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Wyszukujesz frazę "chernozems" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Magnetic susceptibility of chernozems
Autorzy:
Hasso-Agopsowicz, Agata
Jeleńska, Maria
Wicik, Bogumił
Powiązania:
https://bibliotekanauki.pl/articles/2028862.pdf
Data publikacji:
2004-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
soil magnetism
chernozems
Opis:
Among other forms, iron contained in soil is a component of magnetic minerals, both primary and secondary ones, produced by various soil forming processes. The composition of the soil magnetic fraction, characterised by a magnetic susceptibility, is the consequence of its origin. The character of susceptibility changes along the analysed chernozems' profiles indicates a similarity of the parent rock, as well as the pedogenic processes forming the chernozems from the territories of Poland and the Ukraine. The influence of anthropogenic factors could be seen in the increased susceptibility within the humus horizon of the degraded chernozem.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2004, 11; 57-61
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of soil aggregate in loamy soils of Slovakia
Autorzy:
Šimanský, V.
Kravka, M.
Jonczak, J.
Powiązania:
https://bibliotekanauki.pl/articles/1190164.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
soil organic matter
water-stable aggregates
threshold limit
Chernozems
Fluvisols
Opis:
Stability of soil aggregates is affected by dozens different factors and their individual effects are hardly discernable. For this reason, we investigated the structure of the top layer (to a depth 0.2 m) of loamy soils (Haplic Fluvisol, Mollic Fluvisol and Calcaric Chernozem), at three sites (Šulekovo, Trakovice and Bučany) in the north-western part of the Danube Lowlands (Slovakia) in order to: (1) evaluate the differences in soil organic matter (SOM), texture, water-stable aggregates (WSA) and content of SOM in WSA; (2) determine the relationships between SOM, texture and WSA; and (3) identify the threshold limits for soil organic carbon (SOC) and the particle-size distributions for stabilization of water-stable macro-aggregates (WSAma). We found significant effects of a soil type on both SOM and WSA as well as on the content of SOM in WSA. When all loamy soils were assessed together, positive significant correlations were observed between size fractions of WSAma >2 mm and the content of SOC and hot-water soluble carbon (CHWD). The content of WSAma 1-0.25 mm and water-stable micro-aggregates (WSAmi) correlated negatively with SOC and CHWD. The quality of SOM was more important than its quantity for the stabilization of WSAma at size fractions 1-0.25 mm and WSAmi. The content of clay improved the aggregation in size fractions of WSAma >2 mm in the investigated top layer of loamy soils. The maximum WSAma content occurred where the ratio of organic carbon content in WSAma to that in soil was ~1.0. The threshold limits for clay and silt content for the formation of WSAma were ~20% and equal to 43%, respectively.
Źródło:
Journal of Elementology; 2017, 22, 2; 581-592
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zawartość i profilowe rozmieszczenie frakcji fosforu w uprawnych i leśnych czarnoziemach z poziomem cambic
Content and profile distribution of phosphorus fractions in arable and forest Cambic Chernozems
Autorzy:
Jonczak, J.
Simansky, V.
Pollakova, N.
Powiązania:
https://bibliotekanauki.pl/articles/989926.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
gleboznawstwo
gleby uprawne
gleby lesne
czarnoziemy
fosfor
zawartosc fosforu
frakcje fosforu
specjacja chemiczna
rozmieszczenie profilowe
chernozems
arable soils
forest soils
phosphorus speciation
Opis:
Comparative studies on the content and profile distribution patterns of phosphorus fractions in arable and forest Cambic Chernozems were conducted near the village Báb (western Slovakia). Soil samples were collected from every 10 cm and analyzed using standard procedures in soil science. Long term differences in the type of the studied soils usage were reflected in their physical and chemical properties (bulk density, porosity, acidity, the total content of organic carbon and nitrogen), as well as in the content and profile distribution patterns of phosphorus fractions. Total phosphorus content ranged from 498.8 to 754.7 mg/kg in arable soil and from 480.4 to 835.9 mg/kg in forest soil. Residual fraction, which constituted 54.9−77.8% of total phosphorus in arable soil and 57.3−79.2% in forest soil, was a predominant fraction. Such large contribution of this fraction is typical for young soils, with weakly weathered mineral substrates. Exchangeable phosphorus in arable soil constituted 0.6−6.1%, while 0.5−3.0% in forest soil, showing decreasing trends with depth in both soils. Free iron oxides and carbonates were important factors influencing profile distribution of phosphorus in the investigated soils. Iron oxides bound the element mainly in acidified horizons, whereas carbonates in alakaline (Bw and C) horizons. Organic fraction significantly differed in the investigated soils. A much larger content and contribution of this fraction in total phosphorus was noticed in forest soil. The content of organic phosphorus was positively related to the content of organic carbon. Stable fraction of organic phosphorus predominated over labile one in both soils.
