Available Nitrogen in the Surface Mineral Layer of Natural Meadows

To chci

Based on a greenhouse experiment, we evaluated nitrogen availability in the surface mineral layer of soil under various natural meadow stands by analyzing the following soil characteristics: total organic C, total N, initial content of easily available N inorganic forms, mineralized N content obtained by aerobic and anaerobic incubations and A-value. The experiment was performed on a test plant and through the application of urea enriched with 5.4 % 15N. The investigated soils under natural meadows are characterized with comparatively high mineralization intensity and high N availability indices. Contents of mineral N produced by aerobic incubation and the intensity of the mineralization correlate with the total organic C in the soil and the total N in the soil. Correlation of the availability index of the soil N produced by aerobic incubation with the total organic C and the total N in the soil under natural meadows is almost linear (r = 0.9981 and r = 0.9997, respectively). Contents of mineral N produced by anaerobic incubation, as well as the corresponding N availability and mineralization intensity indices correlate poorly with the mentioned parameters. Efficiency of nitrogen utilization from the applied N-fertilizer by the test crop varies within a wide range of values and correlates with the biomass yields of the test crop. … celý popis

Podrobná bibliografie

Hlavní autor

Željko S. Dželetović

Další autoři

Nevena Lj. Mihailović

Typ dokumentu

Články

Fyzický popis

5 ilustrací

Publikováno v

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis. -- ISSN 1211-8516. -- Roč. 65, č. 5 (2017), s. 1483-1492

Témata

Serbia

PROTECTED CULTIVATION

GREENHOUSES

RANGELAND SOILS

CHERNOZEMS

CAMBISOLS

GLEYSOLS

SOIL PROFILES

SOIL TEXTURE

SOIL CHEMICOPHYSICAL PROPERTIES

NUTRIENT AVAILABILITY

SOIL ORGANIC MATTER

NITROGEN

CARBON

Nitrogen mineralization

NITROGEN FERTILIZERS

UREA

POT EXPERIMENTATION

nutrient utilization

Use efficiency

CROP YIELD

BIOMASS

nutrient balance (plants)

Srbsko

pěstování rostlin v řízených podmínkách

skleníky

luční půdy

černozemě

kambisoly

glejové půdy

půdní profily

půdní textura

chemickofyzikální půdní vlastnosti

dostupnost živin

organická hmota v půdě

dusík

uhlík

mineralizace dusíku

dusíkatá hnojiva

močovina

anaerobióza

aerobióza

nádobové pokusy

využití živin

účinnost využití

výnos plodin

biomasa

bilance živin (rostlin)

Popis jednotky

5 tabulek

Bibliografie

Seznam literatury na s. 1491-1492,