Show simple item record

dc.creatorZhao,Rudong
dc.creatorColes,Neil
dc.creatorWu,Jiaping
dc.date2015-12-01
dc.date.accessioned2019-04-24T21:20:11Z
dc.date.available2019-04-24T21:20:11Z
dc.identifierhttps://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000500012
dc.identifier.urihttp://revistaschilenas.uchile.cl/handle/2250/56107
dc.descriptionBiochar has been attracting increasing attention for its potentials of C sequestration and soil amendment. This study aimed to understand the effects of combining biochar with additional external N on soil C mineralization. A typical red soil (Plinthudults) was treated with two biochars made from two types of plantation-tree trunks (soil-biochar treatments), and was also treated with external N (soil-biochar-N treatments). All treatments were incubated for 42 d. The CO2-C released from the treatments was detected periodically. After the incubation, soil properties such as pH, microbial biomass C (MBC), and microbial biomass N (MBN) were measured. The addition of biochar with external N increased the soil pH (4.31-4.33) compared to the soil treated with external N only (4.21). This was not observed in the comparison of soil-biochar treatments (4.75-4.80) to soil only (4.74). Biochar additions (whether or not they were associated with external N) increased soil MBC and MBN, but decreased CO2-C value per unit total C (added biochar C + soil C) according to the model fitting. The total CO2-C released in soil-biochar treatments were enhanced compared to soil only (i.e., 3.15 vs. 2.57 mg and 3.23 vs. 2.45 mg), which was attributed to the labile C fractions in the biochars and through soil microorganism enhancement. However, there were few changes in soil C mineralization in soil-biochar-N treatments. Additionally, the potentially available C per unit total C in soil-biochar-N treatments was lower than that observed in the soil-biochar treatments. Therefore, we believe in the short term, that C mineralization in the soil can be enhanced by biochar addition, but not by adding external N concomitantly.
dc.formattext/html
dc.languageen
dc.publisherInstituto de Investigaciones Agropecuarias, INIA
dc.relation10.4067/S0718-58392015000500012
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceChilean journal of agricultural research v.75 n.4 2015
dc.subjectBiochar
dc.subjectcarbon sequestration
dc.subjectnitrogen
dc.subjectsoil amendment
dc.titleSoil carbon mineralization following biochar addition associated with external nitrogen


This item appears in the following Collection(s)

Show simple item record