Wyniki wyszukiwania - AGRO

1

Delay in the flow of plant debris on floodplains overgrown with shrub vegetation

100%

Hammerling M., Walczak N., Zawadzki P., Kaluza T.

Acta Scientiarum Polonorum. Formatio Circumiectus

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2014

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tom 13

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nr 4

The study aims to analyze the statistical probability of the slowing down of the plant debris flow through an area rich in shrub vegetation during floods. The shrub density has a direct influence on water velocity. The study was conducted in a 2-meter section of an artificial hydraulic flume. 15 tests were made for each of the different-shaped elements. The artificial elements used were either rectangular or elliptical in shape. Tests were conducted for three different spacings of cylindrical elements imitating the shrub vegetation and for three different depths of the hydraulic flume. Analysis of the test results leads to the conclusion that an increase in the density of cylindrical elements does not always cause an increase in the flow time of plant debris. The study also shows that an increase in the water depth causes an increase in the flow time of elements imitating the thick debris, which is due to a decrease in the water flow velocity. The study also presents an analysis of the probability of plant debris being detained by the cylindrical elements imitating the shrubs. This probability was observed to be higher for rectangular than elliptical elements. It was also observed to be inversely proportional to the water depth. The obtained results indicate that the subject matter of the current study is very interesting and complex and merits further investigation.

2

Selected medicinal trees and shrubs in the collection of Dendrological Garden in Glinna near Szczecin [northwest Poland]

100%

Kubus M.

Herba Polonica

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2009

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tom 55

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nr 3

304-310

The small dendrological garden in Glinna (about 5.5 ha) near Szczecin (northwest Poland) is well known for growing a lot of unique trees. The local mild microclimate in combination with the Atlantic climate of West Pomerania produce favorable conditions for growing many varieties of trees and shrubs which go freeze in the central and eastern Poland. The garden’s collection amounts to 750 taxons of trees and shrubs, representing 220 species. What is valuable in the collection of the arboretum is that the cultural varieties of the plants make only 14%. The special collection of the Garden are species of Chinese origin (200 taxons) and maples (65 taxons). Basing on the data from the literature, over 147 taxons used in conventional and unconventional medicine as well as in country medicine were distinguished, among which plants of Asian origin (mainly from China) predominate. This work presents the characteristics and the crop obtained from trees and shrubs rarely grown in Poland that possess medicinal properties, among others: Cunninghamia lanceolata, Torreya sp., Acer davidii subsp. grosseri, Asimina triloba, Broussonetia papyrifera, Clerodendrum trichotomum, Chaenomeles cathayensis var. wilsonii, Diospyros kaki, Eleutherococcus sp., Eucommia ulmoides, Lindera benzoin, Magnolia officinalis var. biloba, Phellodendron sachalinense, Poncirus trifoliata, Sassafras albidum, Symplocos paniculata, Zanthoxylum piperitum, Zanthoxylum simulans.

3

Recovery of trees and shrubs in manor park in Droblin, Lesna Podlaska commune

100%

Durlak W., Dudkiewicz M.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2013

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tom 10

4

Changes in soil organic carbon and its density fractions after shrub-planting for desertification control

100%

Liu J.-B., Zhang Y.-Q., Wu B., Qin S.-G., Lai Z.-R.

Polish Journal of Ecology

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2014

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tom 62

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nr 2

Planting shrubs on sand land and degraded pasture are two main measures for desertification control particularly in northwest China. However, their effects on soil organic carbon (SOC) and its fractions remain uncertain. We assessed the changes in stocks of SOC, light fraction of SOC (LF–SOC) and heavy fraction of SOC (HF–SOC) after planting Artemisia ordosica (AO, 17 years), Astragalus mongolicum (AM, 5 years) and Salix psammophila (SP, 16 years) in sand land and planting Caragana microphylla (CM, 24 years) on degraded pasture. Results show that: 1) after planting AO, AM and SP on sand land, SOC stocks increased by 162.5%, 45.2% and 70.8%, respectively, and LF–SOC accounted for a large proportion in the increased SOC. Dry weights of LF–SOC, rather than carbon concentrations, were higher in shrublands than that in sand land; 2) after planting CM on degraded pasture, SOC stock decreased by 9.3% and all the loss was HF–SOC in 60–100 cm soil layer where both herbaceous fine root biomass (HFRB) and soil water content (SWC) also decreased. The results indicate that planting shrubs can result in an increase of SOC in sand land, whereas that can lead to a decrease of SOC in degraded pasture. The increase of SOC in sand land mainly bases on the accumulation of dry weight of LF–SOC. The loss of SOC in degraded pasture is caused by the decrease of carbon concentrations of HF–SOC, which can be related to the reduction of HFRB and SWC in deep soil layer. Therefore, shrub-planting for desertification control not always improve the quantity and stability of SOC in northwest China.

