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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Nutrition status of greenhouse tomato grown in inert media. Part II. Microelements

100%
Chohura P., Komosa A.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2003
|
tom 02
|
nr 2
The effect of inert media and fertilization levels on nutrition status of green house tomato cv. ‘Maeva F₁’ was investigated. Mean microelement content was: 118.5 mg Fe, 51.7 mg Zn, 269.0 mg Mn and 11.43 mg Cu kg⁻¹ of dry mass of the index parts of the tomato (9–10 leaf form the top). No significant effect of rockwool, expanded clay and polyurethane foam on microelement contents was found in the index parts of the greenhouse tomato, except for zinc whose content was significantly higher in the leaves of the plants grown in rockwool and polyurethane foam than in expanded clay. Fertilization levels did not affect significantly the content of iron, manganese and copper in the index parts, except for zinc whose content lowered at higher fertilization level. High tolerance of the tomato plants to zinc and manganese content in feeding solutions was indicated. No phytotoxicity of zinc nor manganese was found at the content of 2.01 mg Zn and 1.78 mg Mn dm⁻³ of water or feeding solution.
2
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Hydroponic pH modifiers affect plant growth and nutrient content in leafy greens

84%
Singh H., Dunn B., Payton M.
Journal of Horticultural Research
|
2019
|
tom 27
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nr 1
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Effect of mycorrhiza and the phosphorus content in a nutrient solution on the yield and nutritional status of lettuce grown on various substrates

84%
Kowalska I., Konieczny A., Gastol M.
Journal of Elementology
|
2015
|
tom 20
|
nr 3
The potential of mycorrhization of lettuce in hydroponic conditions was tested in a two-year experiment carried out in the autumn of 2011 and 2012 in an unheated foil tunnel. The experimental factors were as follows: inoculation of plants with arbuscular mycorrhizal fungi (AMF+ or AMF-), concentration of phosphorus in a nutrient solution (10 or 40 mg dm-3) and the type of substrate (rockwool or coconut coir). The inoculation of plants with arbuscular mycorrhizal fungi of the genus Glomus was performed twice, i.e. while sowing seeds and when planting lettuce plants into mats. The impact of the experimental factors on the degree of colonization of lettuce roots by AMF as well as the yield and nutritional status of plants, expressed as the content of macro- and micronutrients, was studied. The mycorrhizal frequency in roots inoculated with AMF reached 51.36%. The nutrient solution concentration of phosphorus and the type of substrate did not have any significant effect on the mycorrhizal frequency. There were no differences in the yield and content of macronutrients in lettuce leaves between plants inoculated and not inoculated with AMF (AMF+, AMF-). Likewise, there were no differences in the yield caused by different phosphorus levels in the nutrient solution or the types of substrate. Plants growing on rockwool accumulated significantly less P, Ca and Mg in comparison to plants growing on coconut coir. Regarding Ca, this effect was especially pronounced in plants receiving the nutrient solution with a higher concentration of P, i.e. 40 mg dm-3. Mycorrhiza had a significant effect on the content of Cu, Mn and Zn in lettuce leaves. Inoculated plants were characterized by a lower content of these micronutries compared to plants grown without AMF. With respect to Mn, this effect was particularly evident in plants grown on rockwool.
4

The effect of different NH4-NO3 ratios on the production and quality of gerbera grown in rockwool

84%
Guba W.
Journal of Fruit and Ornamental Plant Research
|
1994
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tom 02
|
nr 4
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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The effect of nutrient solution pH on phosphorus availability in soilless culture of tomato

84%
Dysko J., Kaniszewski S., Kowalczyk W.
Journal of Elementology
|
2008
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tom 13
|
nr 2
Greenhouse experiments with tomato were conducted in the years 2004-2006. The aim was to study the effect of nutrient solution pH on the availability of phosphorus in soilless culture of tomato. Tomato plants were grown on mats made of shredded rye straw, and on slabs of peat and rockwool. The plants were fertilized with a standard nutrient solution of different pH: 4.5, 5.0, 5.5, 6.0 and 6.5. Such different pH levels of the nutrient solution used in soilless culture modified the pH of the root growth zone. This effect was more evident in rockwool than in the organic media (especially straw). The phosphorus content in the root zone was closely associated with the pH value of the supplied nutrient solution and the kind of growing medium. Considerably lower concentrations of phosphorus were recorded in the organic media (straw, peat) than in rockwool. As the pH level of the nutrient solution increased, so did the pH of the root zone, whereas the amount of available P-PO4 decreased. The course of these changes was similar in all the substrates. However, the dynamics of the changes was weaker in the organic media. With an increase in the pH of the nutrient solution, the average phosphorus content in tomato leaves decreased. The P-PO4 concentration was higher in the leaves of tomato plants growing in rockwool compared to those in the organic media. A significantly higher marketable yield was obtained from tomato plants cultivated in rockwool than in the organic media. For all the growing media, the highest yield of tomatoes was obtained after feeding the plants with the nutrient solution of pH 5.5.
6

