Wyniki wyszukiwania - Biblioteka Nauki

1

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.

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2017

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tom 65

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nr 3

EN

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.

2

The effect of plant age and crown size of asparagus on fern growth in terms of carbohydrate balance

84%

Krzesinski W. , Gasecka M. , Stachowiak J. , Zurawicz A. , Knaflewski M. , Golinski P.

Acta Scientiarum Polonorum. Hortorum Cultus

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2008

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tom 07

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nr 3

EN

Asparagus plants cv. “Epos” were planted in the aeroponic system with recirculation in two cycles. The effect of asparagus plant age and crown size on fern growth were studied. The results show that the age of asparagus plants affected the number of ferns – the number of assimilation shoots increased with age – while the weight of asparagus crowns had an effect on the number and total weight of shoots. An increase in crown weight by about 1000 g caused an increase in the number of shoots by about 6, while the weight of one shoot increased by approx. 144 g. The age of aasparagus plants was also a significant factor for dry weight, % Brix and total carbohydrate contents in roots before the assimilation season as well as glucose, fructose, sucrose, GFS and total carbohydrate contents in roots after the assimilation season.

PL

Rośliny szparaga odmiany „Epos” uprawiane były w systemie aeroponicznym z recyrkulacją w dwóch cyklach. Przedmiotem badań był wpływ wieku roślin szparaga i wielkości karpy na wzrost pędów asymilacyjnych. Badania wykazały, że wiek roślin wpływał na ilość pędów asymilacyjnych – ilość pędów wzrastała wraz z wiekiem – natomiast masa karpy wpływała na ilość oraz masę wszystkich pędów ogółem. Wzrost masy karpy o 1000 g powodował wzrost liczby pędów asymilacyjnych o 6 sztuk i wzrost masy pojedynczego pędu o 144 g. Wiek roślin szparaga był istotnym czynnikiem wpływającym na suchą masę, % Brix i ogólna zawartość cukrów w korzeniach przed okresem asymilacji, jak również na zawartość glukozy, fruktozy, sacharozy, GFS i cukrów ogółem w korzeniach spichrzowych po okresie asymilacji.

3

The effect of some factors on the red heart formation in beech trees

84%

Racko V. , Cunderlik I.

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tom 79

4

Ground-Active Arthropod Recovery in Response to Size of Shrub Plantations in a Desertified Grassland Ecosystem

84%

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

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tom Vol. 65, nr 3

410--422

EN

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.

5

The effect of temperature and crown size on asparagus yielding

84%

Gasecka M. , Krzesinski W. , Stachowiak J. , Knaflewski M.

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tom 21

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nr 1

49-59

6

Vegetative and reproductive parameters of introduced plum cultivars

84%

Vitanova I. , Dimkova S. , Ivanova D.

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2004

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tom 12

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nr Spec.ed.2