Effect of conventional and organic production systems on the yield and quality of field tomato cultivars grown in Tunisia

Riahi, Anissa; Hdider, Chafik; Sanaa, Mustapha; Tarchoun, Neji; Kheder, Mohamed Ben; Guezal, I.

doi:10.1002/jsfa.3720

Cited by 66 publications

(49 citation statements)

References 31 publications

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“…The plants surrounding the spot area did not die even though they were stressed and they showed a reduction in biomass and yield. Nevertheless, the average yield of tomato field (9.45 kg m -2 ) was comparable to the results of other experiments and the maximum yield value was higher than many works on the same tomato hybrid [Giorio et al, 2007;Riahi et al, 2009;ARSIA, 2010]. The figure 1 shows the field map of tomato yield; the highest productive areas were characterized by red and orange colours on the right side of the field, with a fruit yield of more than 10 kg m -2 ; at the top centre and on the north left side of the field, yield value average was of about 8 kg m -2 .…”

Section: Resultssupporting

confidence: 81%

Proximal sensing and vegetation indices for site-specific evaluation on an irrigated crop tomato

Marino

Alvino

2014

European Journal of Remote Sensing

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The present paper deals with proximal sensing technique applied to a drip irrigated tomato field. The aim of this "on farm" research was the evaluation of three Vegetation indices, WI (Water index) WI/NDVI and TSAVI (Transformed Soil Adjusted Vegetation Index), to analyze the correlation among VIs and tomato yield, to assess the spatial variability of a tomato crop, and finally to identify homogeneous crop area. Until 90 days after transplanting, tomato field was almost uniform, either at a visual assessment or according to spectroradiometric readings. At the end of the vegetative growth stage (from 90 days after transplanting), a spot crop area showed increasing soil moisture conditions due to soil topography. In this spot area, plants first yellowed and after started dying. Among indices, TSAVI appeared the most effective to detect excess soil water conditions, infect at 105 DAT TSAVI index was highly significant correlated to tomato yield, demonstrating to be a good index for early detecting excess crop water status. This study reinforce the possibility of detecting plant water stress by spectroradiometric measurements at field scale (ground-based measurements) and at territorial level.

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Section: Resultssupporting

confidence: 81%

Proximal sensing and vegetation indices for site-specific evaluation on an irrigated crop tomato

Marino

Alvino

2014

European Journal of Remote Sensing

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“…Blueberry bushes were planted at a spacing of 2.3 × 1.2 m. Bushes were planted on organic and conventional plantations, and the substrates differed in terms of mineral content. Specific environmental conditions and soil conditions (optimum pH of the substrate) resulted in larger berries on the organic plantations, and the total yield contained big berries (diameter, >12 mm; mean, 83.4%) with lower polyphenol content (287 mg 100 g or not organic foods have a nutritional advantage when compared to their conventionally produced counterparts (Riahi et al, 2009). However, some claim they do, and some doubt that there is any difference between the two cultivation methods (Bourn and Prescott, 2002;Brandt and Mφlgaard, 2001;Magkos et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Comparison of berry quality in highbush blueberry cultivars grown according to conventional and organic methods

Ochmian

Kozos²,

Chelpinski³

et al. 2015

Turk J Agric For

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in Szczecin and at a certified production farm specializing in the cultivation of highbush blueberry located in Szczecin. The effect of cultivation conditions-organic plantation in organic peat substrate (pH 3.46) and conventional plantation in mineral substrate (pH 5.32)-on the berry quality of four highbush blueberry cultivars (firmness, size, chemical composition including content of organic compounds and polyphenols) was examined. Blueberry bushes were planted at a spacing of 2.3 × 1.2 m. Bushes were planted on organic and conventional plantations, and the substrates differed in terms of mineral content. Specific environmental conditions and soil conditions (optimum pH of the substrate) resulted in larger berries on the organic plantations, and the total yield contained big berries (diameter, >12 mm; mean, 83.4%) with lower polyphenol content (287 mg 100 g -1 ). The berries of the Elliott cultivar, regardless of how the crops were grown, were the largest, characterized by the lowest content of SS (15.3%) and the highest acidity (0.98 g 100 g -1 ). They were also the most likely to shed. The Duke cultivar was most susceptible to mechanical damage (101 G mm) and was characterized by the lowest berry firmness (162 and 363 G mm) and polyphenol content (organic, 185 mg; conventional, 228 mg 100 g -1 ).

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“…Tomatoes are very important in human nutrition as they contain a lot of bioactive compounds [1–3]. Raw tomatoes in Poland are eaten mostly in summer and autumn, therefore tomato juice is an important substitute for the raw fruits.…”

Section: Introductionmentioning

confidence: 99%

The Seasonal Variation in Bioactive Compounds Content in Juice from Organic and Non-organic Tomatoes

Hallmann

Lipowski

Marszałek

et al. 2013

Plant Foods Hum Nutr

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A specific objective of this paper was to evaluate seasonal changes in bioactive compounds level (carotenoids and polyphenols) in juice prepared from organic and non-organic tomatoes in Poland. In the examined tomato juice, the content of dry matter, vitamin C, carotenoids as well as polyphenols (by HPLC method) has been measured. The presented results indicate the impact of the growing system and the year of production on the composition of tomato juice. The organic tomato juice contained significantly more beta-carotene, chlorogenic acid, rutin as well as more total phenolic acids, gallic acid, p-coumaric acid, total flavonoids, quercetin-3-O-glucoside and quercetin in comparison with the non-organic. The tomato juice from 2008 contained significantly more carotenoids and some flavonoids compared to the one produced in 2009, which contained significantly more dry matter, vitamin C, as well as quercetin and it derivatives.Electronic supplementary materialThe online version of this article (doi:10.1007/s11130-013-0352-2) contains supplementary material, which is available to authorized users.

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Effect of conventional and organic production systems on the yield and quality of field tomato cultivars grown in Tunisia

Cited by 66 publications

References 31 publications

Proximal sensing and vegetation indices for site-specific evaluation on an irrigated crop tomato

Proximal sensing and vegetation indices for site-specific evaluation on an irrigated crop tomato

Comparison of berry quality in highbush blueberry cultivars grown according to conventional and organic methods

The Seasonal Variation in Bioactive Compounds Content in Juice from Organic and Non-organic Tomatoes

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