Heavy metal, macro- and microelement content of grass species and dicotyledons

2005 ◽  
Vol 53 (3) ◽  
pp. 349-352 ◽  
Author(s):  
J. Tasi
Keyword(s):  
Dominant Species ◽  
Poa Pratensis ◽  
Grass Species ◽  
High Dispersion ◽  
Leguminous Plants ◽  
Natural Grasslands ◽  
Grassland Plants ◽  
Dicotyledonous Plants ◽  
Element Contents ◽  
Microelement Content

Data on the composition of fodder from pastures (grass, meadow-hay) can be frequently found in the literature, but data on the element contents of the grass or non-grass species composing natural grasslands are scarce. In order to analyse the element contents of plants, samples were collected over 3 years (1998-2000) from different types of natural grasslands. On non-fertilised grasslands, the dominant species was Festuca pseudovina. The dominant species on fertilised grasslands was Poa pratensis, with Bromus inermis or Elymus repens being dominant at some sites. The results showed that leguminous plants had the highest contents of four of the five macroelements, while the highest level of K was found in dicotyledonous plants. The Na and Ca contents of the plants were higher on non-fertilised grasslands, while the level of all the other macroelements was higher in plants from fertilised grasslands. Since the Se contents showed a high dispersion, only a trend was observed, indicating that the Se content of grass species is not significantly lower than that of other grassland plants. On non-fertilised grasslands, grass species contained the most Cr and Pb, while leguminous plants contained the most Cd. In fodder from fertilised grasslands, the highest quantity of Cd and Cr was found in grass species, and the most lead in non-leguminous dicotyledons.

scholarly journals The challenge of abandonment for the sustainable management of Palaearctic natural and semi-natural grasslands

Hacquetia ◽  
2018 ◽  
Vol 17 (1) ◽  
pp. 5-16 ◽  
Author(s):  
Orsolya Valkó ◽  
Stephen Venn ◽  
Michał Żmihorski ◽  
Idoia Biurrun ◽  
Rocco Labadessa ◽  
...  
Keyword(s):  
Sustainable Management ◽  
Grassland Management ◽  
Grass Species ◽  
Economic Changes ◽  
The Core ◽  
Natural Grasslands ◽  
Biomass Removal ◽  
Management Regimes ◽  
The Impact ◽  
Grassland Biodiversity

Abstract Disturbance by biomass removal is a crucial mechanism maintaining the diversity of Palaearctic grasslands, which are unique biodiversity hotspots. The century-long traditional land use of mowing, grazing and burning, has been fundamentally changed in many parts of the Palaearctic. Due to socio-economic changes, large areas of former pastures and meadows have been abandoned, leading to a succession towards secondary scrublands or forest and the encroachment of competitor grass species, all leading to a decrease in biodiversity. Here we report the causes and consequences of the cessation of traditional grassland management regimes, provide strategies for reducing the impact of abandonment and consider these from the perspective of sustainability. We consider the possibilities for initiating sustainable management regimes in the contemporary socio-economic environment, and discuss the prospects and limitation of alternative management regimes in the conservation of grassland biodiversity. These themes are also the core topics of this Special Feature, edited by the EDGG. We hope that this Special Feature will encourage steps towards more sustainable strategies for the conservation of Palaearctic grasslands and the integration of the sustainability perspective into their conservation.

scholarly journals Syntaxonomical analysis of sandy grassland vegetation dominated by Festuca vaginata and F. pseudovaginata in the Pannonian basin

Hacquetia ◽  
2021 ◽  
Vol 20 (1) ◽  
pp. 217-224
Author(s):  
Károly Penksza ◽  
Péter Csontos ◽  
Gergely Pápay
Keyword(s):  
Species Richness ◽  
Dominant Species ◽  
Cynodon Dactylon ◽  
Pannonian Basin ◽  
Grass Species ◽  
Grassland Vegetation ◽  
Typical Species ◽  
Ephedra Distachya ◽  
Sandy Grassland ◽  
Dominant Grass

