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Factors affecting the c:N ratio in post-harvest residues and their practical impact

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26296080%3A_____%2F19%3AN0000095" target="_blank" >RIV/26296080:_____/19:N0000095 - isvavai.cz</a>

  • Výsledek na webu

    <a href="https://www.researchgate.net/publication/334734444_FACTORS_AFFECTING_THE_C_N_RATIO_IN_POST-HARVEST_RESIDUES_AND_THEIR_PRACTICAL_IMPACT" target="_blank" >https://www.researchgate.net/publication/334734444_FACTORS_AFFECTING_THE_C_N_RATIO_IN_POST-HARVEST_RESIDUES_AND_THEIR_PRACTICAL_IMPACT</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.5593/sgem2019/3.2/S13.028" target="_blank" >10.5593/sgem2019/3.2/S13.028</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Factors affecting the c:N ratio in post-harvest residues and their practical impact

  • Popis výsledku v původním jazyce

    C:N ratio in after-harvest residues (including straw) decides on speed and intensity of decomposition. In one-year field small-plot experiment, there were included these variants: (1) monoculture of winter wheat fertilized with 140 kg N/ha; (2) monoculture of winter pea not fertilized with nitrogen; (3) mixed culture of both these crops in 1:1 ratio fertilized with 112 kg N/ha; (4) mixed culture of the crops in 1:1 ratio fertilized with 70 kg N/ha; (5) mixed culture of both crops in 1:1 ratio not fertilized with nitrogen. After harvest, C:N ratio in straw ranged in the variants as following: (1) 49:1; (2) 25:1; (3) 39:1; (4) 51:1; (5) 41:1. Thus, decisive factors of C:N ratio are botanical composition of the stand, the level of nitrogen fertilization, and also influence of the year (especially precipitation). Sufficiency of water is necessary either for nutrients uptake (nitrogen) from soil, and either for their transport from roots to stems, leaves and grain. Within wide C:N level in cereal straws (80-100:1), the recommended application dose is 10 kg N/1 t of straw in order to decrease it to optimum C:N of 20-30:1 (from the point of successful decomposition). With knowledge of the C: N ratio, a farmer can avoid both, nitrogen overdosing or its deficiency which has economic and environmental impacts. In particular, the N over-fertilization leads to rapid decomposition (mineralization) of the primary organic matter (straw) and subsequently to releasing ammonium N, after nitrification, and easily leachable nitrate N. Therefore, it is advisable to carry out an analysis of the post-harvest residues (straw) to determine total C and N content prior to their application into the soil in order to adjust the dose of the applied N.

  • Název v anglickém jazyce

    Factors affecting the c:N ratio in post-harvest residues and their practical impact

  • Popis výsledku anglicky

    C:N ratio in after-harvest residues (including straw) decides on speed and intensity of decomposition. In one-year field small-plot experiment, there were included these variants: (1) monoculture of winter wheat fertilized with 140 kg N/ha; (2) monoculture of winter pea not fertilized with nitrogen; (3) mixed culture of both these crops in 1:1 ratio fertilized with 112 kg N/ha; (4) mixed culture of the crops in 1:1 ratio fertilized with 70 kg N/ha; (5) mixed culture of both crops in 1:1 ratio not fertilized with nitrogen. After harvest, C:N ratio in straw ranged in the variants as following: (1) 49:1; (2) 25:1; (3) 39:1; (4) 51:1; (5) 41:1. Thus, decisive factors of C:N ratio are botanical composition of the stand, the level of nitrogen fertilization, and also influence of the year (especially precipitation). Sufficiency of water is necessary either for nutrients uptake (nitrogen) from soil, and either for their transport from roots to stems, leaves and grain. Within wide C:N level in cereal straws (80-100:1), the recommended application dose is 10 kg N/1 t of straw in order to decrease it to optimum C:N of 20-30:1 (from the point of successful decomposition). With knowledge of the C: N ratio, a farmer can avoid both, nitrogen overdosing or its deficiency which has economic and environmental impacts. In particular, the N over-fertilization leads to rapid decomposition (mineralization) of the primary organic matter (straw) and subsequently to releasing ammonium N, after nitrification, and easily leachable nitrate N. Therefore, it is advisable to carry out an analysis of the post-harvest residues (straw) to determine total C and N content prior to their application into the soil in order to adjust the dose of the applied N.

Klasifikace

  • Druh

    D - Stať ve sborníku

  • CEP obor

  • OECD FORD obor

    40101 - Agriculture

Návaznosti výsledku

  • Projekt

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2019

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název statě ve sborníku

    International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management

  • ISBN

    978-619740876-8

  • ISSN

    13142704

  • e-ISSN

  • Počet stran výsledku

    7

  • Strana od-do

    209-216

  • Název nakladatele

    Surveying Geology & Mining Ecology Management (SGEM)

  • Místo vydání

    Albena

  • Místo konání akce

    Albena, Bulharsko

  • Datum konání akce

    1. 1. 2019

  • Typ akce podle státní příslušnosti

    WRD - Celosvětová akce

  • Kód UT WoS článku