5

Jesien to najlepszy okres sadzenia drzew i krzewow

100%

Rydzik A.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

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1994

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nr 11

2

6

Ground-active arthropod recovery in response to size of shrub plantations in a desertified grassland ecosystem

100%

Liu R., Liu J., Zhao J., Xi W., Yang Z.

Polish Journal of Ecology

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2017

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tom 65

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nr 3

The ground-active arthropod diversity response to size of shrub plantations in desertified grassland ecosystems is largely unknown. In the study ground-active arthropods were collected by pitfall trapping beneath shrub canopy of very low, low, medium and high size, with adjacent mobile sandy land as a control. It was found that arthropod dominant taxa from mobile sandy land were significantly distinctive from those from plantations of different shrub size. A considerably lower Sørensen index (i.e., 0.25–0.48) was found between the arthropod communities from mobile sandy land and the canopy of either shrub size, than between those under low and medium/high shrub size (i.e., 0.62 to 0.69). The arthropod total abundance was significantly greater under the shrub canopy of very low size in comparison to that of low and medium shrub size and mobile sandy land, with the intermediate values under shrub canopy of high shrub size. Taxon richness and diversity of arthropod communities were distinctly lower under the shrub canopy of low size in comparison to very low, medium and high shrub size. The shrub size was found to have different effects on the density and richness distribution of arthropod trophic groups (i.e., predators, phytophagous, saprophagous, and omnivorous). It was concluded that shrub plantations could facilitate ground-active arthropod diversity recovery when they were afforested in mobile sandy land. There was a contrasting effect of shrub size on ground-active arthropod diversity recovery versus arthropod abundance when grazing was excluded.

7

Krzewy lecznicze Polski

100%

Bacler B.

Prace Ogrodu Botanicznego Uniwersytetu Wrocławskiego

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1999

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tom 05

349-352

8

Constitutive and induced chemical defenses against insect grazing on leaves of forest understory shrubs

100%

Zmuda M., Karolewski P., Giertych M. J., Oleksyn J.

Acta Physiologiae Plantarum

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2007

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tom 29

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nr 1 Suppl.

9

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Woody flora of Hydra (Argosaronic Islands, Greece)

100%

Browicz K.

Dendrobiology

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2001

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tom 46

From 5 to 27 May, floristic dendrological field studies were conducted on Hydra. the wild flora of trees and shrubs comprises 37 species belonging to 34 genera and to 21 families. An alphabetical list of cultivated woody species is added, including fruit trees.

10

The origin of dendroflora species in selected parks of Warsaw

100%

Wysocki C., Nosal S.

Annals of Warsaw Agricultural University. Horticulture

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2001

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tom 22

11

Dendroflora of the town of Jarocin

100%

Klimko M., Kaczmarek G.

Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana

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2006

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tom 10

12

Lipophilic constituents of the twigs of Staphylea holocarpa Hemsl.

100%

Masterova I., Woldemichael G. M., Toth J., Ubik K.

Herba Polonica

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2002

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tom 48

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nr 2

Badania lipofilnych składników występujących w gałązkach Staphylea holocarpa Hemsl. wykazały obecność: n-nonakozanu, β-sitosterolu i dwóch triterpenów - kwasu betulinowego i kwasu β-ursolowego.

13

Alien tree and shrub species in Poland regenerating by self-sowing

100%

Danielewicz W., Malinski T.

Rocznik Dendrologiczny

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2003

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tom 51

14

First report of tomato black ring virus [TBRV] in the natural infection of Sambucus nigra in Poland

100%

Pospieszny H., Borodynko N., Jonczyk M.

Journal of Plant Protection Research

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2004

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tom 44

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nr 4

15

The population dynamics of aphids Cinara juniperi De Geer on the shrubs of Juniperus communis L. in urban conditions of Lublin

100%

Jaskiewicz B., Kot I.

Acta Scientiarum Polonorum. Hortorum Cultus

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2007

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tom 06

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nr 4

Studies on the population dynamics of aphids Cinara juniperi De Geer on the shrubs of Juniperus communis L. in the urban conditions of Lublin were conducted in the years 2002–2004 in two types of sites: a street one and a park one. The first individuals of this species were most frequently observed at the turn of April and May, while the maximum population was found in the first half of May. The course of the weather conditions affected the population dynamics of aphids. Those insects were observed in much bigger numbers on the shrubs growing in the street site. The preying of C. juniperi caused browning and drying out of the needles and inhibition of the stem growth, which had an influence on lower decorative character of the examined plants.

