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Organic or mineral fertilization

effects on tomato plant growth and fruit quality

Heeb, Anuschka (2005). Organic or mineral fertilization. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2005:73
ISBN 91-576-6972-4
[Doctoral thesis]

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To meet Swedish environmental goals organic farming will play an important role in the development of a sustainable and high quality food production system. However, several conflicts exist, such as the achievement of high yields without the use of chemical fertilizers or pesticides and the minimization of nutrient losses. In this thesis the effect of organic fertilizers compared to mineral fertilizers on plant product quality was investigated. Tomato yield and quality aspects such as taste and chemical composition were measured. Three greenhouse experiments were performed at the Swedish University of Agricultural Sciences in Uppsala during 2002 and 2004. Organic fertilizers, based on chicken manure or fresh grass clover mulch, were compared to mineral fertilizer nutrient solutions with ammonium or nitrate as the dominant nitrogen source. In both years yields from the mineral fertilized tomato plants were higher than from the organic fertilized ones. However, plant nitrogen status was similar for all treatments and the limiting nutrient in the organic grass-mulch treatment appeared to be sulphur, as the addition of mineral sulphur increased the yield. The effects on quality appeared to be more complex. While taste test scores and vitamin C contents in 2002 were highest in the organic or ammonium-fertilized tomatoes and lowest in the nitrate-fertilized tomatoes, in 2004 the results were contrary. Taste is a complex quality aspect, affected by sugars, acids and other secondary compounds (aromatic flavour compounds), which apart from nutrient supply are affected by environmental conditions as sunlight and temperature that are beyond the grower’s control. It was concluded that organic or mineral fertilizers are not the major factors affecting yield and product quality. A balanced nutrient supply is important for yield and quality, irrespective nutrient source. A combination of organic and mineral fertilizers should be considered in order to achieve a resource saving and balanced nutrient supply and a high quality tomato yield.

Authors/Creators:Heeb, Anuschka
Title:Organic or mineral fertilization
Subtitle:effects on tomato plant growth and fruit quality
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2005
Number of Pages:36
ALLI. Heeb, A., Lundegårdh, B., Ericsson, T. & Savage, G.P. 2005. Effects of nitrate-, ammonium-, and organic-nitrogen-based fertilizers on growth and yield of tomatoes. Journal of Plant Nutrition and Soil Science 168, 123-129. II. Heeb, A., Lundegårdh, B., Ericsson, T. & Savage, G.P. 2005. Nitrogen form affects yield and taste of tomatoes. Journal of the Science of Food and Agriculture 85, 1405-1414. III. Toor, R.K., Savage, G.P. & Heeb, A. 2005. Influence of different types of fertilisers on the major antioxidant components of tomatoes. Journal of Food Composition and Analysis, in press. IV. Heeb, A., Lundegårdh, B., Savage, G.P. & Ericsson, T. The nutrient balance of both organic and inorganic fertilizers affects yield, taste and nutritional quality of tomatoes, submitted to the Journal of Plant Nutrition and Soil Science.
Place of Publication:Uppsala
Associated Programs and Other Stakeholders:Z - SLU - Library > Odla mera
ISBN for printed version:91-576-6972-4
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F01 Crop husbandry
Subjects:Not in use, please see Agris categories
Agrovoc terms:lycopersicon esculentum, nitrogen fertilizers, organic fertilizers, organic agriculture, quality, taste (sensation), secondary metabolites
Keywords:Lycopersicon esculentum, metabolomics, nitrogen form, organic vs conventional production, product quality, taste, secondary metabolites
Permanent URL:
ID Code:890
Department:(NL, NJ) > Dept. of Crop Production Ecology
Deposited By: Anuschka Heeb
Deposited On:29 Aug 2005 00:00
Metadata Last Modified:22 Mar 2015 15:11

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