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Abstract

The Diagnostic Recommendation and Integrated System (DRIS) approach was used to identify mineral deficiencies associated with mango decline (a disorder of unknown etiology) of ‘Tommy Atkins’ mango (Mangifera indica L.) trees in the field. Nutrient deficiencies associated with decline were related to the nutrition of entire orchards and not to the nutrient status of individual trees within an orchard. The nutrient imbalance index (NII) was higher for trees in the orchards with the largest percentage of declined trees compared with the healthy orchard. The most deficient elements in orchards with declining trees according to DRIS were Mn, Fe, or a combination of both elements. The concentration of these elements was below the critical value in two of the three declined orchards sampled. Magnesium concentration was generally higher in declined orchards than in healthy orchards. Phosphorus had the most negative DRIS index, but the concentration was still above the critical value in an orchard that contained no declined trees. DRIS determinations from potted trees showing no mineral deficiency symptoms in a previous study also showed P to have the most negative DRIS index. DRIS, when used along with sufficiency ranges, appears to be a useful approach for identifying nutritional deficiencies involved in a mango decline.

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distribution in citrus under different acidic soil pH conditions. Our study aimed to determine the combined effects of low pH and B deficiency on the performance of ‘HB’ pummelo seedlings, including plant growth, gas exchange, and mineral nutrient accumulation

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resulting in nutrient deficiency. The differences in the absorption of minerals between 2014 and 2015 could be due to different temperatures: in 2014, the temperature was an average 5 °C lower, especially early in the season, than in 2015. For example, the

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potential contributions of the accessions to alleviate vitamin A and mineral deficiencies in the EA region. Materials and Methods Ninety sweetpotato accessions were used in this study ( Table 1 ). All varieties were farmer varieties from EA, except the

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growth reduction, no visual symptoms of nutritional deficiencies were observed. Table 4. Cardoon morphological parameters at the end of the experiment (mean values ± sd , n = 3). The mineral composition of cynara tissues and the effects of saline

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translocation from leaves Photosynthetica 39 197 203 Römheld, V. 2012 Diagnosis of deficiency and toxicity of nutrients, p. 299–312. In: P. Marschner (ed.). Marschner’s Mineral Nutr. Higher Plants. Elsevier Ltd., Amsterdam, The Netherlands Simonne, E. Hutchinson

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), brushing ( Latimer, 1998 ), and restricting irrigation ( Alem et al., 2015 ) and mineral nutrients ( Whipker et al., 1999 ). Although more widely used for ornamental flowering plants, several of these techniques are also useful for controlling containerized

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to deficiency of mineral micronutrients such as Fe and Zn. Conventional breeding of bananas with enhanced micronutrient content represents a sustainable way of increasing the bioavailability of Fe and Zn ( Harvestplus, 2004 ). The starting point for

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application significantly improved flower production and increased bud size and fresh weight, which increased the fruit set rate during the first abscission stage. Carbohydrates, mineral nutrients, and hormonal growth regulators have important roles in the

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localized cellular calcium deficiencies ( de Freitas and Mitcham, 2012 ; Pavicic et al., 2004 ). Calcium plays a structural role in the cell, and when calcium concentrations are low in the cell wall, cell permeability increases. Cell permeability

Open Access