Influence of Organic and Conventional Growing Conditions on the Nutrient Contents of White Head Cabbage (<i>Brassica oleracea</i> var. <i>capitata</i>) during Two Successive Seasons

Çıtak, Sedat; Sönmez, Sahriye

doi:10.1021/jf903416a

Cited by 25 publications

(13 citation statements)

References 14 publications

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“…Of course, many factors can influence the content of vitamin C including growing conditions, growing locations and cultivars, and the findings cannot be generalized (Lee & Kader 2000). Vitamin C levels found in jambu were lower than in other vegetables, such as spinach, grown under either conventional or organic fertilization (Citak & Sonmez 2010).…”

Section: Resultsmentioning

confidence: 93%

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Antioxidant compounds of organically and conventionally fertilized jambu (Acmella oleracea)

Borges

Vieira

Vianello

et al. 2015

Biological Agriculture & Horticulture

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Acmella oleracea (jambu), native to the Amazonas region (Brazil), has cosmetic and pharmacological properties, many of which are due to chemical components with antioxidant activity. Since organic cultivation has been reported to induce an increase in metabolic antioxidant components, this study aimed to determine the content of phenolic compounds, carotenoids, vitamin C, and polyamines, and the activity of peroxidase in two cultivars of jambu, Jambuarana, and Nazareth. Furthermore, leaves and inflorescences were studied to estimate the relative contribution of these tissues to the antioxidant potential of jambu. Organic farming induced higher levels of total phenolics and carotenoids in Jambuarana leaves and of spermidine and spermine in leaves and flowers of both the cultivars than conventional cultivation. Conventional fertilization led to nitrate accumulation in inflorescences and vitamin C in leaves, and to a higher total organic nitrogen content in jambu leaves and flowers than in organic cultivated plants. The fertilization procedures did not affect the activity of the enzyme peroxidase, but differences were observed between cultivars

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Section: Resultsmentioning

confidence: 93%

“…Several studies have shown that the mode of cultivation influences the content of compounds such as nitrate (Citak & Sonmez 2010), which can range from 1 to 10,000 mg kg −1 (Ximenes et al 2000), and antioxidants (Lima & Vianello 2011). However, contradictory data have been presented (Hoefkens et al 2010;Smith-Spangler et al 2012).…”

mentioning

confidence: 99%

Antioxidant compounds of organically and conventionally fertilized jambu (Acmella oleracea)

Borges

Vieira

Vianello

et al. 2015

Biological Agriculture & Horticulture

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“…It was slightly acidic, so would have slightly countered the effects of the alkaline soil used in the experiment. Poultry manure from other sources can be slightly alkaline, giving a tendency to raise soil pH (Citak and Sonmez, 2010;McGrath et al, 2010), and such manure would be less useful in the soil used in our experiment.…”

Section: Resultsmentioning

confidence: 99%

Elemental Composition of Pepper Plants Fertilized With Pelletized Poultry Manure

Şahin

Taşkın

Kadıoğlu

et al. 2014

Journal of Plant Nutrition

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2 Poultry manure (PM) has been traditionally applied to crops for decades as an organic fertilizer, because it is a good and balanced source of plant nutrients. Its effect on plant growth and yield has been widely investigated and is well known. However, there has been little effort to relate elemental compositions of the manure applied to their concentrations in the plants. The objective of this study was to examine the effects of PM on the growth, and essential and non-essential element composition of pepper (Capsicum annuum) leaves and also fruits. Pepper plants were grown in soil with 0, 10, 20, and 40 g kg −1 PM under greenhouse conditions. Concentrations of nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sulfur (S), silicon (Si), aluminum (Al), iron (Fe), zinc (Zn), copper (Cu), manganese (Mn), molybdenum (Mo), chloride (Cl), nickel (Ni), bromine (Br), rubidium (Rb), strontium (Sr), barium (Ba), lanthanum (La), and cerium (Ce) in leaves at the flowering stage and in fruits were determined by polarized energy dispersive X-ray fluorescence (PEDXRF). Poultry manure fertilization significantly improved pepper shoot growth and also fruit yield, and increased leaf and fruit P concentrations but not N, K, Mg, Si, Al, Ni, and Fe. Leaf Ca was significantly reduced by increased rate of PM application. Applied PM increased the concentrations of leaf and fruit Zn and Cl. Poultry manure applications had a positive effect on the concentrations of leaf Cu, and fruit Mn. The concentrations of Rb and Ce in fruits and Br in fruit and leaves were increased by PM treatments. Applied PM levels had no clear effect on the concentrations of Ba and La in pepper leaves. The leaf Ba was the highest with 10 g kg −1 PM, and leaf La was higher in 20 and 40 g kg −1 PM treatments than in the control.

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“…Mantovi et al [36] reported that wheat grain from amended soils showed higher P concentrations than those of plants treated with mineral fertilizers. Citak and Sonmez [38] also noted a greater concentration of nutrients in the edible part of cabbage (Brassica oleracea) when grown in soil amended with organic residues (bovine and chicken manure and blood meal) when compared to vegetables composted with mineral fertilizers.…”

Section: Soil Phosphorus Content In the Long-term Experimentmentioning

confidence: 97%

Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludge

Nogueirol

Melo

Bertoncini

et al. 2015

Applied and Environmental Soil Science

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Urban wastes such as sewage sludge can be an economically viable alternative source for providing macro- and micronutrients to plants in tropical conditions. Sewage sludge is normally rich in phosphorus (P), which is present in soils mainly in organic forms, so that it is very important to establish methods for estimating its availability to plants. This study aimed to test three extractants that simulate P-uptake by maize (Zea mays) cropped in plots after 13 consecutive years of fertilization with sewage sludge, in a cycle of fertilized sugarcane (SaccharumL.) amended with sewage sludge and organic compost. Soil samples were collected at depths of 0–10, 10–20, and 20–40 cm in March 2010 from the two experimental areas. Soil P was extracted via ion exchange resin, Mehlich-I, and 0.025 M H2SO4and determined via colorimetry. Maize and sugarcane diagnostic leaves were collected in the experiments, subjected to nitric-perchloric digestion, and the leaf-P content was determined via colorimetry. No significant correlations were found between phosphorus extracted from soils and phosphorus concentrations in diagnostic leaves. Resin extracted larger amounts of P in the short-term experiment, while acidic extractants yielded larger amounts in the long-term experiment.

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Influence of Organic and Conventional Growing Conditions on the Nutrient Contents of White Head Cabbage (Brassica oleracea var. capitata) during Two Successive Seasons

Cited by 25 publications

References 14 publications

Antioxidant compounds of organically and conventionally fertilized jambu (Acmella oleracea)

Antioxidant compounds of organically and conventionally fertilized jambu (Acmella oleracea)

Elemental Composition of Pepper Plants Fertilized With Pelletized Poultry Manure

Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludge

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