Wyniki wyszukiwania - AGRO

1

Evaluation of calcium and magnesium content in medicinal plants and teas

100%

Szentmihalyi K., Then M., Jasztrab S., Lado K., Fodor J., Szoke E.

Journal of Elementology

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2005

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tom 10

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nr 4 Suppl.1

104

2

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The role of storage reservoirs in reducing calcium migration from agricultural catchments

75%

Koc J., Duda M.

Journal of Elementology

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2009

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tom 14

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nr 3

467-476

This study was conducted on a storage reservoir situated in a valley, in the lower course of the Sząbruk stream in north-eastern Poland, the Olsztyn Lakeland mesoregion. The catchment area of the Sząbruk stream consists of an agricultural and an afforested part. A storage reservoir is found in the lower part of the Sząbruk stream valley. The reservoir was built 25 years ago. It is enclosed by a dike and equipped with an outlet box. Outflows from the reservoir pass through the terminal segment of the Sząbruk stream to Lake Wulpińskie. The results of the experiment indicate that the calcium content of water evacuated from the catchment was determined by the type and intensity of catchment use, ranging from 22.3 mg Ca⋅dm-3 to 178 mg Ca⋅dm-3. The highest calcium concentrations, 113 mg Ca⋅dm-3 on average, were noted in the agricultural catchment connected to a drainage network; lower levels, 78.7 mg Ca⋅dm-3, were found in farming areas drained via ditches, while the lowest Ca content in water, 38.7 mg Ca⋅dm-3 on average, was determined in outflows from afforested catchments. Calcium concentrations were lower during the growing season in all studied catchment types. The calcium load discharged from the catchment dependnded on the catchment management. The highest calcium loss per area unit was observed in the drained agricultural catchment (76.6 kg Ca⋅ha-1⋅year-1), followed by the catchment drained via ditches (56.3 Ca⋅ha-1⋅year-1) and the afforested catchment (31.8 Ca⋅ha-1⋅year-1). Despite the inflow of calcium-rich drainage water, calcium concentrations decreased by 11%, from 56.8 mg Ca⋅dm-3 to 50.3 mg Ca⋅dm-3, after the stream’s waters passed through the storage reservoir. An increase in Ca levels was noted in the girdling ditch. The flow of water through the ditch minimizes sedimentation, and higher quantities of Ca were supplied with drainage water. The reservoir accumulated 242.4 kg Ca per ha in the course of one year, mostly in the growing season (83%). The above indicates high involvement of biological processes. The reservoir fulfilled the role of a barrier inhibiting calcium loss from the catchment.

3

Effect of rootstock on Ca concentration in different parts of apples

75%

Ben J. M., Koszorz M.

Acta Scientiarum Polonorum. Hortorum Cultus

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2005

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tom 04

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nr 1

In the years 1998–2000 an investigation was carried out on ‘Jonagold’ apples harvested from 6-year old trees grafted on M.9, M.26, P 2, P 22 and P 60. In 1998 and 1999 the average calcium content in fruit was significantly higher than in 2000. The highest calcium was observed in the peel of apples, in each of the year. The effect of the rootstock on the level of calcium in the calyx, core and pedicle part of apples changed, depending on the vegetation season. In each year of the experiment the strongly dwarfing rootstock P 22 had the smallest share in the accumulation of calcium in the different parts of apples.

4

Changes of free calcium content as plant response to nickel pollution under different iron content in the substrate

75%

Matraszek R., Szymanska M.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

5

Content and uptake of phosphorus and calcium with the yield of potato tubers depending on cultivation operations

63%

Zarzecka K., Gugala M.

