Naslov
Maturity and stability of composted pig manure used as a growing media

Autori
Lončarić, Zdenko ; Karalić, Krunoslav ; Popović, Brigita ; Bukvić, Gordana ; Vukobratović, Marija ; Rekasi, Mark

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts of oral presentations and posters of International Symposium on Growing Media, Composting and Supatrate Analysis. / Martinez, Xavier F. - Barcelona : International Society for Horticultural Science, 2011, 118-118

Skup
International Symposium on Growing Media, Composting and Supatrate Analysis.

Mjesto i datum
Barcelona, Španjolska, 17.10.2011. - 21.10.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
separated pig manure ; C/N ratio ; respiration ; lettuce ; vermicompost

Sažetak
Separated pig manure (SPM) can be composted and afterwards used as a growing media for seedling production. Hence, separated pig manure was passive composted in small piles and analysed at four different maturity stages (after 0, 30, 90 and 180 days of composting). Different physical (dry matter, ash, organic matter) and chemical (pH, EC, total C, total N, C/N ratio, and nutrient concentration) properties were determined to describe maturity and stability of composted SPM. Also, vermicomposted cow manure (VCM) and commercial potting mix (CPM) were compared to composted pig manure. The comparison was made by growing 14-days old seedlings of lettuce in different growing media: fresh pig manure, 30, 90 and 180 days old composted SPM, VCM, CPM, and 9 different 1:1 mixtures (VCM+CPM, 4 mixtures of SPM and VCM, 4 mixtures of SPM and CPM). Composting of SPM during 180 days resulted in organic matter decreasing (87, 4 to 56, 8 %), ash increasing (12, 6 to 43, 2 %), and pH decreased from 8, 24 to 6, 29. At the same time total C decreased from 42, 0 to 29, 5 %, total N increased from 2, 26 to 2, 94 %, and C/N ratio significantly decreased from 18, 6 to 10, 0 which indicates higher compost stability. Respiration rate of unstable fresh manure was 10, 9 mg CO2-C g-1 substrate-C day-1, and decreased to 6, 9 mg, 4, 9 mg and 1, 4 mg confirming the increased stability of composted SPM. The highest lettuce fresh mass was obtained on VCM as growing media, significantly lower at CPM, even lower on mixtures of SPM+CPM or SPM+VCM. The lowest lettuce mass was determined on SPM as growing media, but maturity of SPM increased lettuce mass since on fresh SPM lettuce didn’t grow and the highest mass was on SPM after 180 days of composting.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA