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Tytuł:
Variability in and correlations among selected physical properties of European larch (Larix decidua Mill.) seeds
Autorzy:
Kaliniewicz, Z.
Tylek, P.
Anders, A.
Markowski, P.
Rawa, T.
Powiązania:
https://bibliotekanauki.pl/articles/297835.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
seeds
physical properties
coefficients
correlation
Opis:
Selected physical attributes of European larch seeds harvested from 2 seed plantations and 2 commercial seed stands in north-eastern Poland were determined. The physical properties of seeds were measured, and the results were used to calculate indicators of seed weight and the frictional and geometric properties of seeds. Physical attributes and indicators were compared by Student’s t-test for independent samples, analysis of variance, correlation analysis and linear regression analysis. The average values of physical properties and indicators were determined at: critical transport velocity - from 5.93 to 6.13 m • s-1, thickness - from 1.25 to 1.43 mm, width - from 2.29 to 2.71 mm, length - from 3.71 to 4.57 mm, angle of sliding friction - from 27.85 to 31.98o, weight - from 4.03 to 6.14 mg, coefficient of sliding friction - from 0.54 to 0.63, arithmetic mean diameter - from 2.42 to 2.90 mm, geometric mean diameter - from 2.20 to 2.60 mm, aspect ratio - from 59.60 to 62.38%, sphericity index - from 57.27 to 59.40%, specific weight - from 1.81 to 2.33 g • m-1, volume - from 4.60 to 7.59 mm3 and density - from 0.82 to 0.91 g • cm-3. The material harvested in seed plantations differed from seeds from commercial seed stands in all parameters, excluding critical transport velocity. Seed weight was most correlated with the remaining parameters. The highest value of the correlation coefficient and the equation with the highest value of the coefficient of determination were reported for the dependence between seed weight and seed length. Seed weight was also relatively highly correlated with seed width, therefore, the use of mesh screens with round openings and/or cylindrical grain graders is recommended in seed sorting processes.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2014, 17(2); 123-134
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlations between basic physical parameters of nuts and the weight of common beech (Fagus sylvatica L.) seeds
Autorzy:
Kaliniewicz, Z.
Tylek, P.
Anders, A.
Markowski, P.
Rawa, T.
Andros, K.
Powiązania:
https://bibliotekanauki.pl/articles/297912.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
nuts
seeds
physical properties
variation
correlation
Opis:
Selected physical attributes of common beech nuts harvested from four tree stands in northern Poland were determined. Seeds were manually extracted from every nut. Seeds and nuts were weighed, and the results were used to determine the ratio of seed weight to nut weight, which described the degree of nut filling. Physical parameters and the calculated coefficients were compared by the t-test for independent samples, analysis of variance, correlation analysis and linear regression analysis. The following ranges of variation were reported in the physical attributes of nuts and the coefficients of common beech seeds: critical transport velocity of nuts - from 6.33 to 11.28 m s-1, nut thickness - from 4.76 to 9.86 mm, nut width - from 6.46 to 13.54 mm, nut length - from 12.63 to 21.62 mm, angle of sliding friction of nuts - from 15.67 to 26.67o, nut weight - from 93.0 to 513.7 mg, coefficient of sliding friction of nuts - from 0.28 to 0.50, seed weight - from 11.0 to 374.8 mg, and ratio of seed weight to nut weight - from 0.08 to 0.88. The majority of nuts contained one seed (average weight of 195.36 mg), and only 2.3% of nuts contained two seeds (average weight of 103.11 mg). The attribute that was most highly correlated with the ratio of seed weight to nut weight was seed weight (0.685), followed by critical transport velocity (0.527) and weight of nuts (0.493). The results indicate that common beech seeds would be processed most effectively in vibration-pneumatic separators or, alternatively, in pneumatic separators where nut fractions obtained with the use of mesh screens can be sorted separately.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2015, 18(1); 5-14
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlations between the Germination Capacity and Selected Attributes of European Larch Seeds (Larix Decidua Mill.)
Autorzy:
Kaliniewicz, Z.
Markowski, P.
Anders, A.
Rawa, T.
Liszewski, A.
Fura, S.
