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Open AccessArticle

Influences of Biodynamic and Conventional Farming Systems on Quality of Potato (Solanum Tuberosum L.) Crops: Results from Multivariate Analyses of Two Long-Term Field Trials in Sweden

by Lars Kjellenberg 1,*,† and Artur Granstedt 2,†
1
Department of Plant Breeding, Swedish University of Agriculture, P.O. Box 101, SE 230 53 Alnarp, Sweden
2
Biodynamic Research Institute, Skilleby, SE 153 91 Järna, Sweden
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Lucy van de Vijver
Foods 2015, 4(3), 440-462; https://doi.org/10.3390/foods4030440
Received: 30 June 2015 / Revised: 30 August 2015 / Accepted: 8 September 2015 / Published: 15 September 2015
(This article belongs to the Special Issue Organic food: what about the nutritional value and food safety?)
The aim of this paper was to present results from two long term field experiments comparing potato samples from conventional farming systems with samples from biodynamic farming systems. The principal component analyses (PCA), consistently exhibited differences between potato samples from the two farming systems. According to the PCA, potato samples treated with inorganic fertilizers exhibited a variation positively related to amounts of crude protein, yield, cooking or tissue discoloration and extract decomposition. Potato samples treated according to biodynamic principles, with composted cow manure, were more positively related to traits such as Quality- and EAA-indices, dry matter content, taste quality, relative proportion of pure protein and biocrystallization value. Distinctions between years, crop rotation and cultivars used were sometimes more significant than differences between manuring systems. Grown after barley the potato crop exhibited better quality traits compared to when grown after ley in both the conventional and the biodynamic farming system. View Full-Text
Keywords: biodynamic agriculture; conventional agriculture; product quality; principal component analysis; potato biodynamic agriculture; conventional agriculture; product quality; principal component analysis; potato
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Kjellenberg, L.; Granstedt, A. Influences of Biodynamic and Conventional Farming Systems on Quality of Potato (Solanum Tuberosum L.) Crops: Results from Multivariate Analyses of Two Long-Term Field Trials in Sweden. Foods 2015, 4, 440-462.

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