The purpose of the study conducted in the years 2005–2006 in Kruszyn Krajeński near Bydgoszcz was determining the influence of irrigation and nitrogen fertilization on morphological features of root systems as well as overground parts of millet cultivable varietes Gierczyckie and Jagna including the structure of grain yield. The plants were cultivated on a very light soil. The research shown that irri-gation significantly determined various values of morphological features of over- and undeground parts in each tested varitety of millet, where Jagna variety re-acted better on this experiment factor than Gierczyckie variety. In each variety the mass of overground parts of millet as well as the mass of grain increased more in-tensive in relation to the mass of roots and P2 (ratio of the overground-part mass and roots mass). Each variety used in the experiment reacted positive on nitrogen fertilisation, where, with no irrigation, Gierczyckie variety more effectively use higher nitrogen frtilisation doses (80-120 kg•ha-1), whereas Jagna variety lower doses (40-80 kg•ha-1). Irrigation increases the effectiveness of nitrogen fertilisa-tion for Gierczyckie variety, when nitrogen fertilisation dose reach 40-80 kg•ha-1 and for Jagna variety 40 kg•ha-1. ...
The sprinkling irrigation and varied nitrogen fertilisation of millet cv. Gierczyckie on insects with the hemipteroidal mouthpart occurrence were inves-tigated. The entomological experiments were conducted in 2005 and 2006 in Kruszyn Krajeński near Bydgoszcz. The largest group of insects were Thysanoptera and Hemiptera. When we used the middle rate of nitrogen fertilization, Thysanoptera was significantly less numerous. They preffered the irrigation plants. From Thysanoptera the most ab-undant were Phlaeothripidae. Number of Hemiptera was significantly less than Thysanoptera. When the high rate of nitrogen fertilization was used, the numer of Hemiptera was high, too. They were represented by Cicadellidae, Miridae, Aphi-didae and Delphacidae families. Psammotettix alienus Dahlbom. was the most numerous insects from Cicadellidae. The numbers of Macrosteles laevis Ri-baut and Empoasca pteridis Dahlbom was lower. The most frequently caught of Aphididae were the following insects: Sitobion avenae (F.) H.R.L. and Rhopalo-siphum padi L. The usage of irrigation and varied nitrogen fertilization in millet cultivation, affected on numerous of phytophagous insects such as: Lygus ruguli-pennis Popp. and Trigonotylus coelestialium Kirk. First of theirs preffered irri-gation plants with higher rate of nitrogen fertilization. ...
The objective of the study was the comparison of optimal precipitation and deficits of atmospheric precipitation in relation to millet cultivated in the region of Bydgoszcz and Wrocław in the period 1975-2014. In the region of Wrocław water needs in millet cultivation were larger than in the region of Bydgoszcz. In the growing season (from May to August) they amounted to 253 mm and 242 mm respectively. July was the month when the largest water needs were observed - 74 and 72 mm respectively. It was also discovered that in the region of Wrocław the optimal amount of precipitation in the millet growing season (from May to August) systematically increased in subsequent decades, from 234 mm in the period 1975-1984 to 266 mm in the period 2005-2014. The correlation and regression analysis showed that the increasing trend of changes of that index in time was significant. Monthly deficits of precipitation in the millet growing season - both maximum and average - were in each case larger in the region of Bydgoszcz. The largest maximum and average insufficiencies of precipitation occurred in July. The frequency of occurrence of years with insufficient precipitation was also larger in each month in the region ...