The effect of pH in the root medium on production and quality of gerbera grown in rockwool

84%
Guba W.
Journal of Fruit and Ornamental Plant Research
|
1994
|
tom 02
|
nr 3
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Reducing the salinity impact on soilless culture of tomatoes using supplemental Ca and foliar micronutrients

67%
Saleh S., Liu G., Liu M., Liu W., Gruda N., He H.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2019
|
tom 18
|
nr 3
Salt stress is known as one of the most severe abiotic factors limiting the plant production all over the world. In this study, three additives: (i) supplemental Ca (5 mmol L–1) to nutrient solution, (ii) foliar application of micronutrients (Fe, Mn and Zn at 60, 160 and 110 mg L–1, respectively), and (iii) combination of both of them were evaluated aiming to reduce the negative impact of salt stress on tomato plants cultivated in a soilless culture and improve the internal quality of fruits. The obtained results show that salinity reduced vegetative growth and physiological parameters, fruit yield and its components, and even more lowered fruit market classification of tomatoes. Salinity treatment reduced most of essential macro- and micronutrients in tomato fruit, whilst Na content was increased. Tomato productivity and fruit quality were ameliorated under saline conditions by increasing Ca into nutrient solution and applying a foliar application of micronutrients. A combination of both additives ranked the first to alleviate the adverse effects of salinity on tomatoes, followed by solo supplemental Ca into saline nutrient solution. On the other hand, the internal fruit quality of antioxidant compounds, such as vitamin C, lycopene, α-carotene, β-carotene and lutein as well as acidity, total soluble solid and dry matter percent, were increased under saline conditions.
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Effect of nutrient solution pH regulated with hydrochloric acid on the concentration of Cl- ions in the root zone on soilless culture of tomato

67%
Kowalczyk W., Dysko J., Kaniszewski S.
Journal of Elementology
|
2008
|
tom 13
|
nr 2
The experiment was carried out in a greenhouse in the years 2004-2006. Tomato plants of cv. Blitz F1 were fertilized with a nutrient solution of different pH: 4.5, 5.0, 5.5, 6.0 and 6.5. The required nutrient solution pH was obtained by adding adequate amounts of 65% HNO3 and 33% HCl. Nitric acid was used to adjust the nutrient solution’s acidity to pH 6.5. Lower pH levels were obtained adding hydrochloric acid. The amount of the acid needed to adjust the nutrient solution pH to a required level was determined against a water acidification curve. Tomato plants were grown on organic media (peat and rye straw) and an inert medium (rockwool). Changes in the Cl- concentration in the root zone during the cultivation period depended on the kind of substrate and the concentration of chlorides in the applied nutrient solution. In the straw substrate, irrespective of the applied nutrient solution pH, higher concentrations of Cl- occurred in the early stages of cultivation. The concentration of chlorides in peat and rockwool increased during the tomato cultivation period at all of the applied pH levels of the nutrient solution. More chloride ions accumulated in the growth substrates when the nutrient solution has lower pH. Higher Cl- concentration was a result of larger doses of hydrochloric acid. However, when pH is regulated with hydrochloric acid, the permissible chloride concentration levels in the applied nutrient solution and in the root zone of tomato plants are not exceeded. As the concentration of chlorides in the nutrient solution increases, so does the Cl- content in leaves of tomato plants.
9

Preventive application of biocontrol agents and disinfectants in an open system in rockwool culture of tomato and cucumber

67%
Slusarski C.
Bulletin of the Polish Academy of Sciences. Biological Sciences
|
2003
|
tom 51
|
nr 2
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