Powiązania:
https://bibliotekanauki.pl/articles/298087.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
modrzew europejski
nasiona
kiełkowanie
właściwości rozdzielcze
European larch
seeds
separation properties
germination
Opis:
The critical transport velocity, basic dimensions (thickness, width and length), the angle of sliding friction and weight of European larch seeds from three batches were determined. The values of shape factors, cross-sectional area, volume and density were calculated for all seeds. The seeds were germinated, and germination time was determined. The investigated attributes were compared by single classification analysis of variance and correlation analysis. The germination capacity of seeds from the same stand varied between harvest years, and germination time was most highly correlated with critical transport velocity and density. The lightest seeds should be separated from the batch to improve germination capacity, and seeds of the heaviest fractions should be used to promote even germination.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2012, 15(2); 229-242
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Shape Factors and Volume Coefficients of Seeds from Selected Coniferous Trees
Autorzy:
Kaliniewicz, Z.
Tylek, P.
Markowski, P.
Anders, A.
Rawa, T.
Zadrożny, M.
Powiązania:
https://bibliotekanauki.pl/articles/298090.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
nasiona
współczynnik kształtu
objętość
bryła geometryczna
seeds
shape factor
volume
geometric shape
Opis:
The thickness, width and length of seeds from selected coniferous trees was measured. The obtained data was used to determine six shape factors (as proposed by Grochowicz, Mohsenin, Donev and Wróbel). The seeds were assigned nine simple geometric shapes, and the total volume of seeds from a given tree species was compared using a pycnometer. Based on the results, a geometric model of seed volume was selected for every analyzed species. It was concluded that the shape of seeds from coniferous trees can be described with the application of shape factors proposed by Mohsenin, Donev and Wróbel, used interchangeably or collectively. The volume of seeds from coniferous trees can be modeled with the use of an ellipsoid for Scots pine, European black pine, Norway spruce and English yew seeds, and a double right quadrangular pyramid for silver fir and Douglas-fir seeds.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2012, 15(2); 217-228
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of the age of Scots pine (Pinus sylvestris L.) stands on the physical properties of seeds and the operating parameters of cleaning machines
Autorzy:
Kaliniewicz, Z.
Rawa, T.
Tylek, P.
Markowski, P.
Anders, A.
Fura, S.
Powiązania:
https://bibliotekanauki.pl/articles/298461.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
Scots pine
seeds
physical properties
correlations
Opis:
Critical transport velocity, the thickness, width, length, the angle of sliding friction and weight of Scots pine seeds harvested from conservation seed stands were measured. Correlations were determined between the age of parent stands (124 to 180 years old) and the above parameters of Scots pine seeds. Significant correlations were found between the age of parents stands and the weight, dimensions and the angle of sliding friction of seeds. Such a correlation was not observed for critical transport velocity. The noted correlations were presented as first-order equations which show that among the studied seed properties, average seed weight changed to the highest degree – it decreased by ca. 15% as Scots pine trees grew older.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2013, 16(1); 63-72
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frictional properties of selected seeds
Autorzy:
Kaliniewicz, Z.
Markowski, P.
Anders, A.
Jadwisieńczak, K.
Powiązania:
https://bibliotekanauki.pl/articles/298455.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
physical attributes
coefficient of external friction
relation
Opis:
The thickness, width, length and weight of five seed species (buckwheat, vetch, pea, lupine and faba bean) and their external friction angle were determined on two types of surfaces - steel and rubber. The experiment was performed with the use of a an inclined plane with an adjustable angle of inclination that measures the angle of external friction and the time taken by seeds to travel a given distance, which supports the determination of the coefficient of kinetic friction. The measured parameters were used to calculate arithmetic and geometric mean diameter, aspect ratio and sphericity index. The dimensions, weight and the calculated indicators of the examined seeds did not significantly affect their coefficients of static and kinetic friction or their coefficients of rolling resistance and rolling friction. The studied parameters were largely influenced by the type of friction surface, and significantly lower average values were reported for steel than rubber. In the studied seed species, the static friction coefficient was determined in the range of 0.187 to 0.582, kinetic friction coefficient - 0.134 to 0.479, rolling resistance coefficient - 0.148 to 0.529 and rolling friction coefficient - 0.29 to 1.80 mm.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2015, 18(2); 85-101
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Próba określenia wpływu śladu kół ciągnika na równomierność siewu nasion żyta
An attempt to determine impact of tractor wheels track on irregularity of rye seeds sowing
Autorzy:
Markowski, P.
Anders, A.
Kaliniewicz, Z.
Choszcz, D.