Abstract Festucetum vaginatae Rapaics ex Soó 1929 em. Borhidi 1996 is a characteristic association of the calcareous sandy areas of the Pannonian basin; its dominant grass species is Festuca vaginata. Another typical species of these sandy areas is the newly discovered F. pseudovaginata. The question is whether F. pseudovaginata forms an independent coenotaxa? Our study proved that F. vaginata and F. pseudovaginata populations grow separately and compose different associations. Stands dominated by F. pseudovaginata had a higher species richness and harboured twice as many Festuco-Brometea species compared to the Festucetum vaginatae stands. Diagnostic species of the Festucetum pseudovaginatae association are Festuca pseudovaginata, Colchicum arenarium, Ephedra distachya, Koeleria majoriflora, and Astragalus onobrychis. The number of species, the density of the individuals, and the variability and diversity of the vegetation separated it from the Festucetum vaginatae association; thus, it can be considered an independent endemic association. Festucetum pseudovaginatae has its own differentiating and dominant species: Carex stenophylla, Cynodon dactylon, Eryngium campestre, Kochia laniflora.

scholarly journals Additional Host Plants of Four Species of Billbug Found on New Jersey Turfgrasses

1990 ◽  
Vol 115 (4) ◽  
pp. 608-611 ◽  
Author(s):  
Jennifer M. Johnson-Cicalese ◽  
C.R. Funk
Keyword(s):  
New Jersey ◽  
Perennial Ryegrass ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Host Plants ◽  
Cynodon Dactylon ◽  
Poa Pratensis ◽  
Kentucky Bluegrass ◽  
Grass Species ◽  
Red Fescue

Studies were conducted on the host plants of four billbug species (Coleoptera:Curculionidae: Sphenophorus parvulus Gyllenhal, S. venatus Chitt., S. inaequalis Say, and S. minimus Hart) found on New Jersey turfgrasses. A collection of 4803 adults from pure stands of various turfgrasses revealed all four billbugs on Kentucky bluegrass (Poa pratensis L.), tall fescue (Festuca arundinacea Schreb.), and perennial ryegrass (Lolium perenne L.), and S. parvulus, S. venatus, and S. minimus on Chewings fescue (F. rubra L. ssp. commutata Gaud.). Since the presence of larvae, pupae, or teneral adults more accurately indicates the host status of a grass species, immature billbugs were collected from plugs of the various grass species and reared to adults for identification. All four species were reared from immature billbugs found in Kentucky bluegrass turf; immatures of S. venatus, S. inaequalis, and S. minimus were found in tall fescue; S. venatus and S. minimus in perennial ryegrass; and S. inaequalis in strong creeping red fescue (F. rubra L. ssp. rubra). A laboratory experiment was also conducted in which billbug adults were confined in petri dishes with either Kentucky bluegrass, perennial ryegrass, tall fescue, or bermudagrass (Cynodon dactylon Pers.). Only minor differences were found between the four grasses in billbug survival, number of eggs laid, and amount of feeding. In general, bermudagrass was the least favored host and the other grasses were equally adequate hosts. The results of this study indicate a need for updating host-plant lists of these four billbug species.

Echinochloa crus-galli (barnyard grass).

2021 ◽  
Author(s):  
Julissa Rojas-Sandoval ◽  
Pedro Acevedo-Rodríguez
Keyword(s):  
Soil Nitrogen ◽  
Crop Yields ◽  
Grass Species ◽  
Coastal Forests ◽  
Virus Diseases ◽  
Forage Crops ◽  
Barnyard Grass ◽  
Natural Grasslands ◽  
The World ◽  
Environmental Weed

Abstract E. crus-galli is a grass species included in the Global Compendium of Weeds (Randall, 2012) and which is considered one of the world's worst weeds. This species has the capability to reduce crop yields and cause forage crops to fail by removing up to 80% of the available soil nitrogen. E. crus-galli is considered the world's worst weed in rice paddies and has been also listed as a weed in at least other 36 crops throughout tropical and temperate regions of the world (Holm et al., 1991). The high levels of nitrates it accumulates can poison livestock. It also acts as a host for several mosaic virus diseases. E. crus-galli is also considered an environmental weed that has become invasive in natural grasslands, coastal forests and disturbed sites in Asia, Africa, Australia, Europe and America (FAO, 2014; USDA-ARS, 2014).

