Wyniki wyszukiwania - AGRO

1

Prace pielegnacyjne na uzytkach zielonych

100%

Pasko T.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

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1994

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nr 05

9

2

Bird communities of a suburb habitat in South African highveld during the wet and dry season

100%

Kopij G.

Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Zootechnika

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2004

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tom 50

3

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Efficiency of utilization of water for evapotranspiration of mountain grasslands

88%

Misztal A., Zarzycki J., Bedla D.

Infrastruktura i Ekologia Terenów Wiejskich

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2015

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nr IV/3

4

Chemical composition of Trifolium repens L. from permanent grasslands in relation to some chemical soil properties

88%

Alberski J., Olszewska M.

Acta Agrophysica

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2015

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tom 22

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nr 4

The objective of this study was to determine the relationship between selected soil properties and the chemical composition of Trifolium repens in swards of permanent grasslands in the Olsztyn Lakeland. The study was carried out in 2005-2008 on permanent grasslands with a high share of legumes in the sward. A total of 26 meadow and pasture sites were investigated where the share of Trifolium repens in the sward ranged from 5% to 25% (2 points on the Braun-Blanquet cover scale). Phytosociological releves were done by the Braun-Blanquet method in selected grasslands in the most representative phytocenoses covering an estimated area of 25 m2. Soil samples were collected at a depth of 5-15 cm for analyses of the physical and chemical properties of soil. Samples of plant material of Trifolium repens were also collected from each treatment for chemical analyses. Analyses of soil composition and nutrient content in plant material were carried out with the standard methods. Bulk density, actual moisture content and water-holding capacity were determined by the oven-drying and gravimetric method, acidity was measured in KCl solution with the concentration of 1 mol dm–3, phosphorus and potassium content were determined by the Egner-Riehm method, magnesium content – by the Schachtschabel method, calcium and sodium content – by the universal method proposed by Nowosielski, and copper, zinc, manganese and iron content – by atomic absorption spectrometry (AAS). Plant material was analysed to determine the content of total nitrogen – by the Kjeldahl method, crude fibre – by the Henneberg- Stohman method, phosphorus – by the vanadium-molybdenum method, potassium, calcium and sodium – by flame photometry, magnesium and micronutrients by AAS. The highest number of communities with Trifolium repens were noted on light and medium textured soils with high and very high content of Mg, moderate abundance of Ca and micronutrients, moderate and low levels of P, low content of K and slightly acidic pH. Dry matter of Trifolium repens was characterised by high total protein content and optimal crude fibre content. A mineral composition analysis revealed optimal levels of phosphorus, magnesium and sodium, excessive content of potassium, calcium and manganese, and deficiency of copper, zinc and iron. A significant relationship between the chemical properties of soil and the content of total protein, crude fibre and mineral components in white clover dry matter was confirmed.

5

Species diversity in grassland communities under different habitat conditions

88%

Jastrzebska M., Szarejko T., Holdynski C., Jastrzebski W. P.

Polish Journal of Natural Sciences

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2009

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tom 24

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nr 1

43-59

Two hundred species of vascular plants were identified in grasslands on the Popielno Peninsula, in the part used for agricultural purposes. Species diversity in plant communities, measured by the Shannon-Wiener index, was found to depend on soil type, land use type and phytosociological affiliation. Greater species diversity was observed in communities that developed on mineral soils, are used as pastures, and belong to the class Molinio-Arrhenetheretea. The biodiversity of grassland communities on the Popielno Peninsula is affected by habitat conditions. The relationship between vegetation biodiversity and habitat quality is difficult to grasp due to its multidimensional character. The methods of multivariate statistics may prove useful in this respect.

6

Spatial variability of soil moisture in grassland

88%

Janik G.

International Agrophysics

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2005

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tom 19

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nr 1

7

Responses of soil beta-glucosidase activities to simulated increased precipitation in a semi-arid temperate grasslands

75%

Rui X., Liang D.