Journal of Elementology

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2010

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tom 15

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nr 2

385-392

In 2002-2004, a study was carried out, based on a field experiment set up on soil of very good rye complex. The experiment was designed as randomized sub-blocks with three replications. Two methods of soil tillage, conventional and simplified tillage, and seven weeding methods such as application of the following herbicides 1) control object – without herbicides, 2) Plateen 41,5 WG , 3) Plateen 41,5 WG + Fusilade Forte 150 EC, 4) Plateen 41,5 WG + Fusilade Forte 150 EC + adjuvant Atpolan 80 EC, 5) Barox 460 SL, 6) Barox 460 SL + Fusilade Forte 150 EC, 7) Barox 460 SL + Fusilade Forte 150 EC + adjuvant Atpolan 80 EC), constituted experimental factors. Phosphorus content in the tubers of cultivar Wiking potato was determined by colorimetry and calcium was tested by the atomic absorption spectrophotometry method (AAS). Phosphorus and calcium content and their uptake with tubers yield significantly depended on the tillage methods and weed control methods as well as weather conditions in the study years. Potato tubers from the simplified tillage cultivation had more phosphorus than tubers whose cultivation was based on the conventional tillage, in contrast to calcium, which was more abundant in tubers from the conventional method. The herbicides significantly reduced the phosphorus content and increased the calcium content compared with the control object. Phosphorus and calcium uptake by potato was significantly higher in the conventionally tilled treatments compared with the simplified method, and in the herbicide-treated plots compared with the mechanically cultivated control treatment.

6

Content of some macroelements in blood serum and haematological parameters in goats of different age

63%

Brzezinska M., Orowicz W., Pieczynska M.

Journal of Elementology

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2005

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tom 10

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nr 4 Suppl.1

22-23

7

Content of calcium, magnesium, and phosphates in antlers and cranial bones of the European red deer [Cervus elaphus] depending on age and industrial pollution of the environment

63%

Nowicka W., Machoy Z., Gutowska I., Nocen I., Piotrowska S., Chlubek D.

Journal of Elementology

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2005

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tom 10

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nr 4 Suppl.1

77-78

8

Impact of insecticides on magnesium and calcium contents in potato tubers

63%

Zarzecka K., Gugala M., Zadrozniak B.

Journal of Elementology

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2009

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tom 14

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nr 1

189-195

A study has been carried out on the basis of a field experiment set up on soil of very good rye complex. The experiment was designed as randomized sub-blocks with three replications. Experimental factors included three cultivars of edible potato – Wiking, Mors, and Żagiel, and six Colorado potato beetle control methods using the following insecticides: Actara 25 WG at the rate of 80 g ha-1, Regent 200 SC at the rate of 0.1 dm3 ha-1, Calypso 480 SC at three rates: 0.05; 0.075 and 0.1 dm3 ha-1, and a control treatment without chemical protection. Magnesium and calcium contents in potato tubers were determined by the ASA method. The content of the elements depended on the cultivars, Colorado potato beetle control methods and weather conditions throughout the growing season. The insecticides applied significantly increased magnesium and calcium contents compared with the tubers harvested from the control treatment where no chemical protection was applied. Tubers of Żagiel and Wiking cultivars had the highest magnesium content and calcium content, respectively.

9

Macroelement content in potato tubers as affected by manuring with undersown catch crop, and production system

63%

Plaza A., Makarewicz A., Gasiorowska B., Cybulska A., Gorski R., Rzazewska E.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2017

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tom 20

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nr 4

10

Ionic balance in some phases of winter barley seed growth under different fertilization rates

63%

Barczak B., Nowak K., Kozera W., Majcherczak E.

Journal of Elementology

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2005

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tom 10

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nr 4 Suppl.1

15

11

The effect of weed control methods on magnesium and calcium content in edible pea seeds [Pisum sativum L.]

63%

Gugala M., Zarzecka K.

Journal of Elementology

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2010

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tom 15

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nr 2

269-280

A field experiment was carried out in 2006-2008 at the Experimental Farm in Zawady, owned by the University of Podlasie. The experimental design was a split-plot arrangement of treatments with three replicates. The factors examined included: factor I – three sowing densities (75, 100 and 125 plants per 1 m2), and factor II – five weed control methods (control – mechanical weed control and four herbicidebased treatments). The objective of the study was to determine the effect of weed control methods as well as sowing density on magnesium and calcium content in the seeds of edible pea (Pisum sativum L.) of Merlin cultivar. The highest seed yield was obtained in the plots where weeds were chemically controlled (Afalon Dyspersyjny 450 SC was sprayed just after sowing and followed by an application of a mixture of Basagran 600 SL + Fusilade Forte 150 EC when plants were 5 cm high). The yield from this treatment was 4.84 t ha–1, on average. The lowest yield was harvested in the plots where weeds were mechanically controlled (the control) – on average 2.92 t ha–1. Variance analysis showed significant influence of weed control methods and weather conditions on magnesium and calcium contents in pea seeds. The herbicides applied in the experiment increased concentrations of the above elements compared with the control. The highest magnesium content (1.389 g kg–1) in pea seeds was found in the plots where Afalon Dyspersyjny 450 SC was applied just after sowing at a dose of 1.5 dm3 ha–1 and followed by a mixture of Basagran 600 SL at a dose of 2.0 dm3 ha–1 + Fusilade Forte at a dose of 1.5 dm3 ha–1 applied post-emergence. The highest calcium content was recorded for treatment 2, consisting of an application of Afalon Dyspersyjny 450 SC at a dose of 1.5 dm3 ha–1 just after sowing and followed by post-emergence spraying with Basagran 600 SL at a dose of 2.0 dm3 ha–1 – on average 0.989 g kg–1. In turn, sowing density had no influence on the discussed characteristics although a tendency was observed towards increasing magnesium and calcium content in edible pea seeds.

