The purpose of the research was to characterize the variability of relative air humidity in the growing season in the vicinity of Bydgoszcz in the years 1985-2010. The study was based on measurements taken from a representative meteorological station located within the Airport Bydgoszcz-Szwederowo. Standardized air humidity measurements were carried out in a thermometer shelter, by Assmann psychrometer at the height of 2 m above the ground, on the plateau, about 3.5 km from the city center. The study investigated the nature and scope of changes in mean relative humidity by calculating selected elements of descriptive statistics. Based on the linear function of Regression analysis we determined direction of changes and specified the ratio with time of analyzed indicator. The average relative air humidity in the Bydgoszcz vicinity, especially in the spring and summer months, was characterized by a large temporal variability, appropriate to moderate and transitional climate in Poland. The variability of the analyzed indicator in multi-year period 1985-2010 was not statistically confirmed. It was found a temporary widening of variation in 5 of the 7 examined cases in period 1998-2010 compared to the previous period 1985-1997. ...
The aim of this study was to evaluate the effects and interaction of irrigation and nitrogen fertilization on the shape of the quantity and quality of grain yield of malting barley cultivar 'Signora' cultivated on sandy soil with the concise undersoil. Field experiment was carried out in the years 2013-2014 on the experimental field of the Department of Land Reclamation and Agrometeorology UTP, located in Mochełek near Bydgoszcz. During the study period there were average needs of irrigation in barley, mainly due to the uneven distribution of rainfall in the studied growing seasons. Seasonal irrigation dose averaged 72.5 mm. The research focused on grain quality that affects its suitability for malting. It was found that irrigation resulted in a significant increase in grain yield, although the effectiveness of this treatment per unit was lower than those achieved in previous experiments with other cultivars. Barley grain derived from irrigated plots contained significantly less protein and had better indicators of malting, compared to the grains of plants not irrigated. The optimal dose of nitrogen in both the irrigation conditions and the non-irrigated was 30 kg.ha-1. Admittedly, application of top-dressing (variant N3) significantly increased the yield, especially within irrigation variants, but the grain ...
The aim of the the research was to confirm the need for irrigation as the main yielding treatment in corn production on a very light soil with permeable subsoil in the area of distinct water deficits, and determining the effectiveness of nitrogen fertigation, compared with broadcast application method. Accurate field experiment was carried out in 2008-2010 on the experimental field of the Department of Land Reclamation and Agrometeorology of the University of Science and Technology in Kruszyn Krajeński near Bydgoszcz. During the study period occurred large irrigation needs in corn production, due to insufficient and uneven distribution of rainfall in the particular growing seasons. Seasonal irrigation dose averaged 194 mm.Obtained results showed that the cultivation of corn for grain in the area of distinct water deficits is purposeful only under the irrigation conditions. For non-irrigated variants the yield of dry matter of grain was only 0.87t.ha-1 and did not exceed in any year of the research the level of 1.0 t.ha-1. Under irrigation corn yielded on average 6.55 t of grain dry matter from 1 ha. A worth recommending irrigation system in corn production for grain is dripping system, in which effect of production per unit was higher than effects ...