16

Spider mites [Tetranychidae] recorded on ornamental trees and shrubs in nurseries

100%

Soika G., Labanowski G.

Journal of Plant Protection Research

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2003

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tom 43

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nr 2

17

Rare species of trees and shrubs of tree nursery in Danowo near Goleniow

100%

Kubus M.

Rocznik Dendrologiczny

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2003

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tom 51

18

Occurence of aphids on Cornus alba L.

100%

Jaskiewicz B.

Acta Scientiarum Polonorum. Hortorum Cultus

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2003

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tom 02

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nr 1

The studies were conducted on Cornus alba L. in the years 1999–2001 in the green areas on two sites: with heavy traffic (site A) and no traffic (site B). C. alba was the host plant for two species of aphids: Anoecia corni (F.) and Aphis salicariae Koch. A. corni was dominating in the years of observations and it was most numerous in 2000, while A. salicariae in 1999. The weather had a significant effect on the aphid population. After a mild winter and warm spring aphids were more numerous. High temperatures (over 30°) and stormy rainfalls as well as autumn ground frosts limited their population. On the other hand, aphidophagous species did not limit the population of aphids in any considerable manner. A. corni lowered the ornamental values of C. alba shrubs, especially in autumn.

19

Shrub effects on herbaceous vegetation vary with growth stages and herb relative location

84%

He Y., Liu X., Xie Z.

Polish Journal of Ecology

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2014

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tom 62

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nr 3

In arid and semi-arid ecosystems, shrubs have an important effect on neighboring plants. However, little is known about the interaction of herb growth stages and shrub location on herb performance. We selected Reaumuria soongorica, (Pall.) Maxim a shrub dominant in the semiarid region of northwest China, to determine whether (1) shrubs facilitate or have negative effects on neighbouring herbaceous vegetation, and (2) such effects vary with herb growth stage and with shrub orientation relative to herbs. The presence of herbaceous plant species, plant density, plant height, and percent cover were determined along 2 m long transects spreading in four directions from the base of shrub – east (transect E), west (transect W), south (transect S), and north (transect N); this was repeated for three growth stages (in May, June and July). Results indicated that the effects of R. soongorica on neighboring herbs in different growth stages were similar. Species number of herb-layer plants tended to increase from beneath the canopy to the opening, but plant density, cover and plant height decreased with distance away from shrub base. The presence of R. soongorica had positive effects on density, cover, and plant height, and negative on the number of herbaceous species during the entire growing season. Herbaceous plants growing on transect N under the shrub canopy had significantly higher density and percent cover than those growing in other directions. Biomass of herbs on transect N grown under the shrub canopy was higher than that of herbs on other transects. We concluded that shrub effects on neighbouring herbaceous vegetation were closely related to the shrub orientation relative to the herbs. Therefore, using shrubs as nurse plants for grass-growing must consider the relative placement of shrubs.

20

Does habitat of Atriplex halimus L. affect plant strategy for osmotic adjustment?

84%

Hassine A. B., Bouzid S., Lutts S.

Acta Physiologiae Plantarum

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2010

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tom 32

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nr 2

The impact of water stress was analysed in the xero-halophyte Mediterranean shrub Atriplex halimus using two Tunisian populations originating from a subhumid coastal site (Monastir) or from a semi-arid area (Kairouan). Seedlings were exposed for 10 days to nutrient solution containing either 0 or 15% polyethylene glycol. Water potential (Ψw), osmotic potential (Ψs), osmotic potential at full turgor [Ψs(100)], relative water content (RWC), shoot dry weight (DW) and changes in solute concentrations were quantified every 2 days throughout the stress period and inorganic solutes contents were determined at the end of the treatment. The water deficit induced a decrease in Ψw, Ψs and RWC in both populations, recorded changes being higher in plants of Monastir than those of Kairouan while the shoot dry weight was reduced in a similar extent in stressed plants from both populations. Water deficit induced an increase in proline, glycinebetaine and sugar concentrations. Proline accumulated as early as after the 24-h stress treatment while, glycinebetaine required more than 6 days of stress to accumulate. At the end of the stress period, the plants of Kairouan population accumulated higher amounts of proline than those of Monastir, while an opposite trend was reported for glycinebetaine. Both populations specifically accumulated Na⁺ in response to drought stress, suggesting that this element could play a physiological role in the stress response of this xero-halophyte species. Presented results suggest that the non-recyclable osmotic solute glycinebetaine does not necessarily preferentially accumulates in population facing permanent water stress and that other strategy than osmotic adjustment might be involved in drought tolerance of A. halimus.

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