Aggregation stability and organic carbon fraction in a soil amended with some plant residues, nanozeolite, and naturalzeolite

Abstract This research is aimed to study comparison ofthe effects of applied nanozeolite and zeolite on aggregationand organic carbon (OC) in each aggregate size fractionin treated soil with different levels of some plantresidues and incubation for 90 days. The analysis of varianceshowed that the effects of applied nanozeolite, zeolite,plant residues, and their interaction and incubation timeson MWDw and OC in aggregate size fractions were statisticallysignificant. The results showed that MWDw andOC contents in each aggregate size fraction increased withthe additions of nanozeolite, zeolite, and plant residues.This study also revealed that nanozeolite and alfalfa strawwere more effective for increasing the MWDw and OCcontents in aggregate size fractions than zeolite and wheatstraw, respectively. In other words, higher percentage nanozeolite,zeolite, and plant residues resulted in increasingthe MWDw and OC in aggregate size fractions. Thehighest amounts of OC were observed in A and B compoundscompared with the control and other treatments.However, the comparison of OC contents in all the treatmentsshowed that proportion of nanozeolite for increasingthe OC content was greater than that of zeolite. Also thehighest OC contents were observed in larger aggregate sizefractions. The MWDw and OC contents increased with theincreasing days of incubation in treated soil. Thus, it wasconcluded that compound A can be more effective toimprove the soil carbon sequestration.