PhD project: Biochemical cycling of soil sulphur (S) in agro ecosystem

Instituttt for plante- og miljøvitenskap

PhD student: Zhihui Yang
Supervisor(s): Bal Ram Singh, Sissel Hansen (Bioforsk)
Duration: 2003-2006

In organic farming system, Crop residue S is one of the sources of crop S requirement. Biochemical process involved in the S transformation is important not only for available S supply, but also for the maintenance of soil fertility. Through investigating the turnover of native organic S, the transformation of residues and S pool changes and S availability of organic fractions in different long-term agro ecosystems, a strategy of sustainable management of soil S can be suggested.

Objectives:
1. Assess long-term effects of agricultural management practices in organic farming system on the soil S pools, both physical pools in different aggregates, and chemical pools in different chemical forms as well as functional groups.
2. Study S transformation of residues management
3. Assess mineralization intensity and capacity of inorganic S
4. Investigate bioavailability of different fractions of organic S.


Updated: 03.04.06
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