12

Land snails as indicators of soil humidity in Danubian woodland [SW Slovakia]

63%

Cejka T., Hamerlik L.

Polish Journal of Ecology

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2009

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tom 57

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nr 4

741-747

Moisture along with available calcium content are the major environmental factors controlling species richness and composition of the terrestrial molluscan fauna. In the present study, we focused on snails in a floodplain forest and their response on humidity. We described the model of response and calculate the humidity optima of particular species if possible. Generalised linear model (GLM) combined with Poisson distribution was used to ch aracterise the change of species abundance along a humidity gradient. From 31 species tested, 21 have shown significant response to humidity. The majority of specie s tested had unimodal response, four species showed monotonic regression type. Based on their humidity optima, species distributed along a moisture gradient belonged to three main ecological groups: (i) mesohygrophilous woodland species living mostly in non-inundated areas with humidity optima below 4, (ii) hygrophilous, forest hygrophilous and euryhygric species with optima between 4 and 6 and (iii) strongly hygrophilous (polyhygrophilous) species with mois ture optima above 6. Estimated moisture preferences for Danubian floodplain woodland land snail fauna would be a useful tool in a longterm biological monitoring of changing moisture regime.

13

Magnesium, calcium, potassium and sodium content in groundwater and surface water in arable lands in the commune [gmina] of Katy Wroclawskie

63%

Orzepkowski W., Pulikowski K.

Journal of Elementology

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2008

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tom 13

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nr 4

605-614

This paper discusses some aspects of the research conducted in the hydrological years 2000/2001-2002/2003 on arable areas around several small water bodies located on the outskirts of villages in the commune of Kąty Wrocławskie. The aim of the paper was to assess the content of selected chemical elements in the groundwater and small water bodies. The water bodies included in the research appeared a few decades ago as a result of human activity; in Zybiszów and Bliż they are small post-mine water bodies, whereas in Smolec and Rybnica they are ponds filling former clay excavation sites. Their surface ranges widely between 0.05 and 2.2 ha, while the average depth reaches 1.2 to 3.5 m. Since no flows come to these water bodies, they are fed only by ground and rain water. In the research period the water level of the bodies fluctuated between 3 and 40 cm, while the maximum changes in the groundwater level were above 1 m. The examined waters contained elevated levels of elements, the fact which is directly related to the kind of soils in the region. Another factor affecting the content of elements is whether or not soils are used agriculturally. It has been observed that arable areas are distinguished by positive correlation of magnesium, potassium and sodium concentrations in ground and surface waters. Increased content of these elements in Rybnica suggests that the waters receive pollutants from nearby houses. In the groundwater examined the ratio of calcium and magnesium concentrations ranged from 2.7 to 6.9, whereas in the surface water it varied from 1.2 to 5.1. Values below 3 were obtained for both types of water only in Rybnica, which proves the influx of sewage from households.

14

Determination of calcium responsiveness towards exogenous application in two genotypes of Eleusine coracana L. differing in their grain calcium content

63%

Singh U. M., Pandey D., Kumar A.

