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Wyszukujesz frazę "permanent grassland" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Zinc levels in permanent dry meadow in differential irrigation and fertilization
Gospodarka cynkiem na łące trwałej grądowej nawadnianej oraz bez nawodnień w warunkach zróżnicowanego nawożenia
Autorzy:
Ducka, M.
Barszczewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/336801.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
permanent grassland
zinc
soil
sward
trwałe użytki zielone
cynk
gleba
ruń łąkowa
Opis:
The study took place between years 2009-2011 in Falenty, Mazovian Voivodeship, as a part of a long-term scientific experiment, began in 1987, using the randomised block method. All blocks were irrigated until 2008. In 2009 each block was divided into two areas: irrigated and non-irrigated. The study involved four levels of inorganic nitrogen fertiliser and two levels of mixed organic and inorganic fertiliser in the form of fermented cattle urine. Inadequate levels of zinc were observed in the sward from the majority of plots, totalling less than 30 mg Zn∙kg-1. This figure continued to decline in subsequent years, which could be correlated to a decline in soil pH, which contributed to the increased filtration of this element into the soil profile, since increased acidity led not only to the greater absorption of zinc by plants but also an increased propensity for leaching. The zinc content of sward differed across consecutive harvests, but no clear tendencies were observed. A significantly lower quantity of the element was observed in sward from the first harvest in all plots only in the first year of the experiment. A tendency was observed for the quantity of the zinc content of sward to decline as the level of fertilisation increased, which may have been caused by the greater crops obtained through the use of greater quantities of inorganic fertiliser and the effect of dilution.
Badania prowadzono w latach 2009-2011 w Falentach, na wieloletnim doświadczeniu ścisłym, założonym w 1997 r., metodą losowanych bloków. Do 2008 r. wszystkie obiekty były nawadniane, a od 2009 r. każdy obiekt został podzielone na dwie części - nawadnianą i bez nawodnień. Na obiektach stosowano zróżnicowane nawożenie mineralne oraz organiczno-mineralne w formie gnojówki bydlęcej. Na większości obiektów odnotowano niedoborową zawartość cynku w runi łąkowej, wynoszącą poniżej 30 mg Zn∙kg-1. W kolejnych latach notowano spadek zawartości cynku w runi, co mogło wiązać się ze spadkiem pH gleby, co mogło przyczynić się do większego przemieszczania się tego składnika w głąb profilu glebowego i w efekcie do jego wymywania. Istotnie mniejszą zawartość tego składnika notowano w runi z pierwszego pokosu na wszystkich obiektach jedynie w pierwszym roku badań. Zawartość cynku w runi łąkowej różnicowała się w kolejnych pokosach w poszczególnych latach, jednak bez wyraźnych tendencji. Na większości obiektów nawadnianych odnotowano większą zawartość cynku w runi, niż na obiektach bez nawodnień. Tendencja zmniejszania się zawartości cynku w runi wraz ze wzrastającym poziomem nawożenia mogła być spowodowana wysokimi plonami uzyskanymi pod wpływem większych dawek nawozów mineralnych i w wyniku rozcieńczenia.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2014, 59, 3; 31-34
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of Lumbricidae Extracting with an Environmentally Friendly Method
Autorzy:
Mazur-Pączka, Anna
Pączka, Grzegorz
Kostecka, Joanna
Podolak, Agnieszka
Garczyńska, Mariola
Powiązania:
https://bibliotekanauki.pl/articles/125097.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
earthworms sampling
non-destructive extraction method
electroshocking
mixed method
permanent grassland
arable land
Opis:
Lumbricidae, as representatives of edaphone, are used in ecological research. Over the years, various attempts to improve the ways of earthworm extraction have been made. One of the pro-environmental methods for extracting these animals from the soil is the method involving the application of electric current (octet). The aim of the study was to compare the efficiency of the earthworm extraction using the mixed method (manual segregation along with the use of 0.5% formalin solution) with the method applying the electroshocking. The species composition of earthworms extracted using both methods was the same (seven species of earthworms belonging to three ecomorphological groups were found). A lower number and biomass of earthworms were found in the permanent grassland and arable land with the help of octet than using the mixed method. Further research is needed to improve the existing methods for Lumbricidae extraction and to implement new ones that would be safe for the edaphon representatives.
Źródło:
Journal of Ecological Engineering; 2020, 21, 5; 114-119
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical assessment of certain properties of soil under permanent grasslands
Autorzy:
Wylupek, T.
Gawryluk, A.