Polish Journal of Ecology

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2013

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tom 61

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nr 2

In concurrent with global warming, precipitation regimes are predicted to change as well around the world. In this study, two experimental sites were selected with different nutrient availability along a slope to study the effects of simulated increased precipitation on soil β-glucosidase activities in an Inner Mongolian grassland. Soil samples were adjusted to 55% of water holding capacity and incubated at 22°C in the dark for 32 days. Soil β-glucosidase activities were measured prior to and after the incubation. Results showed that soil β-glucosidase activities had differential responses to increased precipitation with a significant increase in the downslope site, but not in the upslope site. Correlation analysis showed that the initial soil β-glucosidase activities exerted a significantly negative relationship with soluble organic nitrogen (N). Our results indicated that both water availability and soil soluble N availability played important roles in regulating β-glucosidase activities in this semiarid region.

8

Niedobory wodne użytków zielonych w różnych rejonach północnej Polski

75%

Labedzki L.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1990

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tom 387

В статье проводится оценка дефицитов воды для трехкосных лугов в некоторых районах северной части Польши. Оценка основывается на декадных водных балансах почвы. Дефициты воды исчисляли после исчерпания легко доступной растениям воды. В северо-западной части Польши луга на почвах с хорошим влагозадержанием должны орошаться с июля по сентябрь, а на почвах со слабым влагозадержанием - уже с мая. В северо-восточной части страны луга на почвах с значительной влагоемкостью не нуждаются в орошении, а на почвах с небольшой влагоемкостью должны орошаться с июля.

9

Invasive plant species - threat to grasslands in river valleys

75%

Szymura M., Dradrach A., Wolski K., Swierszcz S.

Steciana

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2014

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tom 18

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nr 2

River valleys are areas of transition between aquatic and terrestrial communities, with complex biological structure. As ecotones they have high biodiversity as a result of the occurrence of species with different requirements according to soil moisture. They create ecological corridors, allowing migration of the organisms in human disturbed landscape. With these migration routes, species of foreign origin which spread to a new area also benefit. Numerous alien species are considered as invasive, and described as a threat to biodiversity due to strong competitive abilities. To describe the relationships between a number of invasive species, biodiversity and size of a river, the vegetation of 750 m fragments of the Odra and Dobra river valleys on the area of the Wrocław city were analysed. The comparison of plant communities in the valley of a large, managed river (Odra) and its small tributary (Dobra) was carried out. The plant assemblages, occurring in study areas, determined the habitat conditions on the basis of Ellenberg’s indicator values (EIV’s), as well as Shannon-Wiener biodiversity index was defined. The designed sites differed according to Shannon-Wiener biodiversity index, as well as soil properties: moisture, reaction, and fertility. In the study side of the Odra river ruderal and scrub species were dominated, whereas in case of study site of the Dobra river – meadows and ruderal species. The invasive plant species occurring in the Odra valley are: Symphoricarpos albus, Solidago gigantea, S. canadensis, Robinia pseudoacacia, Clematis vitalba, Quercus rubra, Reynoutria japonica, Parthenocissus inserta and Echinocystis lobata, and in the Dobra valley: Solidago gigantea, S. canadensis. The analysis of correlation between Shannon-Wiener biodiversity index and share of invasive species revealed statistically significant influence of occurrence of invasive species on biodiversity of plant communities in case of the Odra river.

10

Habitat preferences of plant communities: New approach based on the GGE biplot analysis

75%

Sienkiewicz-Paderewska D., Paderewski J.

Polish Journal of Ecology

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2015

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tom 63

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nr 3

In this paper we introduce a new way of analysing habitat preferences of plant communities using the genotype and genotype-by-environment interaction effects (GGE) biplot method. We took into consideration real data on six plant associations belonging to the Molinio-Arrhenatheretea class. A total of 241 phytosociological relevès collected with the Braun-Blanquet method were described by the Ellenberg indicators. The two-way classification relevès-by-indicators was analysed with GGE. As a result it is proposed the modified biplot that contains ellipses for making the plot clearer. Next, we present the equations that described both axes and allow adding into the biplot any other relevès or a mean of set of relevès. Based on the generated biplot it is possible to present an ecological characteristics of any type of plant community including its acceptable and typical habitat requirements. The ellipse ranges provide important information about the homogeneity and ecological spectrum of the analysed syntaxon. The constructed equations allow comparing new data with data analysed previously. Summing up, the GGE biplot method is useful for analysing and graphically presenting ecological preferences of plant communities in a simple and comprehensive way.

11

Jesien na uzytkach zielonych

75%

Pasko T.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

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1995

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nr 10

7

12

Hygroscopic moisture content of podzolic soil with biochar

75%

Cybulak M., Sokolowska Z., Boguta P.

