Factors affecting the c:N ratio in post-harvest residues and their practical impact
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Factors affecting the c:N ratio in post-harvest residues and their practical impact
Original language description
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.
Czech name
—
Czech description
—
Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
40101 - Agriculture
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management
ISBN
978-619740876-8
ISSN
13142704
e-ISSN
—
Number of pages
7
Pages from-to
209-216
Publisher name
Surveying Geology & Mining Ecology Management (SGEM)
Place of publication
Albena
Event location
Albena, Bulharsko
Event date
Jan 1, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—