Powiązania:
https://bibliotekanauki.pl/articles/961385.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
statistical assessment
certain property
soil
permanent grassland
grassland
meadow soil
plant community
organic matter
pH
macroelement
Opis:
Geobotanical studies comprised soil and permanent grasslands in the valley of the Por River. The paper describes an assessment of the content of organic matter, reaction (pH) and availability of P, K and Mg in meadow soils overgrown with plant communities classified within the following syntaxonomic units: associations Phragmition and Magnocaricion, orders Molinietalia and Arrhenatheretalia, classes Scheuchzerio-Caricetea nigrae and the order Trifolio fragiferae-Agrostietalia stoloniferae. The results of chemical analyses were confronted with the limit ordinals after IUNG in Puławy (1990) and submitted to statistical analysis using the system of SAS 9.2 from Enterprise Guide 4.2. The analyzed habitats of permanent grasslands had neutral reaction and were dominated by organic soils. Mineral soils occurred in a small area. Generally, a very high or high availability of assimilable P, a low or very low availability of K and a differentiated content of Mg were found in organic soils. In mineral soils, on the other hand, a very high content of P and Mg and a very low content of K were observed. Comparative analyses of selected properties of the habitats showed very significant diversity. Variability coefficients were generally characterized by high values, which points to considerable differentiation of the analyzed properties of the soils within the distinguished syntaxonomic units. Based on our analysis of the Pearson’s correlation coefficients, a number of relations, both positive and negative ones, can be noticed between the properties studied.
Źródło:
Journal of Elementology; 2016, 21, 2
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of weather on dynamics of plant functional groups in an abandoned limestone grassland
Autorzy:
Dzwonko, Z.
Loster, S.
Powiązania:
https://bibliotekanauki.pl/articles/58030.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
weather impact
climate condition
plant-weather relation
dynamics
plant functional group
abandoned grassland
limestone grassland
permanent plot
secondary succession
Polska
Opis:
We examined to what extend the rate and direction of changes in unmanaged grassland depend on fluctuations in climatic conditions. Vegetation data from permanent plots in a semi-natural grassland in southern Poland collected over 12 years were used. Relations between weather variables, time, and the cover of 41 more frequent species and 14 plant functional groups were analysed. The greatest effect on the dynamics of species and functional groups had precipitation in spring and/or early summer, particularly in the current year. The majority of plant groups were significantly affected also by the temperature in spring and early summer in one of the three previous years. During 12 years, the cover of annuals and biennials, short plants, and plants with small leaves decreased, while the cover of taller plants, plants with larger leaves, and with vegetative spread increased. The analyses suggest that these successional changes were not directly associated with climatic conditions but were affected by them indirectly through interspecific competition. The fluctuations in climatic conditions, chiefly precipitation, had a significant effect on both the composition and the rate of changes in abandoned grassland. The increase in the cover of tall perennial species with broad leaves hindered succession towards woodland despite of the presence of woods in the closed vicinity. It can be expected that during drier periods colonisation of grassland by later successional species could be easier.
Źródło:
Acta Societatis Botanicorum Poloniae; 2011, 80, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in plant species composition in abandoned and restored limestone grasslands - the effects of tree and shrub cutting
Autorzy:
Dzwonko, Z
Loster, S.
Powiązania:
https://bibliotekanauki.pl/articles/57086.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
cutting
Polska
grassland
secondary succession
restoration
species diversity
species composition
tree
composition change
plant species
shrub
time series
botany
permanent plot
Opis:
Abandoned semi-natural limestone grasslands are often overgrown by shrubs and trees. Little is know if and to what extant xerothermic limestone grasslands can be restored by tree cutting. This was tested in a 12-year experiment after the clearing of a 35-year-old secondary pine wood developed on unmanaged grassland in the close proximity of not overgrown old grassland. After 12 years, there were no significant differences in the number of field layer species on the plots in the old and restored grasslands. But over this period the number of meadow species increased in all sites, while the number of xerothermic calcareous species increased significantly only in the old grassland plots. The developing shrub layer negatively influenced the number of nitrophilous and ruderal species in grasslands restored in the former close and open woods, and the number of all species, including the number of non-tufted perennials and perennials with vegetative spread, in the former open wood. The number of meadow species increased in years with higher precipitation in late spring and early summer. The obtained results suggest that in overgrowing grasslands shrubs and trees should be cut every few years, before their covers increase to about 30%. However, this treatment alone will not stop the changes to communities with dominance of tall and vegetatively spreading grasses and forbs. Cutting trees and shrubs in sites where most grassland species have already vanished, without additional managements supporting their dispersal, seedling recruitment and development, is not sufficient to restore limestone grasslands rich in xerothermic species.
Źródło:
Acta Societatis Botanicorum Poloniae; 2008, 77, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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