Institute of Soil Science and Plant Cultivation National Research Institute in Pulawy

Wrocław, Poland

Institute of Soil Science and Plant Cultivation National Research Institute in Pulawy

Wrocław, Poland
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Stanislawska-Glubiak E.,Institute of Soil Science and Plant Cultivation National Research Institute in Pulawy | Korzeniowska J.,Institute of Soil Science and Plant Cultivation National Research Institute in Pulawy
Fresenius Environmental Bulletin | Year: 2010

Suitability of 1 mol HCl extradant for monitoring of soil contamination with Zn, Cu and Ni was examined and compared to that of aqua regia. A micro-plot experiment was conducted, in which soil contamination with the above metals was simulated. For all the three elements, highly significant correlations were obtained between the total Zn, Cu and Ni determined with aqua regia versus the forms extracted with 1 mol HCl. Besides, the concentrations of both forms of Zn, Cu and Ni were highly positively correlated with their content in plants, being negatively correlated with the yields obtained. The results suggest that 1 mol HCl is suitable for observations of phytotoxic contamination of soil with Cu, Zn and Ni. The method used for monitoring purposes until present, which involved application of aqua regia as an extradant, could be replaced by a less laborious and expensive procedure which takes advantage of 1 mol HCl. © by PSP.


Stanislawska-Glubiak E.,Institute of Soil Science and Plant Cultivation National Research Institute in Pulawy | Korzeniowska J.,Institute of Soil Science and Plant Cultivation National Research Institute in Pulawy
Journal of Food, Agriculture and Environment | Year: 2012

A two-year experiment was carried out to compare the content of N, P, K and Mg in dry matter of winter wheat plants grown under one of the three soil tillage systems: conventional tillage with a plough (CT), minimum tillage consisting of loosening the top layer of soil down to 15 cm (MT) and zero tillage (no-tillage), where seeds were sown directly to unploughed soil (NT). Plant samples were collected in 10-day intervals, from the tillering to early flowering stage. In addition, biomass yields were determined for each of the sampling dates as well as yield of grain and straw. The biomass yield and concentration of macronutrients in vegetative parts of winter wheat varied between the two investigation years. However, the soil tillage methods did not differentiate the contents of the examined nutrients in wheat plants, except for P and Mg in the very early growth stages, when the concentration of these elements was higher under NT and MT systems than under CT. Although there were no differences between the soil tillage methods regarding the content of nutrients in wheat plants or the dynamics of nutrient uptake during the growth of plants, the lowest yields were obtained when NT system was applied. This suggests that other factors, apart from the plant nutrition status, were involved in limiting harvests under NT system.


Krzysik M.,Wrocław University | Grajeta H.,Wrocław University | Prescha A.,Wrocław University | Weber R.,Institute of Soil Science and Plant Cultivation National Research Institute in Pulawy
Journal of Trace Elements in Medicine and Biology | Year: 2011

The effects of cellulose, pectin and chromium(III) on lipid and carbohydrate metabolism were investigated in rats. Eighty male Buffalo rats (n= 10/group, 4 weeks old) were fed experimental diets for 6 weeks. The two control groups received a fiber free diet (FF) or a fiber free diet plus chromium (FF. +. Cr) (2.53 mg Cr/kg diet). The other groups were fed diets containing 5% of cellulose (CEL), 5% of pectin (PEC) or 2.5% of cellulose plus 2.5% of pectin (CEL. +. PEC) with or without chromium. The daily food intake and body weight of the rats were not affected by the experimental diets. Total cholesterol level in plasma was significantly lower (p≤0.05) in the PEC group than the rats fed the FF diet. Feeding of rats with the PEC. +. Cr diet resulted in a significantly higher concentration of plasma HDL cholesterol (p≤0.05) when compared with the CEL. +. Cr group. No statistically significant differences in the concentrations of plasma triglycerides (TG) and non-esterified fatty acids (NEFA) between the groups were observed. Rats fed the CEL. +. Cr diet had a significantly lower content of cholesterol and rats fed the CEL. +. Cr diet lower contents of cholesterol and TG in the liver (p≤0.05) when compared with other groups. The concentration of HbA1c was significantly lower (p≤0.05) in rats fed the CEL and CEL. +. Cr diets than in other groups. A significantly lower concentration of plasma glucose (p≤0.05) was observed in rats receiving the CEL. +. PEC diet in comparison with the FF group. A significant effect of fiber and chromium combination was shown only in the case of triglyceride content in the liver of rats (p≤0.05). In conclusion, our results suggest that a diet containing fiber (PEC) and chromium or their supplements may be beneficial for correcting some disturbances of lipid metabolism, and a diet containing cellulose or its supplements may be used to improve glycemic control. © 2011 Elsevier GmbH.

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