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Pozycja Brak dostępu Fizjologia roślin : przewodnik do ćwiczeń(Wydawnictwo Akademii Rolniczej w Szczecinie, 2002) Gregorczyk, Andrzej; Marska, Elżbieta; Mikiciuk, Małgorzata; Wróbel, Jacek; Akademia Rolnicza w Szczecinie; Akademia Rolnicza w Szczecinie; Akademia Rolnicza w Szczecinie; Akademia Rolnicza w SzczeciniePozycja Open Access Ocena modelu reakcji i rzędu do opisu degradacji linuronu w glebie(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2013) Gregorczyk, Andrzej; Swarcewicz, Maria; Sędłak, Paweł; Katedra Agronomii, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Zakład Syntezy Organicznej i Technologii Leków, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Inżynierii Systemów Agrotechnicznych, Zachodniopomorski Uniwersytet Technologiczny w SzczecinieThe aim of this study was to apply the single first-order kinetic model (SFO) to the investigation of linuron degradation (pure and in the mixture with other pesticides – thiametoxam and mancozeb) in light and medium soil. Coefficients of the exponential model were determined – after logarithmic transformation – from the least squares linear regression. The single first-order reaction kinetic model turned out to be applicable to the degradation of linuron in soil (determination coefficient R2 ≥ 92.7%). In light soil, the rate of degradation was higher comparing to medium soil. The T50 values (half-life time) amounted to 36.1–49.2 days for the herbicide alone and ranged from 71.5 to 73.5 days for linuron in the mixture. Regardless of the type of soil, linuron in the mixture degraded much slower than the pure herbicide.Pozycja Open Access Ocena niepewności obliczenia czasu półtrwania herbicydu w glebie(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2012) Gregorczyk, Andrzej; Swarcewicz, Maria Katarzyna; Katedra Agronomii, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Zakład Syntezy Organicznej i Technologii Leków, Zachodniopomorski Uniwersytet Technologiczny w SzczecinieThe object of this study was the kinetics of disappearance of linuron in soil, under laboratory conditions. Compared two methods of indirect determination of half life time and estimation accuracy of the calculations. These were the analytical method (for example, a simple first-order reaction model) and the graphical method (assuming a linear decay of the active substance). According to the current international standards assume that a measure of uncertainty of measurement was the double value of standard deviation. Calculated expanded uncertainty of measurement of the absolute half period and the relative uncertainty. Depending on the method used was different, but similar half-life values (36.1 and 37.3 days). It was found that the analytical method was more accurate (relative uncertainty 3.0%) than the graphics (uncertainty 4.8%).Pozycja Open Access Ocena zawartości metali ciężkich oraz cech jakościowych ziarna pszenicy(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2010) Stolarska, Anna; Gregorczyk, Andrzej; Przybulewska, Krystyna; Podlasińska, Joanna; Zakład Fizjologii Roślin, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Agronomii, Zakład Doświadczalnictwa, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Zakład Biotechnologii i Mikrobiologii Środowiska, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Ochrony i Kształtowania Środowiska, Zachodniopomorski Uniwersytet Technologiczny w SzczecinieThe degree of heavy metal contamination and effect of storage time of wheat grain on quality traits of milling, used for five type of flour production. The content and weakening of gluten and falling number was estimated. It was noticed, that concentration of heavy metals did not exceed values admissible for consumption flour. Gluten quality for every grades of flour was good and did not decrease during the storage time. After longer storage time increase of falling number was observed.Pozycja Open Access Porównanie ocen zawartości chlorofilu chlorofilometrami SPAD-502 i N-tester(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2009) Pacewicz, Krzysztof; Gregorczyk, Andrzej; Katedra Uprawy Roli, Roślin i Doświadczalnictwa, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Uprawy Roli, Roślin i Doświadczalnictwa, Zachodniopomorski Uniwersytet Technologiczny w SzczecinieThe present study was the determination the correlation between values of two chlorophyll meters: SPAD-502 and N-tester, indulging in comparison scientific results with these two different devices. To this purpose, the six kinds of cereals in stage of heading were examined on “index of greenest”: oat, barley Rataj and Nagrad, triticale, wheat and rye. Statistical analysis carried out afterwards demonstrated that, between measurements received from two chlorophyll meter founded high efficiency of linear regression. To recount values between the chlorophyll meters can be use equation: (N-tester reading) = 14.5·(SPAD reading) – 73.4.Pozycja Open Access Porównanie wybranych kinetycznych modeli zanikania herbicydów w glebie(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2012) Gregorczyk, Andrzej; Swarcewicz, Maria; Katedra Agronomii, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Zakład Syntezy Organicznej i Technologii Leków, Zachodniopomorski Uniwersytet Technologiczny w SzczecinieThe aim of the paper was to used of three types of mathematical function: the single first-order degradation kinetics (SFO), Gustafson and Holden model (FOMC) and the simple linear bi-phase model, for quantification of the fate of pesticides in soil. For instance data from laboratory study of dissipation of atrazine in soil was used. Numerical methods using for estimate of structural coefficients of degradation models of this herbicide. For every models assessed the values of 50, 90 and 100% dissipation time of substance active. Mathematical equations and figures of first derivative of functions were presented as the analysis of atrazine degradation process. Accomplishment of estimate adequately of using models. To the last degree of the kinetics