Acta Agrophysica

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2016

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tom 23

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nr 4

The main goal of this study was to investigate the effect of biochar on hygroscopic water content (maximum hygroscopicity) of grey-brown podzolic soil (Haplic Luvisol). The biochar was applied to the soil of sub-plots under fallow and grassland in the amount of 0 (control), 10, 20 and 30 Mg·haˉ¹. Soil samples were taken three times per year during the period of 2013-2015. Sorption isotherms of water vapour were determined for all studied samples and the maximum hygroscopicity (MH) was calculated from the relative water vapour pressure at p·p0ˉ¹ = 0.965. Value of the MH varied from 1.5 to 3%. The effect of biochar addition to soil on hygroscopic water content was ambiguous. Addition of biochar caused a slight decrease in MH value in the case of the grassland. For the fallow, a positive effect of biochar addition was observed.

13

Fluctuations of depth of land drainage in Uhnin grassland in years 2011–2012

75%

Grzywna A.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2013

|

tom 10

14

Ecological and economic effects of fertilizers on grassland in lysimetric tests

75%

Pawlat H.

Annals of Warsaw Agricultural University. Land Reclamation

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1987

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tom 23

15

Podsiewy uzytkow zielonych

75%

Pasko T.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

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2004

|

nr 02

17

16

Quantification and comparison of ecosystem services of grasslands versus another fodder crop (maize) based on mineral nitrogen content in the 60-90 cm soil layer

75%

Lipinska H., Wozniak-Kostecka I., Kocira A., Lipinski W., Franczak S., Bochniak A.

Agronomy Science

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2021

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tom 76

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nr 4

17

Additives applied in grass silage production as depending on cultivation intensity of grassland

75%

Opitz von Boberfeld W.

Animal Science Papers and Reports. Supplement

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2002

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tom 20

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nr 1

18

The effect of different grassland management regimes on herbage production

75%

Dularova A., Mrkvicka J.

Acta Agraria et Silvestria. Series Agraria

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2003

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tom 40

|

nr Sek.roln.

The effect of modified pratotechnology on herbage production of meadow sward was observed since 2001. Treatments were: mown once (1C) and twice a year with biomass removal — fertilized (2C + N) and unfertilized (2C), mulched twice (2M) and once a year (1M) and non- used plots (0). The yields of aboveground phytomass in 2001 and 2002 were highest on fertilized twice mown treatment {8.7 and 10.4 t DM/ha resp.), on unfertilized twice mown treatment (7.7 and 8.8 t DM/ha resp,). With lower management intensity herbage yield decreased, except in the non-use treatment (6.2 t DM/ha in 2002). The enhancement of yield from nitrogen released from mulch was not found. Vertical stratification of green mass is affected by botanical composition and different treatments.

19

Soil nematode response to root production in grassland on fen peat soils

75%

Wasilewska L.

Polish Journal of Ecology

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1999

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tom 47

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nr 3

20

Regeneration of Nardus stricta subalpine grasslands in the Giant Mountains [Krkonose]

75%

Hejcman M., Nezerkova P., Pavlu V., Gaisler J., Lokvenc T., Pavlu L.

Acta Societatis Botanicorum Poloniae

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2005

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tom 74

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nr 3

The origin of Nardus stricta dominated subalpine grassland (Nardo-Caricion rigidae alliance) is a frequently discussed topic in the Giant Mountains (Karkonosze in the Czech Republic). Many researchers considered them, as secondary stands arisen after Pinus mugo removal and by consequent oligotrophization of original plant communities, caused by long-term rough grazing and hay making activities without manuring. On the contrary, they are recognized as natural due to inability of generative reproduction of N. stricta and the very slow vegetative spread there. The aim of this study was to find proofs for generative reproduction of mat grass in subalpine conditions of the Giant Mountains. We identified a Pinus mugo nursery with arable land abandoned in 1956 and compared its vegetation with that of the surrounding area. Dense and homogenous sward dominated by N. stricta developed during the succession on the old arable land for 48 years, and it is an indisputable proof of generative reproduction of N. stricta there. Synthesizing historical facts on human activities in the past and the results of our contemporary vegetation analysis, we conclude that the Nardo-Caricion rigidae grassland was capable to spread relatively quickly, when agricultural activities above the upper timber line were introduced.

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