Tag Archives: Rapeseed

519-530 B. Černilová, J. Kuře, M. Linda and R. Chotěborský
Tracing of the rapeseed movement by using the contrast point tracking method for DEM model verification
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Tracing of the rapeseed movement by using the contrast point tracking method for DEM model verification

B. Černilová¹*, J. Kuře¹, M. Linda¹ and R. Chotěborský²

¹Czech University of Life Sciences Prague, Faculty of Engineering, Department of Electrical Engineering and Automation, Kamýcká 129, CZ165 21 Prague – Suchdol, Czech Republic
²Czech University of Life Science Prague, Faculty of Engineering, Department of Material Science and Manufacturing Technology, Kamýcká 129, CZ165 21 Prague – Suchdol, Czech Republic.
*Correspondence: cernilova@tf.czu.cz

Abstract:

For designing the efficient storage and transport of rapeseed, it is necessary to follow the rules of bulk material, know its properties, and use appropriate equipment. The mentioned properties of bulk material are essential for simulating the numerical model and obtaining the parameters of the geometry particle tracing during the rapeseed manipulation. In order to determine the angle of repose and mechanical properties of rapeseed, the results of previous experiments were used. The aim of this paper was to propose the methodology for calculating the traces of individual particles using the contrast point method during a real test to calibrate and verify a numerical model of the same system as in a real test. RockyDEM software was used to create the numerical model of rapeseed. The numerical model was used to test the flow analysis of rapeseed particles. The experiment measuring rapeseed particle traces was performed using an assembled experimental device. The rapeseed particles and the contrast point particles were poured out from the device, and a camera recorded the process. In parallel with the real experiment, the angle of repose test was performed on the same device to verify the numerical model. The results showed that the methodology is suitable for the DEM model verification with an accuracy of 3.77 mm in the X-axis, 0.55 mm in the Y-axis and 1.7 mm in the Z-axis. This confirmed that the proposed method is suitable for determining the surface behaviour of bulk material to verify the DEM model.

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1584–1596 A. Zymaroieva, O. Zhukov, T. Fedonyuk and T. Pinkina
The spatio-temporal trend of rapeseed yields in Ukraine as a marker of agro-economic factors influence
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The spatio-temporal trend of rapeseed yields in Ukraine as a marker of agro-economic factors influence

A. Zymaroieva¹*, O. Zhukov², T. Fedonyuk³ and T. Pinkina⁴

¹Zhytomyr National Agroecological University, Faculty of Forestry, Department of Forest Resources Utilization, Stary Blvd, 7, UA10008Z Zhytomyr, Ukraine
²Bogdan Khmelnitsky Melitopol State Pedagogical University, Faculty of Chemistry and Biology, Botany and Horticulture Department, Hetmanska steet 20, UA72318 Melitopol, Ukraine
³Zhytomyr National Agroecological University, Faculty of Forestry, Department of Forest Ecology and Life Safety, Stary Blvd, 7. UA10008 Zhytomyr, Ukraine
⁴Zhytomyr National Agroecological University, Faculty of Ecology and Law, Department of Bioresources, Aquaculture and Natural Sciences, Stary Blvd, 7, UA10008 Zhytomyr, Ukraine
*Correspondence: nastya.zymaroeva@gmail.com

Abstract:

The paper demonstrates the applicability of several statistical methods to the analysis and interpretation of the average rapeseed yield data. It proves our hypothesis that the general trend of rapeseed yield variations in Ukraine during 1991–2017 occurred due to agro-economic and agro-technological factors, which are the determinants of the revealed general trend. The temporal trend of rapeseed yield in most administrative districts can be described by a fourth-degree polynomial, namely, its characteristic points enabled us to describe and interpret the dynamics of rapeseed yields. The absolute term of the polynomial shows the initial conditions of the process, and its mapping allows us to identify the areas with the most favorable soil-climatic conditions for the rapeseed cultivation. Indicators of the maximum rate of growth and decrease of yields are the markers of stability of agro-ecosystems to the external influences. Therefore, the mapping of the maximum rate of decline and increase of yields reveal areas in which yields respond rapidly (increasing / falling) to the changes in agro-economic and agro-technological conditions, as well as areas where yields are more stable and change gradually. Thus, the form of the yield trend is determined by the influence of agro-technological and agro-economic factors, whose contribution to the fluctuation in rapeseed yields varies from 53% to 90%.

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230-242 E. Samadzadeh Ghale Joughi, E. Majidi Hervan, A.H. Shirani Rad and GH. Noormohamadi
Fatty acid composition of oilseed rapeseed genotypes as affected by vermicompost application and different thermal regimes
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Fatty acid composition of oilseed rapeseed genotypes as affected by vermicompost application and different thermal regimes

E. Samadzadeh Ghale Joughi¹, E. Majidi Hervan¹*, A.H. Shirani Rad² and GH. Noormohamadi¹

¹Department of Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran
²Department of Agronomy, Seed and Plant Improvement Institute, AREEO, Karaj, Iran
*Correspondence: majidi_e@yahoo.com

Abstract:

Vegetable oils with a high relative amount of unsaturated fatty acids are of great significance for human health. Hence, in a 2-year factorial split plot experiment, the effects of different sowing date (optimum (October 17) and late (October 27)), vermicompost (0 and 20 ton ha-1) and genotypes (BAL104, DIE710.08, BAL102, FJL330, FJL290 and Okapi) on the fatty acid composition of rapeseed were evaluated. Rapeseed genotypes and the combination of sowing date and vermicompost application were randomized to sub and main-plots, respectively. The present results revealed that yield, oil percentage and fatty acids composition is affected by sowing dates along with genotypes. However, the unsaturated fatty acid, eicosanoic acid was not affected by interaction sowing date and genotype. Vermicomposting increased the yield, oil percentage, oleic, linoleic and linolenic acids and decrease erucic unsaturated fatty acid. The FJL290 and BAL102 genotypes produced the highest values of grain yield (5,853 and 5,763 kg ha−1, respectively), oil percentage (43.98% and 43.85%, respectively), linoleic % acid (20.51 and 20.37% respectively), oleic % acid (65.23 and 64.93% respectively) and linolenic % acid (7.20 and 7.09% respectively) in comparison to the other genotypes, when they were sown at the optimum sowing date. The FJL290 and BAL102 also accelerated their growth period at the late sowing date. Consequently, oleic, linoleic and linolenic acids had the highest direct and indirect effect influence on grain oil percentage indicating their importance as selection criteria to improve yield and oil quality of rapeseed. Concluding the combination of sowing date, vermicompost and FJL290 and BAL102 lines may be the most favourable cropping strategy for rapeseed production in Iran.

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