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1

Loss of floristic diversity in the Karkonosze Mts [SW Poland]

100%
Fabiszewski J., Wojtun B.
Fragmenta Floristica et Geobotanica
|
2000
|
tom 45
|
nr 1-2
2

Effects of snowpack and litter decomposition on nitrogen dynamics in soil of the Alpine zone of the Eastern Tibetan Plateau

84%
Hu X., Wu Y., Wang Q., Liu L., Zuo W.-Q., Shi F.-S., Wu N.
Polish Journal of Ecology
|
2013
|
tom 61
|
nr 2
Microbes remain active and play an important role in soil nitrogen (N) cycle during the winter in soil of the alpine zone. A shift from microbial N immobilization process dominant during summer to prevailing microbial mineralization process during the winter is observed. Warmer soil under deep snow cover may increase the microbial activity and rate of organic matter decomposition over the winter. Furthermore, severe shortages of dissolved carbon (C) in the winter may cause microbial mortality and lyses. Thus, C limitation on microbial growth and activity may have an important effect on winter N mineralization and even on soil N pools. However, the combined effects of additional organic C (litter inputs) and snow cover on soil N biogeochemical processes in the Tibetan Plateau remain unclear. In the current study, the in situ effects of snowpack and litter decomposition on N dynamics in the alpine zone of the Eastern Tibetan Plateau were investigated. Intact soil core incubations in three different snow regimes (0, 30 and 100 cm depth snow) in the winter were used to solve the problem by measure concentrations of mineral form of soil N. In addition, the litter bag method was used to analyze the litter decomposition over the winter. Our results indicate that the snow cover reduced the ammonium (NH₄⁺-N) content, accelerate N mineralization in soil, and did not significantly change the dissolvable organic nitrogen (DON) and microbial biomass nitrogen (MBN). Meanwhile, snowpack increased the litter N content and accelerated litter decomposition in late winter. Litter addition reduced the MBN and NH₄⁺ -N contents in soil, but increased the nitrate (NO₃⁻ -N) content and net N mineralization, suggesting that N availability to plants during the spring thaw period may be enhanced.
3

Drained fens: comparison of nitrogen mineralization rate and biotic structures in two periods of secondary succession

84%
Kajak A., Petal J.
Polish Journal of Ecology
|
2001
|
tom 49
|
nr 3
4

Contemporary floristic changes in the Karkonosze Mts

84%
Fabiszewski J., Wojtun B.
Acta Societatis Botanicorum Poloniae
|
2001
|
tom 70
|
nr 3
5

Seasonal changes of soil nitrogen mineralization along restoration gradient of sandy grassland, Northern China

67%
Lv P., Zuo X., Sun S., Zhang J., Zhao S., Hu Y.
Polish Journal of Ecology
|
2020
|
tom 68
|
nr 4
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Soil biological activity as affected by tillage intensity

67%
Gajda A. M., Przewloka B.
International Agrophysics
|
2012
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tom 26
|
nr 1
The effect of tillage intensity on changes of microbiological activity and content of particulate organic matter in soil under winter wheat duirng 3 years was studied. Microbial response related to the tillage-induced changes in soil determined on the content of biomass C and N, the rate of CO2 evolution, B/F ratio, the activity of dehydrogenases, acid and alkaline phosphatases, soil C/N ratio and microbial biomass C/N ratio confirmed the high sensitivity of soil microbial populations to the tillage system applied. After three year studies, the direct sowing system enhanced the increase of labile fraction of organic matter content in soil. There were no significant changes in the labile fraction quantity observed in soil under conventional tillage. Similar response related to the tillage intensity was observed in particulate organic matter quantities expressed as a percentage of total organic matter in soil. A high correlation coefficients calculated between contents of soil microbial biomass C and N, particulate organic matter and potentiallymineralizable N, and the obtained yields of winter wheat grown on experimental fields indicated on a high importance of biological quality of status of soil for agricultural crop production.
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Aktywnosc enzymow bioracych udzial w mineralizacji azotu organicznego w glebie pod roznymi roslinami

51%
Wyczolkowski A. I., Dabek-Szreniawska M., Bieganowski A., Zimon A.
Acta Agrophysica
|
2006
|
tom 07
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nr 4[135]
1035-1041
8

Sezonowe zmiany liczebności bakterii czynnych w procesie mineralizacji związków azotu w wodzie jeziora napowietrzanego

43%
Niewolak S., Potocka E.
Acta Academiae Agriculturae ac Technicae Olstenensis. Protectio Aquarum et Piscatoria
|
1989
|
tom 16
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