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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Differences in potatoes yield structure cultivated in organic and integrated growing technology
 Erbenová, Veronika ; Hamouz, Karel (advisor) ; Milan, Milan (referee)
The aim of this study is to evaluate the impact of organic growing in comparison with conventional (integrated) cultivation on yield and its structure based on the results of its own field trials. On a selected topic I have compiled a literature review based on the professional literature. To this theme I established a field experiment in Dolní Brusnice in 2015. I used two varieties of potatoes (Adéla and Marabel). The experiment was established in the two versions of the integrated and the organic farming, each in four repetitions with twelve consecutive clusters. The results of the experiment in statistical evaluation showed that integrated cultivation significantly increases the yield of tubers under a bunch in comparison with the organic way of cultivation (in this case by 23 %). In the integrated variant was achieved higher average number of tubers under a clump versus the environmental variation. But it was only a trend. The result was inconclusive. The average weight of a tuber showed up again in an attempt to trend lower its value in organic farming but only for the Marabel variety. It was also assessed the damage mold leaf area in a potato, which was greater in the organic cultivation. The results of this study can be applied when deciding on the establishment of conventional (integrated) or organic crop of potatoes for the production of marketable tubers. At the same time I would like to emphasize that the results are only one year and cannot be generalized. They can be built upon in subsequent experiments.
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Effect of organic and conventional potato (Solanum tuberosum L.) farming on selected characteristics of potato tuber proteins
 MÍČKA, Tomáš
Diploma thesis follows the influence of organic and conventional potato management (Solanum tuberosum L.) on tuber protein content. Potato protein represents from 1/3 to {$^1\!/\!_2$} of total tuber nitrogen compound and belongs among the most valuable plant proteins - its high value is given by high level of essential amino acids. Important group of potato proteins is a patatin (complex of patatin proteins), which is considered as a major storage protein and has many important physiological functions such as antioxidant activity and function of defense system against pathogenic organisms. The aim of the the work was to determined content of crude protein, pure protein and patatin proteins representation in the total protein of potato tubers. The diploma thesis was solved using 5 potatoes varieties, 2 year{\crq}s repetition and variant of organic and conventional potato production system. The obtained data were statistically evaluated. It was found, that content of dry matter in potato tubers was significantly influenced by a year and locality of the field experiment. Crude protein content in potato tubers was significantly influenced by a year, variety and type of potato management system. The potato tubers produced under conventional and organic management contained 9.93 and 9.16 % of crude protein in dry matter, respectively. Pure protein content was significantly influenced by variety. The affect of crop management on the pure protein content was not statistically signifiant. However, slightly higher content of pure protein was evaluated in dry matter of potato tuber produced under convetional than under organic crop management resulting in average value of 4.23 and 3.86 %, respectively. Representation of pure protein in total content of nitrogen matters was significantly influenced by variety and a year of growing. Complex of patatin proteins (40-45 kDa) was detected for all of the evaluated potato varieties and variants of the field experiment. Higher number of patatin isoforms (with rather physiological function) was investigated in potato tubers from organic crop management.
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