Productivity of restored grassland-steppe ecosystems

2019 ◽  
Author(s):  
Е. Пещанская ◽  
В. Кожевников
Keyword(s):  
Species Composition ◽  
Rare Species ◽  
Dominant Species ◽  
Civil Engineering ◽  
Botanical Garden ◽  
Grass Species ◽  
Anthropogenic Effect ◽  
Steppe Ecosystems ◽  
Stavropol Region ◽  
The One

Необходимость восстановления луговой степи центрального Ставрополья возникла ещё в середине прошлого столетия. Причиной тому послужило усиление воздействия антропогенных факторов на окружающую среду: распашка целины, промышленное и гражданское строительство, чрезмерный выпас скота, а также воздействие различного вида эрозий. В целях сохранения уникального природного комплекса степей с большим набором ценных и редких видов, а также в качестве опыта по восстановлению кормовых угодий в Ставропольском ботаническом саду в 1963 году были начаты исследования по интродукции дёрна. В период с 1963 по 1984 год на площади около 2 га были воссозданы фрагменты луговой степи. Изучение состояния искусственных ценозов, получение сравнительных данных в отношении видового состава, хозяйственно-ботанических групп, урожайности ценозов важнейшие компоненты исследования. В качестве эталонов обследовались территории естественных целинных степей (эталоны) (г. Бучинка, г. Стрижамент, урочище Новомарьевская поляна) с доминантами, сходными с доминантами изучаемых участков, восстановленных дёрном ( Бучинка , Стрижамент , Новомарьевская поляна ). Количество видов на эталонных участках составляет 6592, на восстановленных участках 83103. Видовой состав максимально представлен разнотравьем: от 44 до 72 видов. Во всех выборках проб преобладают злаки (31,9446,17) и разнотравье (29,4041,64), значительный удельный вес приходится на сухие остатки (старику) 7,6128,64. Масса бобовых колеблется в пределах от 0,85 до 11,01, осок от 0,1 до 13,83. Урожайность травостоя восстановленных ценозов сохраняется высокой 3,243,97 т/га. Показатели урожайности травостоя восстановленных формаций превышают показатели эталонов с разницей от 0,61 до 1,65 т/га. Restoration of grasslands became important in the Central Stavropol region in the middle of the last century. The reason was an increased anthropogenic effect: plowing, industrial and civil engineering, cattle grazing and erosion. Experiments on turf introduction got started at the Stavropol Botanical Garden in 1963 to preserve and restore the unique natural steppe area with a large number of valuable and rare species. Fragments of steppe were grown on 2 ha area from 1963 to 1984. The investigation focused on ecosystem conditions, species composition, botanical groups and yield. Natural steppes performed as controls (Buchinka, Strizhament, Novomaryevskaya Polyana) having similar dominant species as the trial areas. Control areas contained 6592 species, the restored ones 83103. There were 4472 different grass species grown. Proportions of gramineous averaged to 31.9446.17, grass mixtures 29.4041.64, grassland litter 7.6128.64. Contents of legumes varied within 0.8511.01, sedge 0.113.83. Grass productivity of the restored area was high 3.243.97 t ha-1. It exceeded the one of the natural areas by 0.611.65 t ha-1.

scholarly journals Sixty Years After the First Description: Genome Sequence and Biological Characterization of European Wheat Striate Mosaic Virus Infecting Cereal Crops

2020 ◽  
Vol 110 (1) ◽  
pp. 68-79 ◽  
Author(s):  
Merike Sõmera ◽  
Anders Kvarnheden ◽  
Cécile Desbiez ◽  
Dag-Ragnar Blystad ◽  
Pille Sooväli ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
High Throughput Sequencing ◽  
Poa Pratensis ◽  
Plant Viruses ◽  
Phleum Pratense ◽  
Grass Species ◽  
Transmission Factor ◽  
Range Data ◽  
Cereal Species ◽  
Systemic Spread

High-throughput sequencing technologies were used to identify plant viruses in cereal samples surveyed from 2012 to 2017. Fifteen genome sequences of a tenuivirus infecting wheat, oats, and spelt in Estonia, Norway, and Sweden were identified and characterized by their distances to other tenuivirus sequences. Like most tenuiviruses, the genome of this tenuivirus contains four genomic segments. The isolates found from different countries shared at least 92% nucleotide sequence identity at the genome level. The planthopper Javesella pellucida was identified as a vector of the virus. Laboratory transmission tests using this vector indicated that wheat, oats, barley, rye, and triticale, but none of the tested pasture grass species (Alopecurus pratensis, Dactylis glomerata, Festuca rubra, Lolium multiflorum, Phleum pratense, and Poa pratensis), are susceptible. Taking into account the vector and host range data, the tenuivirus we have found most probably represents European wheat striate mosaic virus first identified about 60 years ago. Interestingly, whereas we were not able to infect any of the tested cereal species mechanically, Nicotiana benthamiana was infected via mechanical inoculation in laboratory conditions, displaying symptoms of yellow spots and vein clearing evolving into necrosis, eventually leading to plant death. Surprisingly, one of the virus genome segments (RNA2) encoding both a putative host systemic movement enhancer protein and a putative vector transmission factor was not detected in N. benthamiana after several passages even though systemic infection was observed, raising fundamental questions about the role of this segment in the systemic spread in several hosts.

