
Title: Miss
Name: Qinhua Shen
Department: IAE
Organisation: Massey University
Email Address: q.shen@massey.ac.nz
Address: 8 Heatley Ave
Phone Number: 0223072232
Notes: no
Poster Abstract: Soil organic matter (OM) is a continuum of decomposing organic compounds, from biopolymers to molecules that decrease in size and become more oxidised and water-soluble as decomposition. A large fraction of OM consists of decomposition products of microbes, which can then become chemically stabilised and protected against further microbial decomposition through interaction with nano-sized minerals. Particulate OM representing the fraction of OM that retains some of the original plant structure can be physically-protected within soil aggregates. Except for carbonised material, the C fractions that are considered to have the largest residence times (RT) in soil are those chemically associated with mineral surfaces and metal cations forming organo-mineral complexes in a discrete zonal sequence, similar to an â��onion-typeâ�� structure. In this study we have identified the carbon fractions associated to different layers of this structure for major New Zealand soil types and looked at how land use influences their stability.
Science Workshops: yes

NZAGRC Updates: yes
