lotfi Khiari Jacques Gallichand Fassil Kebede Nabila Kadri Nouha Ben Ammar Foued Ben Hmida Mehdi Ben Mimoun |
| author_sort | Mouna Bendaly Labaied |
| collection | DOAJ |
| description | Several studies have pointed out the promising use of nutritional diagnosis methods for the determination of optimum nutrient contents in plant tissues. The present investigation was carried out in different oases in Southern Tunisia to determine reference values for the interpretation of leaf analyses of date palm (<i>Phoenix dactylifera</i>) Deglet Nour cultivar with the Critical Value Approach (CVA) and the Compositional Nutrient Diagnosis (CND). A database (<i>n</i> = 100) of yield and mineral concentrations taken from date palm leaflets in October, at the maturity stage of dates, was used. The yield cut-off between low-yield and high-yield subpopulations, selected from cumulative variance ratio functions across survey data, was 76 kg palm<sup>−1</sup> and the global nutrient imbalance index (CNDr<sup>2</sup>) was 10.06. Critical CND nutrient indices were found to be symmetrical around zero as follows: (1.59; +1.59) for I<sub>N</sub>, (−0.44, +0.44) for I<sub>P</sub>, (−0.63, +0.63) for I<sub>K</sub>, (−0.94, +0.94) for I<sub>Ca</sub>, (−1.05, +1.05) for I<sub>Mg</sub>, (−0.80, +0.80) for I<sub>Fe</sub>, (−0.74, +0.74) for I<sub>Cu</sub>, (−0.80, +0.80) for I<sub>B</sub>, (−0.93, +0.93) for I<sub>Zn</sub>, (−1.04, +1.04) for I<sub>Mn</sub>, and (−1.03, +1.03) for the residual value. Compared to CND, the CVA approach shows weak detection of the nutrients that cause nutritional imbalance. CND indices revealed, except for N, the presence of nutrient imbalances and the necessity to correct the mineral nutrition of date palm in the Kebeli oases. |
| first_indexed | 2024-03-10T18:59:30Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T18:59:30Z |
| publishDate | 2020-06-01 |
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| series | Agronomy |
| spelling | doaj.art-ada87d6be69a47189cc787ad7e0c035d2023-11-20T04:31:38ZengMDPI AGAgronomy2073-43952020-06-0110688610.3390/agronomy10060886Nutrient Diagnosis Norms for Date Palm (<i>Phoenix dactylifera</i> L.) in Tunisian OasesMouna Bendaly Labaied0Lotfi Khiari1Jacques Gallichand2Fassil Kebede3Nabila Kadri4Nouha Ben Ammar5Foued Ben Hmida6Mehdi Ben Mimoun7Green Team Laboratory, Institut National Agronomique de Tunisie, Université de Carthage, LR17AGR01, Tunis 1082, TunisiaDepartment of Soils and Agrifood Engineering, Faculty of Agriculture and Food Sciences, Paul-Comtois Building. 2425, Rue de l’Agriculture, Laval University, Quebec, QC G1A 0A6, CanadaDepartment of Soils and Agrifood Engineering, Faculty of Agriculture and Food Sciences, Paul-Comtois Building. 2425, Rue de l’Agriculture, Laval University, Quebec, QC G1A 0A6, CanadaSoil and Fertilizer Research in Africa, Mohammed VI Polytechnic University, Ben Guerir 43150, MoroccoGreen Team Laboratory, Institut National Agronomique de Tunisie, Université de Carthage, LR17AGR01, Tunis 1082, TunisiaDates Technical Center, Route Gabes, Kebeli 4280, TunisiaDates Technical Center, Route Gabes, Kebeli 4280, TunisiaGreen Team Laboratory, Institut National Agronomique de Tunisie, Université de Carthage, LR17AGR01, Tunis 1082, TunisiaSeveral studies have pointed out the promising use of nutritional diagnosis methods for the determination of optimum nutrient contents in plant tissues. The present investigation was carried out in different oases in Southern Tunisia to determine reference values for the interpretation of leaf analyses of date palm (<i>Phoenix dactylifera</i>) Deglet Nour cultivar with the Critical Value Approach (CVA) and the Compositional Nutrient Diagnosis (CND). A database (<i>n</i> = 100) of yield and mineral concentrations taken from date palm leaflets in October, at the maturity stage of dates, was used. The yield cut-off between low-yield and high-yield subpopulations, selected from cumulative variance ratio functions across survey data, was 76 kg palm<sup>−1</sup> and the global nutrient imbalance index (CNDr<sup>2</sup>) was 10.06. Critical CND nutrient indices were found to be symmetrical around zero as follows: (1.59; +1.59) for I<sub>N</sub>, (−0.44, +0.44) for I<sub>P</sub>, (−0.63, +0.63) for I<sub>K</sub>, (−0.94, +0.94) for I<sub>Ca</sub>, (−1.05, +1.05) for I<sub>Mg</sub>, (−0.80, +0.80) for I<sub>Fe</sub>, (−0.74, +0.74) for I<sub>Cu</sub>, (−0.80, +0.80) for I<sub>B</sub>, (−0.93, +0.93) for I<sub>Zn</sub>, (−1.04, +1.04) for I<sub>Mn</sub>, and (−1.03, +1.03) for the residual value. Compared to CND, the CVA approach shows weak detection of the nutrients that cause nutritional imbalance. CND indices revealed, except for N, the presence of nutrient imbalances and the necessity to correct the mineral nutrition of date palm in the Kebeli oases.https://www.mdpi.com/2073-4395/10/6/886foliar diagnosisCND: compositional nutrient diagnosisCVA: critical value approachselecting high-yield subpopulationcritical nutrient indices |
| spellingShingle | Mouna Bendaly Labaied Lotfi Khiari Jacques Gallichand Fassil Kebede Nabila Kadri Nouha Ben Ammar Foued Ben Hmida Mehdi Ben Mimoun Nutrient Diagnosis Norms for Date Palm (<i>Phoenix dactylifera</i> L.) in Tunisian Oases Agronomy foliar diagnosis CND: compositional nutrient diagnosis CVA: critical value approach selecting high-yield subpopulation critical nutrient indices |
| title | Nutrient Diagnosis Norms for Date Palm (<i>Phoenix dactylifera</i> L.) in Tunisian Oases |
| title_full | Nutrient Diagnosis Norms for Date Palm (<i>Phoenix dactylifera</i> L.) in Tunisian Oases |
| title_fullStr | Nutrient Diagnosis Norms for Date Palm (<i>Phoenix dactylifera</i> L.) in Tunisian Oases |
| title_full_unstemmed | Nutrient Diagnosis Norms for Date Palm (<i>Phoenix dactylifera</i> L.) in Tunisian Oases |
| title_short | Nutrient Diagnosis Norms for Date Palm (<i>Phoenix dactylifera</i> L.) in Tunisian Oases |
| title_sort | nutrient diagnosis norms for date palm i phoenix dactylifera i l in tunisian oases |
| topic | foliar diagnosis CND: compositional nutrient diagnosis CVA: critical value approach selecting high-yield subpopulation critical nutrient indices |
| url | https://www.mdpi.com/2073-4395/10/6/886 |
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