Alterations in flax yield and quality in response to various mineral nutrition

Document Type : Research Paper

Authors

1 Department of Animal Feeding, Russian State Agrarian University, Moscow Timiryazev Agricultural Academy,49, Timiryazevskaya Str., Moscow, Russia

2 Department of Chemistry, Russian State Agrarian University, Moscow Timiryazev Agricultural Academy, 49, Timiryazevskaya Str., Moscow, Russia

3 Department of Agrochemical, Russian State Agrarian University, Moscow Timiryazev Agricultural Academy, 49, Timiryazevskaya Str., Moscow, 127550, Russia

10.22124/cjes.2023.7334

Abstract

The researchers of Russian State Agrarian University, Moscow Timiryazev Agricultural Academy conducted in 2013-2016 a long-term stationar experiment to study chemical and toxicological properties of fiber flax, Voskhod variety, growing on sod-podzolic soil in the soil and climate of the Moscow region. Test plots were selected with following crop rotation options: (i) without fertilizers, without liming; (ii) without fertilizers, with liming; (iii) N100P150K120 (kg ha-1), without liming; (iv) N100P150K120, with liming; (v) N100P150K120 + manure 20 ton ha-1, without liming; and (vi) N100P150K120 + manure 20 ton ha-1, with liming. The agro-climatic conditions of the growing seasons during the research years did not have a negative impact on the growth and development of fiber flax. The hydro-thermal indices were 1.1 in 2013, -1.05 in 2014, 1.5 in 2015, and 1.5 in 2016. The maintained crop rotation and the introduction of a full range of mineral and organic fertilizers were found to contribute to high yields of flax in terms of fiber (18.5-18.9 hwt ha-1) and seeds (7.9-8.3 hwt ha-1). The seeds contained 16.9-19.5% protein and 33.5-39.4% lipids. The yield of flaxseed oil from seeds ranged from 19.5-35.7% on average for different variants of the experiment. The peroxide number index was 1.5-2.5 mg-eq O2 kg-1, and the acid number index was 1.1-1.9 mg KOH g-1, which correspond to the obtaining high-quality linseed oil in compliance with quality standards for all variants of the experiment. In the fatty acid composition of flaxseed oil, the content of total saturated fatty acids, the amount of unsaturated fatty acids and a high content of essential α-linolenic acid were 9.0-14.1%, 85.9-91.0%, and 46.9-60.9% respectively.

Keywords


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