Fig 2 - uploaded by Krzysztof Bartoszek
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Scatter plot with a line of exponential function showing the relationship between rapeseed overwintering rates and the number of days with soil temperature ≤ –3°C at a depth of 5 cm in winter (n = 35)
Source publication
The relationship between weather conditions and winter rapeseed overwintering was based on meteorological data and field observations from the Experimental Station for Cultivar Testing (COBORU) in Bezek near Chelm in period 1974/75-2008/09. Coefficients of correlation and determination were determined and tested for significance by using the Pearso...
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Nowadays, it is necessary to develop new native resources of raw materials for producing consumer goods, in particular, pulp and paper, because of the increased demand for pulp for papermaking and the shortage of wood. In this study, rapeseed straw was studied in order to evaluate it as pulping raw material. Laboratory experiments were carried out...
Citations
... Niekorzystnie na stan przezimowania omawianej rośliny wpływa długi okres z niskimi wartościami temperatury powietrza (< -10°C), przy jednoczesnym braku pokrywy śnieżnej. Najbardziej wrażliwy na oddziaływanie ujemnej temperatury jest korzeń rzepaku, dlatego też największe uszkodzenia mrozowe na plantacjach tej rośliny obserwuje się po zimach, w których wartości temperatury gleby na głębokości 5 cm spadały poniżej -3ºC i utrzymywały się przez 15 dni lub dłużej [Bartoszek 2013]. W ostatnich dziesięcioleciach tego rodzaju ekstremalne warunki termiczne, przyczyniające się do likwidacji upraw tej rośliny po zimie, wystąpiły na obszarze Lubelszczyzny w latach 1978/79, 1981/82, 1984/85, 1995/96, 1996/97 i 2002/03. ...
The aim of the study is to determine the influence of atmospheric circulation on the condition of rapeseed plants after overwintering in the Lublin Region. Results of observation of rapeseed plants after each winter from 1974/75 to 2009/10 came from COBORU experimental stations in Bezek and Cicibór Duży. The relationships between atmospheric circulation and overwintering rates were analyzed on the basis of values of the NAO index, OWPs and OWPp indices (East Poland Zonal and Meridional Oscillation), zonal, meridional and cyclonical indices and frequency of circulation types over the Lublin Region from December to March. It was found that the condition of rapeseed plants after winter was most significantly affected by atmospheric circulation conditions in December. The greatest losses in rapeseed plantations were reported when a high frequency of easterly and south-easterly airflow along with a low frequency of westerly airflow was noticed. The adverse effect was also caused by a higher incidence of anticyclonic days, especially in February and March.
The impact of weather conditions on selected botanical and agricultural characteristics of winter rapeseed. The relationship between weather conditions and the rate of plant emergence of winter rapeseed and plant height (before winter and after flowering) was studied based on meteorological data and field observations from the Experimental Stations for Cultivar Testing (COBORU) in Bezek near Chełm in the period from 1974/75 to 2008/09. Poor emergence were recorded in year when the number of very hot days in July and August were higher than the average. Higher than normal sum of precipitation in August in connection with warm and relatively dry autumn favored high plant height before winter. In turn, the rapeseed plant height after flowering was strongly negatively associated with low soil temperature and the long persistence of snow cover at the end of winter.