Kolankowska, E.
Zarajczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/287755.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
nierównomierność podłużna wysiewu
nasiona
żyto
siew
redlica
siewnik
longitudinal irregularity of sowing
rye
seeds
sowing
coulters
seeder
Opis:
Badano wpływ położenia redlic na belce redlicznej siewnika względem śladu kół napędowych ciągnika, przy stosowanej w badaniach różnej prędkości roboczej agregatu siewnego (od 4 do 12 km·h-1) i zmienianej ilości wysiewu nasion (w zakresie od 130 do 170 kg·ha-1), na nierównomierność podłużną wysiewu nasion żyta odmiany Bojko mechanicznymi siewnikami rzędowymi z redlicami stopkowymi. W badaniach polowych stosowano siewnik SZK 1,5H-151 Kaszub i siewnik Amazone D7. Średnia nierównomierność wysiewu nasion żyta siewnikiem SZK 1,5H-151 Kaszub była nieznacznie większa od wartości dopuszczalnej, podanej w PN-84/R-55050, i wyniosła 0,47. W przypadku drugiego siewnika Amazone D7 wartość wskaźnika nierównomierności wysiewu była wyższa i wyniosła 0,52. Z analizy wariancji wynika, że z dwóch zastosowanych agregatów siewnych tylko w jednym, siewniku Amazone D7, wykazano słaby, aczkolwiek istotny wpływ (α=0,05) położenia redlic względem śladu kół ciągnika na nierównomierność podłużną wysiewu nasion żyta.
Impact of coulters location on a coulter beam of a seeder towards the track of drive wheels of a tractor at the varied working speed of a sowing aggregate applied in the research (from 4 to 12 km·h-1) and variable amount of seeding (within the range 130 to 170 kg·ha-1) on the longitudinal irregularity of rye seeds of Bojko cultivar sowing with mechanical seed drills equipped with hoe coulters. SZK 1.5 H-151 Kaszub and Amozone D7 seeder were used in the field research. Average irregularity of rye seeds sowing with seeder SZK 1.5H-151 Kaszub was slightly higher than the limit value set forth in PN-84/R-55050 and was 0.47. In case of the second seeder Amazone D7 value of the irregularity index of sowing was higher and amounted to 0.52. According to the analysis of variance, out of two applied sowing aggregates only in one, Amazone D7 seeder, a weak, but significant impact (α=0.05) of coulters location towards the track of tractor wheels, on longitudinal irregularity of rye seeds sowing was reported.
Źródło:
Inżynieria Rolnicza; 2013, R. 17, nr 3, t. 1, 3, t. 1; 223-231
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of working parameters of the pin sowing unit and sowing parameters on the regularity of dosing oats seeds
Wpływ parametrów roboczych kołeczkowego zespołu wysiewającego oraz parametrów siewu na równomierność dozowania nasion owsa
Autorzy:
Markowski, P.
Rawa, T.
Anders, A.
Bagiński, P.
Powiązania:
https://bibliotekanauki.pl/articles/93864.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
pin sowing unit
seeds
oat
regularity of dosing
kołeczkowy zespół wysiewający
nasiona
owies
równomierność dozowania
Opis:
The paper presents the research results concerning the impact of rotational speed of a sowing shaft (4-34 rot·min-1), width of a sowing opening (1-5 mm) in a pin sowing unit and width of interrows (7-15 cm) and sowing speed (4-12 km·h-1) on the regularity of dosing Flämingsprof oat seeds at the fixed amount of sowing 156 kg·ha-1, which results from the accepted, recommended stock density of 400 seeds·m-2. Tests were carried out on the laboratory stand in two stages. In the first one, measurements related to determination of the performance characteristic of the tested sowing unit was carried out, in the second one, measurements related to determination of the longitudinal irregularity index of seeds sowing was performed. It was proved that from among the investigated factors, regularity of dosing seeds has significant impact (α=0.05) on the width of interrows, rotational speed of the sowing shaft and the width of the sowing opening. From analysis of regression of many variables with stepwise procedure of elimination of non-significant variables, a second degree equation was obtained, which included independent variables - the width of interrows and the width of the sowing opening. The value of irregularity index of seeds sowing at the change of interrows width from 7 to 15 cm decreased by approx. 35% – from value 0.72 to 0.46.
