The paper presents the results obtained from field experiments conducted in 2002-2003. They evaluated the effect of irrigation and fertilizationof cherry on the yield and mineral content of some macro-and micronutrients in the soil.Years in which the study was conducted were varied in terms of rainfall-thermal conditions. The growing season in 2002 was characterized by a moderate amount of precipitation and air temperature,while the year2003 was clearly dry and warm. In the study of fruit crops increased under the influence of irrigation, an average of 2.5 kg in terms of a single tree. Similarly, applied fertilizer increased yields of cherries, but the biggest influence was spreading at 1NPK. Under the influence of a higher dose 2NPK fertilization, fruit yield has not increased. Agrotechnical used modified the soil chemcal properties. The most affected was N in the layer of topsoil and under. ...
The paper presents an assessment of the effect of under-crown irrigation on the yield of Fuji Kiki apple trees, in the third year of fruiting in the vegetation period of 2014. Sum of rainfalls during the vegetation period of 2014 was higher than mean rainfalls in the period of 90 mm. Dry spells in the analyzed vegetation period were longer, it was necessary to use a supplementary irrigation (total dose of water - 80 mm). On the basic of obtained results it was found that increase in apple trees yield was higher by 1,8 ·t∙ha-1 in comparison with the yield unirrigated plants. ...
The study of drip fertigation of winter squash ‘Gomez' was conducted on the very light soil on the experimental field in Kruszyn Krajeński near Bydgoszcz in the years 2007 and 2008. The research was established as one-factorial, using the method of drawn blocks, in four replications. Drip fertigation (DF) as the liquid fertilization supplied nitrogen, potassium and phosphorus to the plants three times during growing season. As the control (DP), the drip irrigation combined with broadcast application was used. The potassium and phosphorus fertilization of control plots was applied before seed sawing. The nitrogen fertilization of control plots was provided in three single doses during vegetation. The liquid and powder fertilizations were performed at the same time. The complex fertilizer 'Universol Blue' (N:P:K = 18:11:18) was used. The dose of fertilizer was 3:2:3 (187.5:125:187.5 kg of NPK per ha). The irrigation was conducted using the drip line 'T-Tape'. The liquid fertilizer was mixed by the 'Dosatron' dispenser. The irrigation started when the soil water pressure, measured with the tensiometers, was near -0.04 MPa. In comparison to the control (powder fertilization), the drip fertigation (liquid fertilization) significantly increased marketable fruit yield, single fruit weight and fruit number. Most of the tested ...
The aim of the study was to determine the effect of drip irrigation on yielding of summer squash ‘White Bush' grown under conditions of two localities: Lipnik near Stargard Szczeciński (soil of quality class IVb, and of good-rye-soil-complex) and Kruszyn Krajeński near Bydgoszcz (soil of quality class V, and of weak-rye-soil-complex). The study was designed as one-factorial trial: drip irrigation as the experimental factor was considered. Drip irrigation was conducted according to soil tensiometer indications (-0.04 MPa). Both, in Lipnik as well as in Kruszyn Krajeński, drip irrigation significantly increased marketable yield of summer squash ‘White Bush'. A higher rise in yields due to irrigation was obtained in Kruszyn Krajeński than in Lipnik. Mean marketable yield of summer squash fruits in Lipnik was higher than that obtained in Kruszyn Krajeński. Drip irrigation significantly increased the single fruit weight in relation to the control, in both crop localities. The system of drip irrigation significantly affected the number of fruits per plant. Summer squash plants grown in Lipnik produced higher number of fruits, than in Kruszyn Krajeński. In addition, essential influence of drip irrigation was affirmed on chemical composition of fruits, i.e. dry matter, vitamin C, monosaccharides, saccharose, content of total sugars ...