Wind-mediated seed dispersal of invasive forage grasses from agricultural grasslands in Hokkaido, Japan

2019 ◽  
Vol 12 (02) ◽  
pp. 133-141
Author(s):  
Chika Egawa ◽  
Atsushi Shoji ◽  
Hiroyuki Shibaike
Keyword(s):  
Seed Dispersal ◽  
Poa Pratensis ◽  
Plant Cover ◽  
Kentucky Bluegrass ◽  
Dispersal Distance ◽  
Phleum Pratense ◽  
Grass Species ◽  
Forage Grass ◽  
Forage Grasses ◽  
Number Of Seeds

AbstractAlthough introduced pasture grasses are essential for forage production in current livestock farming, some species cause serious impacts on native biodiversity when naturalized. Information on the seed dispersal of invasive forage grasses from cultivated settings to surrounding environments can inform management efforts to prevent their naturalization. In this case study, we quantified the wind-mediated seed dispersal distance and amount of dispersed seed of invasive forage grasses from agricultural grasslands in Hokkaido, northern Japan. In total, 200 funnel seed traps were installed around three regularly mown grasslands and one unmown grassland where various forage grass species were grown in mixture. Seeds of each species dispersed outside the grasslands were captured from May to October 2017. Based on the trapped distances of seeds, the 99th percentile dispersal distance from the grasslands was estimated for six species, including timothy (Phleum pratense L.), orchardgrass (Dactylis glomerata L.), and Kentucky bluegrass (Poa pratensis L.). For two dominant species, P. pratense and D. glomerata, the numbers of seeds dispersed outside the field under mown and unmown conditions were determined under various plant cover situations. The estimated dispersal distances ranged from 2.3 m (P. pratense) to 31.5 m (P. pratensis), suggesting that areas within approximately 32 m of the grasslands are exposed to the invasion risk of some forage grass species. For both P. pratense and D. glomerata, the number of seeds dispersed outside the unmown grassland exceeded 100 seeds m−2 under high plant cover situations, while the number of seeds dispersed from the mown grasslands at the same plant cover level was less than one-third of that number. The results suggest that local land managers focus their efforts on frequent mowing of grasslands and monitoring of the areas within approximately 32 m of the grasslands to substantially reduce the naturalization of invasive forage grasses.

scholarly journals Securing of an Industrial Soil Using Turfgrass Assisted by Biostimulants and Compost Amendment

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1310 ◽  
Author(s):  
Donato Visconti ◽  
Antonio Giandonato Caporale ◽  
Ludovico Pontoni ◽  
Valeria Ventorino ◽  
Massimo Fagnano ◽  
...  
Keyword(s):  
Festuca Arundinacea ◽  
Poa Pratensis ◽  
Grass Species ◽  
Ammonia Oxidizing Bacteria ◽  
Industrial Sites ◽  
Industrial Soil ◽  
Compost Amendment ◽  
Lower Mobility ◽  
Dactylis Glomerata L ◽  
Very High

This work aimed to study the effects of compost (applied at two rates) and two commercial microbial biostimulants on the mobility and bioavailability of potentially toxic elements (PTEs) in an industrial soil phytostabilized by Dactylis glomerata L. or a mixed stand of grasses (Lolium perenne L., Poa pratensis L. and Festuca arundinacea Shreb.). The soil showed very high pseudototal and bioavailable concentrations of cadmium (Cd) and lead (Pb), due to improper lead-acid batteries storage. Compost amendment in combination with the two biostimulants produced the best outcomes in terms of plant growth and nutrient uptake. The same mix of beneficial microbes improved soil biological fertility enhancing soil nitrogen fixing and ammonia oxidizing bacteria, while reduced the pore water and NH4NO3 extractable concentrations of Cd and at lower extent of Pb in soil. Accordingly, the lower mobility and bioavailability of Cd in soil determined a lower uptake and accumulation of Cd in shoots of different grass species. Our results suggest that a green cap with turfgrass assisted by biostimulants and compost amendment in PTE-contaminated industrial sites could be a reliable and effective practice to protect and restore soil biological fertility and to reduce the risk of PTE dispersion in the surrounding environment.