W pracy przedstawiono wyniki badań dotyczące wpływu prędkości obrotowej wałka wysiewającego (4-34 obr·min-1), szerokości szczeliny wysiewającej (1-5 mm) w kołeczkowym zespole wysiewającym oraz szerokości międzyrzędzi (7-15 cm) i prędkości siewu (4-12 km·h-1) na równomierność dozowania nasion owsa odmiany Flämingsprof przy stałej ilości wysiewu 156 kg·ha-1, wynikającej z przyjętej, zalecanej obsady 400 nasion·m-2. Badania przeprowadzono na stanowisku laboratoryjnym w dwóch etapach. W pierwszym wykonano pomiary związane z wyznaczeniem charakterystyki wydajnościowej badanego zespołu wysiewającego, w drugim przeprowadzono pomiary związane z wyznaczeniem wskaźnika nierównomierności podłużnej wysiewu nasion. Wykazano, że spośród badanych czynników istotny wpływ (α=0,05) na równomierność dozowania nasion, ma szerokość międzyrzędzi, prędkość obrotowa wałka wysiewającego oraz szerokość szczeliny wysiewającej. Z analizy regresji wielu zmiennych z krokową procedurą eliminacji zmiennych nieistotnych otrzymano równanie stopnia drugiego, zawierające dwie zmienne niezależne – szerokość międzyrzędzi i szerokość szczeliny wysiewającej. Wartość wskaźnika nierównomierności wysiewu nasion przy zmianie szerokości międzyrzędzi z 7 na 15 cm zmniejszyła się o ok. 35% – z wartości 0,72 do 0,46.
Źródło:
Agricultural Engineering; 2014, 18, 2; 113-123
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przechowywanie nasion rzepaku : zagrożenia
Storage of rapeseed : the risks
Autorzy:
Rusinek, R.
Tys, J.
Wroniak, M.
Anders, A.
Powiązania:
https://bibliotekanauki.pl/articles/311529.pdf
Data publikacji:
2011
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
rzepak
nasiona
biopaliwa
rape
seeds
biofuels
Opis:
Pozyskiwanie oleju z roślin oleistych na cele biopaliwowe w głównej mierze opiera się na nasionach rzepaku. W większości przypadków dotyczy to małych tłoczni farmerskich produkujących olej na potrzeby kilku lub kilkunastu odbiorców. Tłoczenie oleju zazwyczaj odbywa się metodą tradycyjną w tłoczniach ślimakowych, których wydajność wynosi na ogół kilkadziesiąt litrów na godzinę pracy tłoczni. Zatem rzepak przed procesem tłoczenia musi być przechowywany. W trakcie procesu przechowywania nasiona narażone są na utratę jakości, czy to na skutek działania zewnętrznych czynników atmosferycznych, czy też błędów popełnionych w trakcie realizacji procesu. Niniejsze opracowanie zawiera opis głównych zagrożeń związanych z przechowywaniem nasion rzepaku.
An expression of oil from oilseeds is generally based on rapeseed. In most cases this applies to small mills producing oil for a few or several recipients. Expression of oil is usually held in a traditional screw press, whose performance is low. Therefore rapeseed before the process of expression must be storage. In the process of storing of seeds are vulnerable to loss of quality, whether as a result of external weathering or mistakes made during the implementation of process. This paper describes the main risks associated with the storage of rapeseed.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2011, 12, 10; 369-374
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wybranych czynników na głębokość siewu nasion żyta siewnikami rzędowymi
Influence of the selected factors on the depth of sowing of rye seeds with seed drills
Autorzy:
Markowski, P.
Zawojek, Ł.
Rawa, T.
Kaliniewicz, Z.
Anders, A.
Powiązania:
https://bibliotekanauki.pl/articles/288263.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
regulacja głębokości siewu
głębokość siewu
nasiona
żyto
siew
siewnik
regulation of sowing depth
sowing depth
rye
seeds
sowing
seeder
Opis:
Badano wpływ prędkości roboczej agregatu siewnego (w zakresie od 4 do 12 km*h-1) i położenia redlic względem śladu kół napędowych ciągnika na nierównomierność głębokości siewu nasion żyta odmiany Bojko mechanicznymi siewnikami rzędowymi z redlicami stopkowymi. W badaniach polowych stosowano siewnik SZK 1,5H-151 Kaszub i siewnik Amazone D7. Z analizy wariancji wynika, że istotny wpływ (α=0,05) na głębokość siewu nasion żyta obydwoma siewnikami mają zarówno prędkość robocza agregatu, jak i położenie redlic względem kół napędowych ciągnika. Średnia głębokość siewu nasion żyta siewnikiem Amazone D7 ze sprężynową regulacją nacisku redlic na glebę była nieznacznie mniejsza od wartości nastawionej (30 mm) i wyniosła 28,4 mm, w przypadku drugiego siewnika SZK 1,5H-151 Kaszub z regulacją wartości nacisku redlic za pomocą obciążników średnia głębokość siewu wyniosła 38,7 mm. Uzyskane wyniki świadczą o małej przydatności regulacji głębokości siewu w siewnikach rzędowych za pomocą obciążników zawieszanych na dźwigniach redlicznych.
