Effect of Potassium and Magnesium on the Quality of Tomato Fruits

Borkowski, Jan; Szwonek, E.

doi:10.17660/actahortic.1986.191.13

Cited by 3 publications

(3 citation statements)

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“…In 2005 and 2007 fruit samples taken from plots treated with Kalisol had lower dry matter content when compared with those taken from control plots as well as those taken from plots treated with Final K. However in 2006 a reverse dependence was recorded. The obtained results do not confirm previous studies proving that the uptake of K directly relates to dry matter accumulation in fruit (Borkowski & Szwonek 1986, Adams & Ho 1995. Borkowski & Szwonek (1986) found that with the rates of potassium increasing from 200, 400, and 600 to 1000 mg•dm -3 the highest level of dry matter in tomato fruit was obtained at the highest rate of K. The lower content of dry matter in treat-ments with an additional foliar nutriation with potassium probably resulted from the fact that the fertilization did not affect an increase in the content of potassium in fruit (Table 7).…”

Section: Resultscontrasting

confidence: 99%

“…The higher content of phosphorus was observed in plants fertilized with Final K in comparison with control plants. The obtained results differ from the observations noted by Borkowski and Szwonek (1986). They have recorded a strong favourable effect of foliar fertilization on the level of potassium, phosphorus and magnesium in tomato fruit.…”

Section: Resultscontrasting

confidence: 99%

“…Foliar nutrition with potassium plays an important role also in other agrotechnical procedures. Potassium foliar nutrition is a treatment which can be quickly applied to plants and hence can contribute to the fuller utilization of yield potentiality (Szewczuk & Michałojć 2003), can improve the colour of fruit and can also intensify the development of numerous organic compounds (Borkowski & Szwonek 1986, Kowalska 2003. Potassium is found in the composition of organic compounds, it occurs in cells only as an ion and in this form it takes part in over 60 enzymatic reactions.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Potassium Foliar Nutrition on Changes in the Content of Carotenoid Pigments and on Some Parameters of the Nutritional Value of Tomato Fruit

Jedrszczyk

2010

Journal of Fruit and Ornamental Plant Research

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Effect of Potassium Foliar Nutrition on Changes in the Content of Carotenoid Pigments and on Some Parameters of the Nutritional Value of Tomato Fruit The aim of the study was to investigate the effect of potassium foliar nutrition on changes in the content of carotenoid pigments and on some parameters of the nutritional value of tomato fruit. The experiments were conducted on three tomato cultivars: Faustine F1, Atut F1 and Magnus F1. All trial plots with plants were additionally fertilized with 0.3% Final K and 0.3% Kalisol whilst in the control plots no foliar nutrition with potassium was applied. The chemical composition of tomato fruit depended on two factors: tomato cultivar and fertilization method and differed from year to year of investigation. In 2005 neither the cultivar nor the foliar fertilization affected the level of β-carotene while the fertilization with Final K resulted in the increase of lycopene content compared with the control. In 2006 and 2007 the fruits from treatments fertilized with Kalisol had significantly higher content of β-carotene and lycopene in compareson with those treated with Final K. The obtained results do not clearly show the effect of potassium foliar fertilization on the increase of dry matter, sugars or acids contant in tomatoes. Foliar fertilization with Kalisol increased the content of L-ascorbic acid in tomatoes in 2005 and 2007. In 2006 the content of this acid in fruit treated with Kalisol was at the same level as untreated plants but higher in plants treated with Final K. The effect of foliar nutrition with potassium had a variable influence on the level of the investigated macroelements (K, P, Ca, Mg). The content of β-carotene was positively correlated with the content of phosphorus and negatively correlated with the acidity of fruit.

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Section: Resultscontrasting

confidence: 99%

Section: Resultscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Potassium Foliar Nutrition on Changes in the Content of Carotenoid Pigments and on Some Parameters of the Nutritional Value of Tomato Fruit

Jedrszczyk

2010

Journal of Fruit and Ornamental Plant Research

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The significance of magnesium for crop quality

2013

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Background The quality of agricultural and horticultural products and its modulation by fertilization has increasingly received attention. However, whereas the importance of magnesium (Mg) as an essential plant nutrient is well established, the impact of Mg nutrition on quality parameters has only been rarely addressed. Scope This review aims at evaluating the available knowledge on the influence of Mg on produce quality. A short discussion on the term quality as used in this review is followed by an overview of the various functions of Mg in plant metabolism in relation to quality aspects. Finally, the available literature on Mg-associated effects on crop quality is critically surveyed. The question whether Mg application beyond yield optimum further improves crop quality is specifically addressed. Conclusion Increasing Mg supply on Mg-deficient sites tends to increase the quality of agricultural crops, particularly when the formation of quality traits is dependent on Mg-driven photosynthesis and assimilate translocation within the plant. In fruits and vegetables, ratios of Mg to other nutrients like Ca and K were shown to be a more reliable indicator of the quality response than the Mg status alone. Moreover, it is concluded that Mg doses beyond those required for maximum yield rarely induce a further improvement of produce quality.

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