Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Content of Assimilation Dyes and Water Balance in Common Dandelion Found Nearly Chemical Works “Police”

100%

Malinowska K. , Marska B. , Stepaniuk S.

Ecological Chemistry and Engineering. A

2011

tom Vol. 18, nr 8

1093-1100

The aim of the present studies was to assess air pollution around Chemical Works “Police” by means of selected physiological parameters (chlorophyll a, b, carotenoids and water balance) of common dandelion. Accumulation of sulfur in leaves of common dandelion was clearly larger at the distance of up to 0.7 km from the emitter than its content in control plants. On the basis of the coefficient of correlation, it was observed that the amount of sulfur in leaves had a significant effect on the content of assimilation dyes in common dandelion. Concentration of chlorophyll a+b and carotenoids in the assimilation apparatus and the value of the relative water content index of the plants gathered in the area of the Chemical Works “Police” was respectively lower by 31 %, 23 % and 14 % in comparison with these parameters in control leaves.

Celem badań była ocena zanieczyszczenia powietrza wokół Zakładów Chemicznych "Police" za pomocą wybranych parametrów fizjologicznych (chlorofilu a, b, całkowitego, karotenoidów, bilansu wodnego) mniszka pospolitego. Przeprowadzone badania wykazały, że akumulacja siarki w liściach badanego gatunku była wyraźnie większa w odległości do 0,7 km od emitora od jej zawartości w roślinach kontrolnych. Na podstawie współczynnika korelacji stwierdzono, że ilość siarki w liściach miała istotny wpływ na zawartość barwników asymilacyjnych u mniszka pospolitego. Koncentracja chlorofilu a+b i karotenoidów w aparacie asymilacyjnym oraz wartość wskaźnika względnej zawartości wody rośliny zebranej w obrębie ZCh "Police" była odpowiednio niższa o 31 %, 23 % i 14 % w porównaniu do tych parametrów w liściach kontrolnych.

The effect of soil tillage and nitrogen fertilization on microbiological parameters of soil on which spring triticale is grown

63%

Klikocka H. , Narolski B. , Klikocka O. , Glowacka A. , Juszczak D. , Onuch J. , Gaj R. , Michalkiewicz G. , Cybulska M. , Stepaniuk S.

Polish Journal of Environmental Studies

2012

tom 21

nr 6

In a field experiment conducted on leached brown soil in Malice, near Zamość (southeastern Poland) in 2007-08, the effect of soil tillage and nitrogen fertilization on microbiological parameters of the soil under spring Triticale cultivation was investigated. Soil tillage – conventional and simplified with double or single cultivation – was combined with different variants of nitrogen fertilization – 60, 90, and 120 kg N·ha⁻¹. The soil was sampled three times – I - end of tillering stage (BBCH 29), II - end of heading stage (BBCH 59) and III – late milk stage (BBCH 77) – and its microbiological properties were determined. Generally, the simplified soil tillage and nitrogen fertilization up to 90 kg N·ha⁻¹ favors bacteria, Actinomycetes, and fungi content, as well as dehydrogenase activity. The conventional soil tillage and nitrogen fertilization at a level of 120 kg·ha⁻¹ reduced the number of microflora. The highest numbers of micro-organisms in the soil were noted at the stage (BBCH 59) of the spring Triticale, but dehydrogenase activity was highest at that stage (BBCH 29). In formulating the biological index of soil fertility (BISF), the biological activity of the soil (M), organic carbon content (H) and soil absorbing capacity (T) were taken into account. Biological activity of the soil (M) was expressed as numbers of micro-organisms, or as dehydrogenase activity. The BISF, calculated based on dehydrogenase activity, is significantly dependent on the all factors investigated. However, BISF calculated as the sum of the numbers of bacteria and Actinomycetes in relation to fungi (B+A/F) was positively correlated with grain yield. Grain yield was highest following conventional soil tillage and nitrogen fertilization at a level of 60 kg N·ha⁻¹.