There Is No Evidence of Geographical Patterning among Invasive Kentucky Bluegrass (Poa pratensis) Populations in the Northern Great Plains

Weed Science ◽  
2016 ◽  
Vol 64 (3) ◽  
pp. 409-420 ◽  
Author(s):  
Lauren A. Dennhardt ◽  
Edward S. DeKeyser ◽  
Sarah A. Tennefos ◽  
Steven E. Travers
Keyword(s):  
Genetic Diversity ◽  
Great Plains ◽  
Propagule Pressure ◽  
Poa Pratensis ◽  
Natural Populations ◽  
Kentucky Bluegrass ◽  
Grass Species ◽  
Northern Great Plains ◽  
Wild Populations ◽  
High Genetic Diversity

The study of colonizing and of dominant grass species is essential for prairie conservation efforts. We sought to answer how naturalized Kentucky bluegrass in the northern Great Plains has become successful in the last 20 yr despite its long history in the northern Great Plains. We tested for evidence of geographical differentiation using flow cytometry and microsatellite markers to ascertain the population genetics of Kentucky bluegrass. Across all tested wild populations, high levels of genetic diversity were detected along with moderate levels of structure. Mantel tests of geographical patterns were not significant. Using clonal assignment, we found two major clones that made up the majority of the tested wild populations. When we compared the wild individuals to pedigree cultivars, we found virtually no genetic overlap across all tests, which did not support our hypothesis of developed cultivars contributing to high genetic diversity in natural populations. Furthermore, DNA content tests indicated a narrow range in ploidy in wild populations compared with lawn cultivars, further supporting a hypothesis of divergence between wild and pedigree cultivars. These results indicate the recent invasion of Kentucky bluegrass in the northern Great Plains is not because of adaptation or propagule pressure, but rather likely an environmental or land use shift.

scholarly journals The resistance of Lolium perenne L. × hybridum, Poa pratensis, Festuca rubra, F. arundinacea, Phleum pratense and Dactylis glomerata to soil pollution by diesel oil and petroleum

2019 ◽  
Vol 65 (No. 6) ◽  
pp. 307-312 ◽  
Author(s):  
Jadwiga Wyszkowska ◽  
Agata Borowik ◽  
Jan Kucharski
Keyword(s):  
Soil Pollution ◽  
Lolium Perenne ◽  
Poa Pratensis ◽  
Dactylis Glomerata ◽  
Diesel Oil ◽  
Phleum Pratense ◽  
Grass Species ◽  
Festuca Rubra ◽  
Lolium Perenne L ◽  
Phleum Pratense L

Resistance of common European grasses to diesel oil and petroleum pollution is not well-known. Therefore, this study aimed at determining the level of resistance of selected grasses to pollution by diesel and petroleum using the pot experiment. The achieved results were compared with those determined for grasses grown on the non-polluted soil. Soil pollution with the tested products was found to significantly decrease the yield of all grasses, with the decrease being lower upon soil pollution with petroleum than with diesel oil. The most resistant to the pollution with diesel oil and petroleum were Phleum pratense L., Lolium perenne L. and Lolium × hybridum Hausskn. The degradation of particular groups of polycyclic aromatic hydrocarbons (PAHs) depended on their chemical properties, on the type of pollutant and grass species. The greatest degradation was determined in the case of BTEX, C<sub>6</sub>–C<sub>12</sub> benzines as well as 2- and 3-ring hydrocarbons, whereas the lowest in the case of 5-and 6-ring hydrocarbons and C<sub>12</sub>–C<sub>25</sub> oils. The most useful species in the remediation of soils polluted with diesel oil and petroleum turned out to be: Lolium perenne L., Lolium × hybridum Hausskn and Phleum pratense L., whereas the least useful appeared to be: Festuca rubra, Dactylis glomerata L. and Poa pratensis L.

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