Two soil profiles at Kruszyn Krajeński near Bydgoszcz were studied at the paper. Characteristic of soils and their water properties were determined. Air temperature (t) values and rainfall amounts (P) in particular months of vegetation period (April–September) in 1997–2006 for the investigated area were given. The vegetation period was characterized by mean air temperature 14,4 °C, ranging in particular years from 13,4 to 15,2 °C. Rainfall total during the vegetation period amounted on average 283,4 mm, ranging from 177,5 to 377 mm. Potential evapotranspiration (Etp) amounts were also determined using Grabarczyk’s formula. Irrigation requirements under the considered soil-climatic conditions were determined according to the following Drupka’s proposal: rainfall total (P) in the vegetation period as well as potential evapotranspiration (Etp) and difference Etp – P. Irrigation is needed when rainfall is lower than 370 mm, Etp is higher than 515 mm, and difference Etp – P is higher than 150 mm. On the base of rainfall amounts in vegetation period it can be stated that in years 1997-2006 irrigation requirements have been occurred in 8 seasons, and in two remaining years irrigation also could be needed because rainfall amounts were slightly higher from 370 mm (only by 4 and 7 ...
The influence of sprinkling irrigation and four nitrogen fertilization doses on the height and quality of grain yield of malting spring barley cultivar Poldek was determined in a field experiment carried out in the years 2006-2008 on light soil at Mochelek, near Bydgoszcz. Total water doses of 90, 30 and 180 mm were used in succeeded vegetation seasons respectively to weather conditions. The sprinkling irrigation of malting barley Poldek significantly increased the grain yield to the average amount of 2,24 t.ha-1 (71,3%). Productive efficiency of applied water was higher comparing to results obtained from domestic experiments car-ried on in the comparable soil conditions. Irrigation also improved the brewery utilization indexes. Grain harvested on irrigated plots have less protein in the contents, higher uniformity and germination capacity than grain harvested as a control. Nitrogen fertilization significantly increased the grain yield but worsened its quality for malting utility. Obtained results indicate that the irrigation is one of the main impacts that provide high and good quality grain yield of malting barley in vegetation seasons characterised by low precipitation which causes dry spells in May, June and July ...
Field experiments was carried in ES Lipnik belonging to Western Pomera-nia University of Technology in Szczecin. Blueberry cv. ‘Patriot’ was cultivated in th years of 2000-2008 on the acid brown soil which is belong to IVb soil class. The soil was characterized by small amount of nutrient availability of phospho-rus and potassium and low acid reaction. Blueberry was cultivated in different water conditions: O-control (without supplemental irrigation), W- irrigated ob-jects. Plants were irrigated using dropping line with efficiency of 2,4 l.h-1 keeping soil moisture on the level of 0,01 MPa, registered by tensiometers. Also in these studies productivity of two and ten years old blueberry plants treated or not with supplemental irrigation were evaluated. Average crop of berries harvested in this experiment equal 7,61 t.ha-1 (tab.3). Yield from not irrigated plots equal only 4,92 t.ha-1. It appeared that sup-plemental irrigation gave proper soil moisture for blueberries and the good yield and the amount of used water particularly in June and July depended on natural precipitation. As effect of supplemental irrigation the average crop of berries equal 5,38 t.ha-1 and was 109,2% bigger comparing to control (without supple-mental irrigation). Productive effect of drip irrigation was in full correlation with amount ...
Field experiments were done in 2002–2004 on sandy soil. Crop productivity of cherry (cv. ‘Kelleris’ i ‘Łutówka’) was tested on different water regime (O – con-trol, W – under-crown- irrigation) and various level of nitrogen doses: 0NPK, 1NPK – 130kg N.ha-1 (40+ 30+60), 2NPK – 260 kg N.ha-1 (80+60+120). The ex-periment was designe by split-plot method in 7 replications. Among the trees was the lawn but in the rows the selective herbicide was used. Irrigation was applied when tensiometer show that potential of soil water was lower than 0,01 MPa. De-pending on rainfall the amount of supplemental irrigation equel 27,5–61,3 mm of water during vegetation period. The paper also presents the results of study on the effect of rainfall and total irrigation rates during vegetation on the content N, P, K,Ca, Mg, sugar, vit. C and dry matter of cherry. The cultivars had similar production capabilities. Irrigation significantly increased the yield, by 1,96 t.ha-1 (36,5%). The highest yield of cherry (6,78 t.ha-1) was obtained from plants, which had been fertilized with 260kg N.ha-1. After three years of the research the content of N, P, Mg, sugar, vitamin C in fruit decreased compare to control plots. Higher mineral fertilization caused ...
The aim of the study was to determine the effect of drip irrigation on yields of summer squash cv. ‘Danka' grown under conditions of the 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 experiments were designer as one-factorial trias. One factor was considered - drip irrigation (control, drip irrigation). Drip irrigation was conducted according to soil tensiometer indications (-0,04 MPa). Drip irrigation - both in Lipnik as well as in Kruszyn Krajeński - significantly increased marketable yields of summer squash ‘Danka'. Higher increases in yields due to irrigation were obtained in Kruszyn Krajeński. Mean marketable yield of summer squash fruits in Lipnik was higher than that obtained in Kruszyn Krajeński. Fruits in Lipnik were characterized by the higher weight as compared to those in Kruszyn Krajeński. Summer squash plants in KruszynKrajeński - irrespective of expe-rimental water treatment - were characterized by the higher number of fruits.
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In 2007-2009, at the Experimental Agricultural Station in Lipnik near Stargard Szczeciński, a field experiment was performed on acid brown soil of the good wheat complex. This soil in the topsoil contained 8.2 g kg-1 of organic C, had a slightly acid reaction and a low contents of available forms of P (30.1 mg kg-1) and K (45 mg kg -1). During the growing season the ground water level re-mained below 3.0 m.The aim of the studies was to compare the yield potentials of corn and two hybrids of sweet sorghum cultivated in conditions of various humidity of the light soil. On the plots with and without drop irrigation, sweet sorghum (the Sucrosorgo-506 and Rona-1 varieties) and corn (the variety Oldham FAO-250), of which the latter was the species compared. The times and doses of irrigation were determined based on indications of soil tensiometers. To the irrigation a dropping line of a capacity of 2.4 l h-1 of water and emitters spaced 30 cm apart was used. The combined doses of water depended on the timing and amount of rain-falls and were: in 2007 - 40 mm, in 2008 - 150 mm, in 2009 - 110 mm. The plant density ...
In the climatic conditions of Poland the temporary lack of rainfall during the vegetation season, influenced on the water deficits in the top soil level. This situation can effect on the height and quality of yields in particular years. There is estimated that in the - so called - Large Valleys Region the water deficiency ranged 200-300 mm. Production of cucurbit's vegetables in open field is strictly connected with thermal-rainfall conditions during the vegetation season. The optimal soil moisture is the very important factor for high and good quality yield. So, the production of the cucurbit plants should be connected with the irrigation installations. The aim of the study was to determine the influence of drip irrigation in cultivation of summer squash ‘Danka' under light soil conditions. The trials were conducted in the years 2004 - 2006 at the experimental field in Kruszyn Krajeński near Bydgoszcz - on a soil of rye weak complex. The plot area for harvest was 9,1 m2. The irrigation rates were done on the base of soil water potential according to tensiometer indications. The irrigation was started when the soil water tension was - 0,04 MPa. The fruits of the summer ...
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 ...