Influence of the operational speed of the seed aggregate (within 4 to 12 km*h-1) and location of coulters towards the track of drive wheels of a tractor on irregularity of the depth of sowing rye seeds of Bojko variety with mechanical seed drills with hoe coulters. SZK 1.5 H-151 Kaszub and Amozone D7 seeder were used in the field research. The analysis of variance proves that both the operational speed of the aggregate as well as the location of coulters towards drive wheels of a tractor significantly influence the depth of sowing of rye seeds with both seeders. Average depth of sowing rye seeds with Amazone D7 seeder with spring regulation of coulters pressure on soil was slightly lower than the set value (30mm) and was 28.4 mm, in case of the second seeder SZK 1.5H-151 Kaszub with regulation of coulters pressure with sinkers, the average depth of sowing was 38.7 mm. The obtained results prove a little usefulness of the regulation of the sowing depth in seed drills with sinkers placed on coulter levels.
Źródło:
Inżynieria Rolnicza; 2012, R. 16, nr 3, 3; 127-137
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wieku drzewostanu macierzystego na wybrane cechy fizyczne nasion świerka pospolitego
Influence of the age of parent stand on selected physical properties of Norway spruce seeds
Autorzy:
Kaliniewicz, Z.
Markowski, P.
Anders, A.
Tylek, P.
Krzysiak, Z.
Fura, S.
Powiązania:
https://bibliotekanauki.pl/articles/987167.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
drzewostany mateczne
wiek drzewostanu
wiek drzew
swierk pospolity
Picea abies
nasiona
cechy fizyczne
sortowanie
tree age
seeds
properties
variation
correlation
sorting
picea abies
Opis:
The objective of this study was to determine the influence of the age of parent tree stand on selected physical properties of Norway spruce seeds to improve the efficiency of seed separation processes. Seeds were harvested in a forest complex located in the seed zone No. 202, in the municipality of Kruklanki in the Borki Forest District (N Poland) during mast years (1999, 2004, 2007 and 2012). The experimental material comprised of Norway spruce seeds from three differently aged tree stands (86, 119 and 129 years old in the first harvest year). The following measurements were performed for each seed: terminal velocity – with a pneumatic classifier; length and width – with a laboratory microscope; thickness – with a thickness gauge; angle of external friction – on an inclined plane, in two positions on a steel friction plate, and mass – with a laboratory scale. The results were used to calculate the arithmetic and geometric mean diameters, aspect ratio, sphericity index and density of seeds. The values of the analyzed properties were compared with ANOVA for factorial designs and linear correlation analysis. The results of the study indicate that Norway spruce seeds obtained from cones harvested in 2012 are characterized by the highest thickness and, consequently, by the highest values of the aspect ratio and sphericity index. The age of parent trees significantly influences the majority of physical properties of seeds. However, the patterns of observed changes are difficult to interpret due to the impact of weather conditions and the genetic potential of parent trees, which perform differently in response to changing climate and geomorphological conditions. Over the analyzed 13−year period a gradual increase was noted in the width, geometric mean diameter, aspect ratio and sphericity index of seeds, whereas the length and density of seeds decreased. Therefore, Norway spruce seeds should be separated mostly with the use of mesh screens with longitudinal openings, pneumatic separators and graders. The use of those devices, separately or in combination, for sorting Norway spruce seeds into mass fractions could contribute to more uniform seedling emergence when every seed fraction is sown separately.
Źródło:
Sylwan; 2017, 161, 07; 548-557
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of correlations between selected physical properties and color of scots pine (Pinus sylvestris L.) seeds
Autorzy:
Kaliniewicz, Z.
