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Zawartość i profilowe rozmieszczenie frakcji fosforu w uprawnych i leśnych czarnoziemach z poziomem cambic

100%

Jonczak J., Simansky V., Pollakova N.

Sylwan

2015

tom 159

nr 11

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.

Specjacja fosforu w leśnych glebach glejobielicowych terasy nadzalewowej Słupi

100%

Jonczak J., Sztabkowski K.

Sylwan

2017

tom 161

nr 09

The studies focused on phosphorus speciation in Gleyic Podzols of the supra−flood terrace of the Słupia River, south from Słupsk (N Poland). The content and within profile distribution of phosphorus were considered in the context of parent material origin and the influence of podsolization, high groundwater level, forest vegetation and vicinity of the town. Four soil profiles representing Gleyic Albic Ortsteinic Podzols and Umbric Gleyic Albic Ortsteinic Podzols developed from aeolian sand were described. Samples were taken from distinguished horizons and physical and chemical properties were analyzed using standard procedures. Sequential extraction of phosphorus was performed by the method of Hedley et al. [1982]. The soils were characterized by strong acidic reaction, high abundance of organic matter and low degree of mineral substrates weathering. Profile distribution of free iron oxides was typical for Podzols. The content of total phosphorus in parent materials varied from 142.2 to 365.0 mg/kg, whereas in solum from 103.0 to 1035.6 mg/kg, reaching the highest values in B horizons and the lowest in E horizons. The noted concentration was high as compared to the soils of the same type within the area of Poland. Increased phosphorus concentration can be caused by the influence of high groundwater level and vicinity of the town, as a source of biogenic substances. The predominance of residual fraction in solum evidences young age of the studied soils, which is confirmed also by the results of thermoluminescence dating. Profile distribution patterns of total phosphorus and its fractions reflects the influence of groundwater, vegetation and soil−forming processes in turnover of this element. The results confirm also strong linkage between iron and phosphorus in the soils.

Ograniczanie wyników

2 Sylwan

2 Jonczak J.

1 Pollakova N.

1 Simansky V.

1 Sztabkowski K.

1 2017

1 2015

Wyniki wyszukiwania

Zawartość i profilowe rozmieszczenie frakcji fosforu w uprawnych i leśnych czarnoziemach z poziomem cambic

Specjacja fosforu w leśnych glebach glejobielicowych terasy nadzalewowej Słupi