Nutritional diagnosis norms for three olive tree cultivars in superhigh-density orchards

Giménez, Miguel; Nieves, Manuel; Gimeno, Helenio; Tomé, Juan Martínez; Nicolás, Juan José Martínez

doi:10.7764/ijanr.v48i1.2227

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…For PC3 the variables Ca and Mn had the same direction of change and opposite to that obtained by Mg (Ca+Mg-Mn+). The main element in chlorophyll structure is Mg. Plant productivity is reduced when Ca and Mg levels within leaf tissues are insufficient [42] .…”

Section: Principal Component Analysis (Pca)mentioning

confidence: 99%

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DRIS formulas and PCA approach for evaluation of the nutritional status of walnut trees in the Hawraman area

Maulood

2024

PJBAS

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It is essential to understand the proper nutrient levels for obtaining the highest yield when analyzing the foliar composition of walnut leaves using DRIS techniques that consider the interaction between nutrients. The study aims to identify the nutritional deficiencies in walnut orchards responsible for low production by analyzing the data using DRIS and PCA methods. Measured nine elements in the walnut tree leaf: N, P, K, Ca, Mg, and microelements Fe, Zn, Cu, and Mn. Used the Diagnosis and Recommendation Integrated System (DRIS) to assess nutrient status in the leaf, detect deficits or imbalances, and make specific recommendations for optimal growth. Along with Principal component analysis, diagnose deficient nutrients and deal with problems. In the present work, 42 samples of walnut leaves were analyzed and collected from the walnut orchard at the Balkha/Hawraman, located at 35°11'59.0"N 46°08'59.1"E, altitude 695 m.a.s.l. A high-yielding population of walnut trees forms up 71.4% of the total, while a low-yielding population makes up the remaining 28.6%. Results showed that the most deficient nutrients ascendingly were: Fe>Cu> Zn>Mn>N=Ca>K>P>Mg. The PCA results show that the DRIS index and the low-and high-yield subgroups' nutrient concentrations were represented by 78.8%, 87.2%, and 93.5%, respectively of the total variance. From previous results and field observation, the walnut orchards need more attention and studies in other aspects to fulfill knowledge about soil quality index, climatic changes, and diseases related to these precious trees to make decisions for best monitoring and management.

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Section: Principal Component Analysis (Pca)mentioning

confidence: 99%

“…Insufficient calcium can result in poor fruit quality, weakened cell walls, and impaired defensive mechanisms [42] . On the other hand, P, and K had negatively loaded in the PC4 and opposite positive directions of changes were obtained with Ca and Fe.…”

Section: Nutrientsmentioning

confidence: 99%

DRIS formulas and PCA approach for evaluation of the nutritional status of walnut trees in the Hawraman area

Maulood

2024

PJBAS

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“…The DRIS calculation methodology was applied, as described by diverse authors [14], to obtain the DRIS reference standards for the macronutrients, for each cultivar and watering regime studied. For each nutrient, the arithmetic mean, standard deviation and the coefficient of variability were used in the sampling period in which these were stable.…”

Section: Acquisition Of the Dris Standardsmentioning

confidence: 99%

Creating Foliar Diagnosis Rules for Almond Trees (Prunus dulcis, Mill.) Grown Under Different Watering Regimes: Irrigation vs Rainfed

Ferrández-Cámara¹,

Martínez-Nicolás²,

Zapata³

et al. 2021

Statistical Inference for Ergodic Algorithmic Model (EAM), Applied to Hydrophobic Hydration Processes

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Agriculture in the 21st Century must be performed considering sustainability criteria to mitigate the effects of climate change. For this, adequate fertilization is necessary for avoiding the excess application of fertilizers, which could contaminate the environment. For the efficient management of fertilization, it is necessary to know the optimum levels of each nutrient for each specie and type of environment. The most common method is to interpret foliar analyses results with traditional tools such as the Range of Normality (RN) or through more precise and complex techniques, such as the Diagnosis and Recommendation Integrated System (DRIS), or the Compositional Nutrient Diagnosis (CND). However, for almonds, little information is available on the nutritional requirements of the different varieties, and those cultivated in rainfed vs irrigated lands are not differentiated. In the present work, 384 samples from each of four almond varieties (Prunus dulcis, Mill.) Desmayo, Ramillete, Marcona and Tuono, grown in rainfed or irrigated lands (a total of 1,536 samples) were analyzed, corresponding to sampling every two weeks between the months of June and September, both months included, for a period of two consecutive years. The main objective of the work was to establish RN, DRIS and CND standards for the interpretation of the nutritional analysis of these four almond varieties grown under different watering regimes. With the data from mineral analysis, through the application of different mathematical and statistical models, the RN, DRIS, and CND standards were obtained, with the conclusion that the optimal period for sampling this crop was in the month of July. These standards could be useful for developing algorithms that could be utilized to develop decision support systems (DSS) that interpret the foliar analyses more precisely as compared to the simple RN, and which manage, based on this information, the fertilization of the crops.

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Improving Nutrients Uptake and Productivity of Stressed Olive Trees with Mono-Ammonium Phosphate and Urea Phosphate Application

Awad

Beheiry

2022

Agronomy

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Nutritional status improvement is a surrogate approach to overcoming undesirable soil conditions. This study was performed in sandy clay loam soil that was characterized by certain undesirable parameters (ECe = 6.4 vs. 7.2 dS m−1, CaCO3 = 8.8 vs. 9.2%, and pH = 7.78 vs. 7.89) on olive (Olea europaea, Arbequina cv.) in the 2020 and 2021 seasons to investigate the influence of two highly soluble phosphorus fertilizers, mono-ammonium phosphate (MAP) and urea phosphate (UP). The treatments included 0.336, 0.445, and 0.555 kg tree−1 for MAP1, MAP2, and MAP3 and 0.465, 0.616, and 0.770 kg tree−1 for UP1, UP2, and UP3, respectively, in comparison to granular calcium super-phosphate (GCSP) at the recommended rate (0.272 kg P2O5 equal 1.75 kg tree−1). This experiment was established according to a randomized complete block design. Generally, our results indicated that both MAP and UP applications surpassed GCSP for all studied parameters except leaf copper uptake in the 2021 season. Moreover, among the HSPFs applied, it was found that applying the maximum levels gave the best results. However, MAP3 gave the maximum values for shoot length, SPAD reading, and dry fruit matter. Moreover, UP3 produced the best results for the leaf area, olive tree yield, total olive yield, total fresh weight, flesh weight (FlW), fruit length (FrL), and leaf Fe content in both seasons.

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Nutritional diagnosis norms for three olive tree cultivars in superhigh-density orchards

Cited by 4 publications

References 10 publications

DRIS formulas and PCA approach for evaluation of the nutritional status of walnut trees in the Hawraman area

DRIS formulas and PCA approach for evaluation of the nutritional status of walnut trees in the Hawraman area

Creating Foliar Diagnosis Rules for Almond Trees (Prunus dulcis, Mill.) Grown Under Different Watering Regimes: Irrigation vs Rainfed

Improving Nutrients Uptake and Productivity of Stressed Olive Trees with Mono-Ammonium Phosphate and Urea Phosphate Application

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