Gómez-Muñoz B, Case S D C, Jensen L S
Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark.
Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark.
J Environ Manage. 2016 Mar 1;168:236-44. doi: 10.1016/j.jenvman.2015.12.018. Epub 2015 Dec 21.
The combined effects of pig slurry acidification, subsequent separation techniques and biochar production from the solid fraction on N mineralisation and N2O and CO2 emissions in soil were investigated in an incubation experiment. Acidification of pig slurry increased N availability from the separated solid fractions in soil, but did not affect N2O and CO2 emissions. However acidification reduced soil N and C turnover from the liquid fraction. The use of more advanced separation techniques (flocculation and drainage > decanting centrifuge > screw press) increased N mineralisation from acidified solid fractions, but also increased N2O and CO2 emissions in soil amended with the liquid fraction. Finally, the biochar production from the solid fraction of pig slurry resulted in a very recalcitrant material, which reduced N and C mineralisation in soil compared to the raw solid fractions.
通过一项培养实验，研究了猪粪酸化、后续分离技术以及从固体部分生产生物炭对土壤中氮矿化、氧化亚氮（N₂O）和二氧化碳（CO₂）排放的综合影响。猪粪酸化提高了土壤中分离出的固体部分的氮有效性，但对N₂O和CO₂排放没有影响。然而，酸化降低了液体部分的土壤氮和碳周转。使用更先进的分离技术（絮凝排水＞倾析离心机＞螺旋压榨机）增加了酸化固体部分的氮矿化，但也增加了用液体部分改良的土壤中的N₂O和CO₂排放。最后，从猪粪固体部分生产生物炭得到了一种非常难分解的材料，与原始固体部分相比，它减少了土壤中的氮和碳矿化。