criterions of degradation of substance active and the statistics criterions make good the Gustafson and Holden model. In this work find that analysis of degradation rate is valuable of study integration of kinetics degradation herbicides in soil.Pozycja Open Access Reakcja siewek pszenżyta ozimego na zróżnicowane natężenie oświetlenia i podwyższone stężenie CO2(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2010) Brzóstowicz, Aleksander; Gregorczyk, Andrzej; Katedra Agronomii, Zakład Doświadczalnictwa, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie ul. Papieża Pawła VI 3, 71–459 Szczecin; Katedra Fizyki i Agrofizyki, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie ul. Papieża Pawła VI 3, 71–459 SzczecinBiometric measurement and index of greenness of winter triticale seedlings cv. Prado were made after 14 days of growth in controlled conditions. Two levels of photosynthetic photon flux density (PPFD): 400 i 800 Dmol · m–2 · s–1 were set as well as four levels of CO2 concentration: 400 (control), 800, 1200, 1600 Dmol · mol–1. Stimulating effect of higher lever of CO2 concentration on seedlings has been established (to control). Favorable impact of lighting intensity (PPFD) 800 Dmol · m–2 · s–1 and concentration of CO2 800 Dmol · mol–1 on biometric features of analyzed seedlings has been shown.Pozycja Open Access Wpływ kadmu na kinetykę wzrostu roślin owsa(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2010) Gregorczyk, Andrzej; Gawska, Agnieszka; Stolarska, Anna; Katedra Agronomii, Zakład Doświadczalnictwa, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Fizjologii Roślin, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Fizjologii Roślin, Zachodniopomorski Uniwersytet Technologiczny w SzczecinieThe goal of the study was the assessment of the elongation growth of the naked oat var. 'Akt' to the contents of the toxic dosage of cadmium. Cadmium in toxically doses 20 and 100 mg per 1 kg of the soil and the control variant (0 mg Cd per 1 kg of the soil) were used in the pot experiment. The kinetics of plant elongation growth was analysed by means of a logistic function. The coefficients of logistic model have been estimated numerically by means of the Levenberg-Marquardt method. The applied dose of cadmium 20 mg · kg–1 of the soil did not significantly limited the elongation growth of the oak plants. The cadmium dose of 100 mg · kg–1 in the soil had an adverse influence on the growth as a result the stage of the maximum growth speed was about 10 days delayed in comparison to the control variant and the final height of plants was significantly limited.Pozycja Open Access Wykorzystanie biomasy rdestowca ostrokończystego (Polygonum cuspidatum Siebold & Zucc.) do celów energetycznych(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2012) Gregorczyk, Andrzej; Wereszczaka, Jacek; Stankowski, Sławomir; Katedra Agronomii, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Agronomii, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Agronomii, Zachodniopomorski Uniwersytet Technologiczny w SzczecinieIn the field experiment conducted in 2006–2008 years, the influence of harvest number (one or two) and levels of nitrogen initial fertilization: (25, 50, 75, 100 kg N · ha–1 ) on dry matter, calorific value, and ash of the Japanese knotweed plants was estimated. The energetic effectiveness index was calculated, also. Application of initial nitrogen doses had no significant effect on final dry matter yields of plants. Planning multi-year utilization of knotweed as a renewable source of energy one harvest during autumn- winter time seemed to be best. High biomass yields of Japanese knotweed (mean 9.84 t · ha–1) and great calorific value (16–17 MJ · kg–1), indicate that is a possibility for utilization this plant as an energetic plant (Ee = 8.27).Pozycja Open Access Zastosowanie analizy harmonicznej do badania zmian temperatury powietrza w Szczecinie w cyklu rocznym(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2011) Gregorczyk, Andrzej; Michalska, Bożena; Katedra Agronomii, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Meteorologii i Klimatologii, Zachodniopomorski Uniwersytet Technologiczny w SzczecinieThe aim of the paper was to describe statistically changes of air temperature in the area around Szczecin over the years 1991–2000 and to apply for this purpose a time series of harmonic analysis in the annual cycle. On the basis of the original data, mean values of air temperature in Szczecin in individual months, standard errors and extreme values were shown. The mean air temperature in the studied decade (10 years) amounted to 9.03oC. A high significance of annual periodicity of the studied feature was proved. The mathematical model of temperature changes in the function of a successive day of the year was estimated. Very good matching of the harmonic curve to the real data (determination coefficient R2 = 0.993) was recorded.Pozycja Open Access Zmienność opadów atmosferycznych w Szczecinie w cyklu rocznym w latach 1991–2000(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2011) Gregorczyk, Andrzej; Michalska, Bożena; Katedra Agronomii, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Meteorologii i Klimatologii, Zachodniopomorski Uniwersytet Technologiczny w SzczecinieThe aim of this study was statistical description of the rainfall changes in the vicinity of Szczecin in the years 1991–2000 and approximation of daily rainfall using the harmonic and polynomial functions. On the basis of original data, mean values of monthly rainfall and their standard deviations were shown. Mean annual rainfall amounts (total precipitation) in the studied decade (10 years) equaled 575 mm. The highest mean monthly rainfall was in July (76.3 mm), and the smallest – in October (32.7 mm). From both the mathematical models of daily rainfall as a function of day number of year more adequate was four-order polynomial (determination coefficient R2 = 0.822). There has been attempt to model the distribution of the rainy days number in selected 30-day month using the theoretical binomial distribution.