Tylek, P.
Markowski, P.
Anders, A.
Rawa, T.
Głażewska, E.
Powiązania:
https://bibliotekanauki.pl/articles/298468.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
pine
seed
physical attributes
color
correlation
Opis:
Selected physical properties of Scots pine seeds harvested from five plantations in north-eastern Poland were determined. Seed color was determined in a sensory analysis, and seeds were classified into one of four color groups: black, brown, gray or other. The results of measurements were used to calculate indicators of seed weight and seeds’ frictional and geometric properties. Physical attributes and indicators were compared by one-way analysis of variance, correlation analysis and linear regression analysis. The average values of physical properties and indicators characterizing seeds from different color groups were determined at: critical transport velocity - from 7.0 to 7.1 m • s-1, thickness - from 1.48 to 1.50 mm, width - from 2.51 to 2.54 mm, length - from 4.32 to 4.46 mm, angle of sliding friction - from 29.1 to 29.8o, weight - from 6.4 to 6.7 mg, coefficient of sliding friction - from 0.56 to 0.58, arithmetic mean diameter - from 2.77 to 2.82 mm, geometric mean diameter - from 2.52 to 2.55 mm, aspect ratio - from 56.91 to 58.64%, sphericity index - from 57.44 to 58.69%, specific weight - from 2.51 to 2.60 g • m-1, volume - from 7.90 to 8.24 mm3 and density - from 0.80 to 0.82 g • cm-3. Selected color groups differed only in length, aspect ratio and sphericity index. Seed weight was most highly correlated with the remaining attributes, and the highest value of the correlation coefficient and the equation with the highest value of the coefficient of determination were reported for the correlation between seed weight and thickness.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2014, 17(3); 259-274
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected physical parameters of common hornbeam (Carpinus betulus L.) nuts
Autorzy:
Kaliniewicz, Z.
Tylek, P.
Markowski, P.
Anders, A.
Rawa, T.
Liedtke, M.
Powiązania:
https://bibliotekanauki.pl/articles/298164.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
common hornbeam
seeds
physical parameters
range of variations
correlation
separation
Opis:
Selected physical parameters of common hornbeam nuts were determined in five batches of nuts harvested from seed tree stands in northern Poland. The results were used to calculate the arithmetic and geometric mean diameters, aspect ratio, sphericity index, volume and density of each nut. The above parameters were compared by analysis of variance, correlation analysis and linear regression analysis. Habitat conditions had a greater influence on nut plumpness than the age of the tree stand. Nut width was highly correlated with nut mass, and the above observation can be used in the process of separating nuts into mass categories. When two mesh screens with 5 mm and 6 mm openings are used, nuts will be separated into a fine-sized fraction containing 71.4% of nuts with reduced plumpness, 24.1% of moderately plump nuts and 1.8% of plump nuts, and a coarse-sized fraction containing 2.0% of nuts with reduced plumpness, 43.6% of moderately plump nuts and 54.4% of plump nuts.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2015, 18(4); 247-259
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Basic physical properties of Norway spruce (Picea abies (L.) Karst.) seeds
Autorzy:
Kaliniewicz, Z.
Markowski, P.
Anders, A.
Jadwisieńczak, B.
Rawa, T.
Szczechowicz, D.
Powiązania:
https://bibliotekanauki.pl/articles/298166.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
seed
dimension
seed mass
range of variations
correlation
separation
Opis:
The range of variations in a given separation parameter and its relationships with other attributes have to be determined for designing seed cleaning and sorting processes. In this study, those relationships were determined for five batches of Norway spruce seeds supplied by a seed extraction plant in Jedwabno. The seeds were harvested from seed stands in northern Poland. The terminal velocity, length, width, thickness and mass of every seed were determined. The results were used to calculate the geometric mean diameter, aspect ratio, sphericity index and density of the evaluated seeds. Those parameters were compared by analysis of variance and linear correlation analysis. Similarities in the average values of all physical properties were noted only between seeds harvested in the same seed zone, from tree stands occupying the same habitat type. The analyzed seeds can be effectively separated into mass fractions with the use of traditional sorting devices such as pneumatic separators, mesh sieves with longitudinal or round openings, cylindrical graders, winnowing machines and pneumatic sieves, in order to achieve more uniform seedling emergence when each seed fraction is sown separately.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2016, 19(2); 103-115
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł

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