Abstract
Potato protein is a valuable source of essential plant-derived amino acids, the composition of which is similar to that of chicken egg protein considering the amino acid reference. Many factors used in potato cultivation can modify its composition. The use of bio-fertilizers in potato growing offers a possibility of a better use of minerals from soil and organic sources and reducing the need for mineral fertilizers by activating minerals present in soil. The effect can be to improve not only the potato tuber yield but also the nutritional value. The aim of this study has been to determine the hanges in the content of crude protein and the composition of amino acids in potato tubers, depending on the application of the bio-fertilizer (UGmax), organic fertilizers (pea as a catch crop, straw, and farmyard manure (FYM)) as well as mineral fertilization (100% and 50% of the reference rate). The application of bio-fertilizer significantly increased the content of essential and non-essential amino acids in potato tuber protein. With the half-decreased mineral fertilization rate, bio-fertilizer most effectively increased the content of tyrosine, methionine, asparagine in potato tuber protein in the treatments with FYM or with a catch crop as well as without organic fertilization.
Highlights
A modern intensive management system, based on the use of fertilizers acquired outside the farm, especially mineral fertilizers and pesticides, to achieve maximum profits, has caused environmental pollution
This article has analyzed the content of crude protein (CP) and the profile of amino acids in ‘Satina’ potato tubers from a 3-year field experiment where a full and half-decreased mineral fertilization, organic sources and UGmax bio-fertilizer were applied
The highest content of crude protein was found following the use of catch crop as organic sources with a full rate of mineral fertilization and the bio-fertilizer
Summary
A modern intensive management system, based on the use of fertilizers acquired outside the farm, especially mineral fertilizers and pesticides, to achieve maximum profits, has caused environmental pollution (water pollution, intensification of soil degradation, and simplification of biodiversity). Monoculture, zero tillage, reduced organic fertilization, and the introduction of new cultivars accompanied by increased pesticides pose a threat, which results in some deterioration of the physical, chemical and microbiological properties of the soil and, as a result, of the quantity and the quality of the crop [1,2]. This is counteracted by the implementation of the concept of sustainable agricultural production, which, requires a number of adjustments in terms of organization, especially the basic elements of technology, especially crop rotation, fertilization, and plant protection. The UGmax bio-fertilizer is a microbiological preparation which consists of yeast, lactic acid bacteria-Lactobacillus and Lactococcus; Pseudomonas; Actinobacteria and Azotobacter as well as small amounts of micro-and
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