diplomsko delo
Povzetek
Živinoreja je ena najhitreje rastočih kmetijskih panog. Njeno rast spodbuja vedno večja poraba mesa, ki je posledica rasti prihodkov in svetovne populacije. Vzporedno s porabo se veča tudi prireja mesa, največji razmah je doživela prireja monogastričnih živali. Povečana pridelava pomeni povečane negativne vplive, ki jih ima živinoreja na okolje. Mednje spadajo izčrpavanje ter degradacija tal, vode in biotske pestrosti ter izpusti toplogrednih plinov (TGP). Hkrati pa posledice uničevanja ekosistemov in podnebnih sprememb, ki jih povzroča tudi prireja mesa, to dejavnost vse bolj omejujejo. Ker se pričakuje, da bosta poraba mesa in svetovno prebivalstvo rasla še naprej, se mora učinkovitost rabe naravnih virov z ustreznimi praksami izboljšati, vpliv sektorja na okolje pa se mora zmanjšati. Živinoreja proizvede 14,5 % izpustov TGP antropogenega izvora. Najpomembnejši TGP v živinoreji so ogljikov dioksid, metan in didušikov oksid. V največjih količinah se sprošča CH4, sledijo mu izpusti CO2 in N2O, v skoraj enakih deležih. Do izpustov prihaja tekom celega procesa pridelave: zaradi spreminjanja rabe tal, med pridelavo krme, iz dušikovih in živinskih gnojil, med enterično fermentacijo ter zaradi rabe energije. Količine in lastnosti izpustov se razlikujejo glede na vrsto živine, rejne sisteme ter regijo prireje. Intenzivnost izpustov variira tako med kot tudi znotraj teh dejavnikov, zato so možnosti zmanjšanja izpustov TGP v prireji mesa številne.
Ključne besede
živinoreja;prireja mesa;izpusti toplogrednih plinov;podnebne spremembe;kmetijske prakse;gnoj;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2019 |
Tipologija: |
2.11 - Diplomsko delo |
Organizacija: |
UL BF - Biotehniška fakulteta |
Založnik: |
[M. Topole] |
UDK: |
504.7:636:551.586(043.2) |
COBISS: |
9293177
|
Št. ogledov: |
635 |
Št. prenosov: |
198 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Meat production as a major source of greenhouse gas emissions |
Sekundarni povzetek: |
Livestock production is one of the fastest growing sectors in agriculture. It is driven by meat consumption increase, which is the result of higher income and rise in global population. Greater demand for meat causes increase in meat production, which has especially been emphasised in monogastric sector. The larger scale of meat production is reflected in larger effects that livestock production causes to the environment. Among these negative effects soil and water degradation, biodiversity loss and greenhouse gas (GHG) emissions are the most pronounced. Meat production is in turn affected by ecosystem degradation and climate change, which are caused by the meat production sector itself. Meat consumption and global population are expected to continue to grow. In this sense it is important to improve resource use efficiency, which can be accomplished by applying appropriate practices, thereby decreasing the effects of this sector on the environment. Livestock production accounts for 14.5 % of anthropogenic GHG emissions. Most important GHGs in livestock production are carbon dioxide, methane and nitrous oxide. The largest relative emissions are those of CH4, followed by CO2 and N2O, the latter two sharing an almost equal part. Emissions occur along the entire production chain, as a result of land use change, due to feed production, nitrogenous fertilizer and manure use, during enteric fermentation, and from energy use. Amounts and relative contributions of emissions depend on livestock species, production systems and production region. Emissions vary greatly between and within these emission factors suggesting numerous options to mitigate GHG emissions. |
Sekundarne ključne besede: |
livestock production;meat production;greenhouse gas emissions;climate change;agricultural practices;manure; |
Vrsta dela (COBISS): |
Diplomsko delo/naloga |
Študijski program: |
0 |
Konec prepovedi (OpenAIRE): |
1970-01-01 |
Komentar na gradivo: |
Univ. v Ljubljani, Biotehniška fak., Oddelek za agronomijo |
Strani: |
VI, 18 str. |
ID: |
11228355 |