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Zawartosc azotu azotanowego w gleboko odwodnionych glebach torfowo-murszowych

100%

Turbiak J., Miatkowski Z.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2006

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tom 513

507-516

W pracy określono wpływ trwałego, głębokiego odwodnienia terenu w rejonie oddziaływania leja depresji KWB „Bełchatów” na chwilową zawartość N-NO₃ w glebach torfowo-murszowych oraz określono straty tego związku w wyniku wymywania w okresie pozawegetacyjnym. W siedlisku zasilanym wodą gruntową średnia zawartość N-NO₃ w glebie torfowo-murszowej wynosiła od 5,3 mg·dm⁻³ w warstwie powierzchniowej do 0,7 mg·dm⁻³ w warstwie spągowej, co było równoważne 20 kg N-NO₃·ha⁻¹. W glebach torfowo-murszowych trwale, głęboko odwodnionych średnia zawartość N-NO₃ w poszczególnych warstwach wynosiła od 20,2 do 66,1 mg·dm⁻³. Średnia zawartość N-NO₃ w tych profilach była od 13 do 17 razy większa niż w profilu o niezmienionych warunkach wodnych i wynosiła od 257 do 346 kg·ha⁻¹. Straty N-NO₃ z głęboko odwodnionych gleb torfowo-murszowych w wyniku wymywania w okresie pozawegetacyjnym wynosiły od 86 do 162 kg·ha⁻¹

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Effects of vegetation cover and slope length on nitrogen and phosphorus loss from a sloping land under simulated rainfall

100%

Qian J., Zhang L.-P., Wang W.-Y., Liu Q.

Polish Journal of Environmental Studies

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2014

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tom 23

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nr 3

In order to evaluate the effects of different slope lengths (1, 2, 3, 4, and 5 m) and different vegetation coverage ratios (20%, 45%, 60%, and 90%) on the mechanisms of nutrient loss and runoff producing processes, we have conducted 14 simulated rainfall experiments. The results show that N and P loss are decided by the concentration and the runoff volume, but when the amounts of N and P in topsoil are small, their loss content mostly depends on runoff volume. Dissolved nitrogen is the main form in the nitrogen loss, while nitrate nitrogen is the main component in dissolved nitrogen, but the proportion in the total nitrogen gradually decreases with slope length increasing or with the increase of vegetation cover; the main form of phosphorus losses is particulate phosphorus, and the excessive sediment-bound nutrient loss released into water might cause secondary pollution of an aquatic environment.

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Quantification and comparison of ecosystem services of grasslands versus another fodder crop (maize) based on mineral nitrogen content in the 60-90 cm soil layer

100%

Lipinska H., Wozniak-Kostecka I., Kocira A., Lipinski W., Franczak S., Bochniak A.

Agronomy Science

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2021

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tom 76

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nr 4

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The impact of nitrogen cycle in agriculture on the environmental quality

84%

Sapek B., Sapek A.

Ochrona Środowiska i Zasobów Naturalnych

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1999

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tom 18

5

Influence of some soil chemical and physical properties on the ammonium nitrogen leaching and ammonia volatilization in the laboratory experiment

84%

Spychaj-Fabisiak E., Murawska B.

Zeszyty Naukowe. Akademia Techniczno-Rolnicza w Bydgoszczy. Rolnictwo

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1999

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tom 44

6

Mineral nitrogen content in the 60-90 cm layer of grassland soils relative to other fodder crops, way of managing agricultural lands and farming intensity

67%

Watros A., Lipinska H., Lipinski W., Tkaczyk P., Krzyszczak J., Baranowski P.

Acta Agrophysica

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2018

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tom 25

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nr 3

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Nitrous oxide emission from grassland in different management conditions [fertilization regimes]

67%

Burczyk P., Oenema O., Kuikmann P., Velthof G.

Journal of Water and Land Development

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2001

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nr 05

The application of large amounts of organic or mineral nitrogen (N) fertilizers to soil may cause high risk of nitrogen (N) losses to air and groundwater. A field experiment on regularly cut (5-6 times per year) grassland located on sandy soil was established to evaluate the effect of different fertilization regimes (control without fertilizer, calcium ammonium nitrate (CAN 100), CAN 50/50 in a split dose, ammonium sulphate (SACAM), cattle slurry in 3 doses (SLUR 20/20/20) of 20 tons of cattle slurry in 2 doses (SLUR 30/30) of 30 tons of manure with additional CAN to equal amounts of N added with mineral fertilizer only) on nitrogen losses via N20 production and emission and N03- leaching to deeper soil layers. For better evaluation of used practices (various N fertilization regimes) nitrogen balances for fields have been estimated. Highest fluxes of N20 were found on fields where slurry was applied. Application of slurry in three doses instead of two decreased emissions. Peak fluxes were found two weeks after application (145 μg m-2 h -1 N), and remained so for at least one month. A second fertilization caused another higher peak on the same fields (205 μg-m2-h-1 N). Mineral fertilization caused lower N20 emissions than slurry: Calcium ammonium nitrate used in one dose caused highest fluxes for mineral fertilizers with a peak also two weeks after application (70 μg m-2 h-1 N). On plots where CAN was divided into two rates, fluxes were lower and similar to plots where ammonium sulphate was applied. Generally, fluxes observed in this experiment were low. This could be attributed to a relatively low mineral N content in soil at the beginning of the growth period. Accumulated losses of N20 during the vegetation period until the first cut were highest for the SLUR 30/30 treatment (slurry 30 m3 at the first and 30 m3 at the third cut) and lowest for the CONTROL treatment.

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Evaluation of soil losses influenced by different option of landscape management

67%

Jadczyszyn J.

Bibliotheca Fragmenta Agronomica

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1997

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tom 2A

Ograniczanie wyników

Zawartosc azotu azotanowego w gleboko odwodnionych glebach torfowo-murszowych

Effects of vegetation cover and slope length on nitrogen and phosphorus loss from a sloping land under simulated rainfall

Quantification and comparison of ecosystem services of grasslands versus another fodder crop (maize) based on mineral nitrogen content in the 60-90 cm soil layer

The impact of nitrogen cycle in agriculture on the environmental quality

Influence of some soil chemical and physical properties on the ammonium nitrogen leaching and ammonia volatilization in the laboratory experiment

Mineral nitrogen content in the 60-90 cm layer of grassland soils relative to other fodder crops, way of managing agricultural lands and farming intensity

Nitrous oxide emission from grassland in different management conditions [fertilization regimes]

Evaluation of soil losses influenced by different option of landscape management