Tag Archives: starch yield

124-133 P. Fejér, A. Széles, É. Horváth, T. Rátonyi and P. Ragán
Effects of some agronomic practices on the quality of starch content of maize grains
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Effects of some agronomic practices on the quality of starch content of maize grains

P. Fejér*, A. Széles, É. Horváth, T. Rátonyi and P. Ragán

University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Land Use, Engineering and Precision Farming Technology, 138 Böszörmenyi str., HU4032 Debrecen, Hungary
*Correspondence: fejerp@agr.unideb.hu

Abstract:

The use of maize, both as main and by-product, is extremely versatile and diverse. The highest amount of carbohydrate within maize is found in the form of starch (C6H10O5)x. In terms of industrial starch, maize is the most important raw material. Fodder maize is primarily an energy source due to its high starch content, and its protein and oil content are less important. It was found that starch and protein content, which are negatively correlated with each other, are significantly affected by fertilizer doses. The experiment is located in the Hajdúság Loess Plateau, its soil is loess-based deep humus layered calcareous chernozem. The following treatments were applied in the scope of the polyfactorial experiment: Tillage: T1 = winter ploughing, T2 = strip tillage, T3 = ripping. Crop years: 2017, 2018 and 2019. Fertilization treatments: N 0 kg ha-1 P2O5 0 kg ha-1 K2O 0 kg ha-1 (control); N 80kg ha-1 P2O5 60 kg ha-1 K2O 90 kg ha-1 and N 160 kg ha-1 P2O5 60 kg ha-1 K2O 90 kg ha-1. Analysis of the nutritional component was carried out by means of a Foss Infratec TM 1241 Grain Analyser.

In terms of fertilization treatments, the highest (64.42%) maize starch content was measured for the control treatment, while the lowest starch content was recorded in the case of the 160 kg N ha-1 treatment (62.62%). The analysis of the crop year effect showed that 2018 was the most favourable year for the maize starch content of the examined samples (65.76%). Of the studied years, the lowest starch content was measured in 2017 (61.78%).

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1193-1201 V. Eremeev, B. Tein, P. Lääniste, E. Mäeorg and J. Kuht
The effect of pre-planting thermal treatment of seed tubers on the yield and quality of potato
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The effect of pre-planting thermal treatment of seed tubers on the yield and quality of potato

V. Eremeev*, B. Tein, P. Lääniste, E. Mäeorg and J. Kuht

Estonian University of Life Sciences, Kreutzwaldi 1, EE51014 Tartu, Estonia *Correspondence: vyacheslav.eremeev@emu.ee

Abstract:

Field trials with the potato cultivars ‘Ants’ (medium late) and ‘Laura’ (medium early) were carried out on the experimental fields of the Department of Field Crops and Grassland Husbandry located at Eerika (58°22′ N, 26°40′ E), Estonian University of Life Sciences in 2010 and 2011. The yield of tubers and starch, marketable yield of potato, number of tubers per plant and tuber weight were studied. We used the following treatments: untreated control (To): seed tubers were planted directly from storage house (storage temperature 4°C); thermal shock (TS): seed tubers were kept before planting 5 days in a room with temperature of 30°C and 2 days with temperature of 12°C; pre-sprouting (PS): before planting the seed tubers were kept 26 days in a room with temperature of 15°C and 10 days with temperature of 12°C. The results are presented as the averages of studied years. According to the average results of two experimental years, the pre-planting treatment with thermal shock increased the number of tubers per plant of cultivar ‘Ants’ by 30.6%, compared to control treatment. None of the treatments had any effect on the number of tubers of cultivar ‘Laura’. The thermal treatment increased the average weight of tubers of cultivar ‘Laura’ compared to the control treatment (thermal shock by 14.7%, pre-sprouting by 20.7%), but for cultivar ‘Ants’ the weight of tubers was decreased by 16.7% (thermal shock treatment). The thermal shock treatment increased the tuber yield of cultivar ‘Ants’ by 10.7% and the pre-sprouting increased the total tuber yield of cultivar ‘Laura’ by 9.9%. The thermal shock increased significantly the starch content of cultivar ‘Ants’ and decreased that of cultivar ‘Laura’.

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