Źródło:
Sylwan; 2015, 159, 11; 931-939
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of runoff of suspended solids on quality of surface water: Case study of the Szreniawa River
Wpływ zawiesiny glebowej wymywanej ze zlewni Szreniawy na jakość wód powierzchniowych
Autorzy:
Kowalczyk, Agnieszka
Smoroń, Sylwester
Kopacz, Marek
Powiązania:
https://bibliotekanauki.pl/articles/293336.pdf
Data publikacji:
2019
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
cambisols
chernozems
concentration of NO3-N
NH4-N
PO4-P
dusty soils
loess
suspended solids
czarnoziemy
gleby brunatne
gleby pyłowe
lessy
stężenie N-NO3
N-NH4
P-PO4
zawiesina glebowa
Opis:
Research was conducted in selected points of the Szreniawa River basin (area 712 km2) located in the Miechowska Upland and the Proszowice Plateau. In the years 2016–2017 water samples from the Szreniawa River were taken monthly and the concentration of suspended solids was determined by filtration. The concentration of biogenic components NO3-N, NH4-N and PO4-P was determined by a colorimetric method, using an automatic flow analyser. The average concentration of suspended solids ranged from 192 to 390 mg∙dm–3 (with minimum values of 5–20 mg∙dm–3 and maximum 837–3937 mg∙dm–3) at individual points. There was an upward trend between the content of suspended solids and the concentration of biogenic components. An extremely high concentration of suspended solids happened during storm-like precipitation at the end of June 2017 and amounted to 3937.2 mg∙dm–3. The concentration of biogenic components was also highest in this period and amounted to 2.50 mg∙dm–3 of NO3-N, 0.49 mg∙dm–3 of NH4-N and 1.18 mg∙dm–3 of PO4-P. At low precipitation the concentration of suspended solids was also low (5.0 mg∙dm–3). A similar pattern was observed for the concentration of biogenic components which was 0.39 mg∙dm–3 of NO3-N, 0.17 mg∙dm–3 of PO4-P and 0.08 mg∙dm-3 of NH4-N.
Badania prowadzono w wybranych punktach na terenie zlewni Szreniawy (o powierzchni 712 km2), położonej na wyżynie Miechowskiej i Płaskowyżu Proszowickim. W latach 2016–2017 pobierano w cyklu miesięcznym próbki wody z rzeki Szreniawy i oznaczano w nich ilości zawiesiny glebowej (metodą filtracji) oraz stężenie N-NO3, N-NH4 i P-PO4 – metodą kolorymetryczną, za pomocą automatycznego analizatora przepływowego. Średnia zawartość zawiesiny glebowej wynosiła od 192 do 390 mg∙dm–3 (min. 5–20, max 837–3937). Stwierdzono rosnący trend zależności między zawartością zawiesiny glebowej a stężeniem składników biogennych. Przykładem ekstremalnie dużej zawartości zawiesiny glebowej był koniec czerwca 2017 r., gdy po opadach o charakterze nawałnicowym wynosiła ona aż 3937,2 mg∙dm–3. Wtedy też stężenie składników biogennych było największe i kształtowało się na poziomie 12,50 mg∙dm–3 N-NO3, 0,49 mg∙dm–3 N-NH4 oraz 1,18 mg∙dm–3 P-PO4. W przypadku niewielkich opadów zawartość zawiesiny glebowej była mała i wynosiła 5,0 mg∙dm–3, a stężenie N-NO3 wynosiło 0,39 mg∙dm–3, P-PO4 – 0,17 mg∙dm–3 i N-NH4 – 0,08 mg∙dm–3.
Źródło:
Journal of Water and Land Development; 2019, 41; 83-90
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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