Acta Physiologiae Plantarum

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2014

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tom 36

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nr 09

In order to investigate the influence of exogenous application of calcium (Ca) on its accumulation in finger millet, two genotypes (GPHCPB-1 and GPHCPB-45), which posses low and high grain Ca contents, respectively, were subjected to regular fertigation of varying levels of Ca in Hoagland’s nutrient medium. The responsiveness of both the genotypes towards increasing exogenous application of Ca (0.1, 5.0, 10 and 20) was determined in terms of changes in tissue Ca levels, agromorpho-physio-biochemical parameters. Sharp increase of Ca content in root, stem and spike was observed up to excess level of Ca (10 mM) in GPHCPB-1 while in case of GPHCPB-45 an increase in Ca content was observed only up to sufficient level of Ca (5 mM) and above that its accumulation remained constant or declined in both the genotypes. In case of leaf the level of Ca increased linearly at all concentrations of supplied Ca in both the genotypes. Both the genotypes behave differentially as GPHCPB-45 genotype accumulated more Ca and was also superior in root length, root dry matter accumulation, plant height and relative water content at Ca deficient condition (0.1 mM) as compared to GPHCPB-1 genotype. The continuous rise in stem diameter, biomass, seed yield, chlorophyll content, SPAD value, seed oxalic acid and phytic acid content were recorded in both the genotypes up to excess or toxic levels of supplied Ca. On the basis of present study it was concluded that Ca accumulation in plant is determined by both genetic (genotype dependent) as well as environmental factors (availability of Ca in rhizosphere).

15

Effect of different dwarfing methods on calcium content in different apple tree organs

63%

Gastol M., Poniedzialek W.

Acta Scientiarum Polonorum. Hortorum Cultus

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2005

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tom 04

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nr 1

The paper presents the results of chemical analyses of different organs of ‘Jonica’ apple trees. The trees were dwarfed with: rootstocks (M.9 and P60), and additionally, with bark grafting (in normal and inverted position), microinterstocks (M.9, P22, M.27) and retardant (Paclobutrazol). Microinterstock is an additional way of dwarfing, where a ring of bark taken from dwarfing rootstock is grafted on the tree’s trunk. In the years 1996–1999 fruit, leaf, wood, bark and root samples of each treatment were collected. After washing, samples were dried, grounded and subjected to mineralization and analised for calcium by atomic absorption spectrophotometry. The highest concentration of Ca was noted in the bark of investigated trees (1.53% d.w.). Relatively high concentration of Ca was noted in leaves and roots (0.98% d.w. and 0.48% d.w. respectively). The lowest content was noted in wood and friuts (0.09% d.w. and 0.02% d.w.). Analised rootstocks did not affect significantly the leaves calcium content. On the contrary rootstocks influenced fruit Ca ammounts; the lower Ca content was noted in fruits from trees grafted on P60 rootstock. Bark graftage or microinterstocks did not influenced or lowered Ca fruit content. The only exception was microinterstock P22 which significantly increased fruit Ca ammounts. No correlation between leaf and fruit Ca content was found. Bark grafting and microinterstocks decreased root Ca content. This effect was especially evident in the first year after grafting.

16

Content of calcium, phosphorus, sodium and potassium in the grain of barley, triticale and rye and in the seeds of yellow and blue lupine

51%

Lubowicki R., Kotlarz A., Jaskowska I.

Polish Journal of Natural Sciences. Supplement

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2006

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tom 03

123-128

17

W sprawie przechodzenia wapnia z tygli porcelanowych

51%

Karkocha I., Chojnicka B., Hiszpanska C.

Roczniki Państwowego Zakładu Higieny

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1956

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tom 07

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nr 6

18

Variability in the concentrations of Ca, Mg, Sr, Na, and K in the opercula of perch (Perca fluviatilis L.) in relation to the salinity of waters of the Oder Estuary (Poland)

51%

Torz A., Nedzarek A.

Oceanological and Hydrobiological Studies

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2013

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tom 42

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nr 1

19

Comparison of calcium, magnesium, potassium and sodium contents in Ginkgo biloba L. leaves from Hungary

51%

Stefanovits-Banyai E., Bertenyi-Divinyi Z., Kiss A. S., Blazovics A., Koczka N.

Journal of Elementology

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2002

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tom 07

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nr 1

49-56

20

Impact of season and sex on calcium and phosphorus content in the meat of roach (Rutilus rutilus L.) from the Brda River (Poland, Bydgoszcz)

51%

Stanek M., Janicki B.

Folia Biologica

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2011

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tom 59

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nr 3-4

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