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Trainings:

SExI FS-Model, more...
Olympe, more...
Data Management, more...
Technical Field Trainings, more...

Students:

Water status and radiation environment in rubber (Hevea brasiliensis) systems: A comparison between monoculture and mixed rubber-Acacia mangium plots, by Ni'matul Khasanah
Diversity of ectomycorrhizal and root endophyte fungi at various land use type sites in Jambi, by Made Hesti Lestari Tata
Analysis and characterization of rubber tapping systems in West Kalimantan, by Caroline le Foll
Analysis and characterization of farming rubber systems in Kalimantan and Jambi, by Laure Martin
Respon petani partisipan dan non partisipan terhadap proyek wanatani karet rakyat di Kalimantan Barat, by Neni Agustiani
Karakteristik usahatani pada sistem wanatani berbasis karet di kabupaten sanggau, by Rama Suhatini
Kajian pengembangan kelompok usahatani pembibitan karet klon unggul di Kalimantan Barat, by Median Dwi Sulistyowati
Analisis efisiensi beberapa saluran tataniaga bahan olah karet (Bokar) petani partisipan sistem wanatani karet rakyat, Propinsi Kalimantan Barat, by Mayasari
Studi potensi tanaman obat pada sistem wanatani berbasis karet dengan pola hutan karet produktif di Kabupaten Sanggau, by Bina Swasta Sitepu
Secondary succession and its role in improved rubber agroforestry systems in West Kalimantan , by Laura Ihalainen
Intensification of timber production in traditional rubber agroforest systems, by Xavier Rossi

TRAININGS

SExI FS-Model

The SExI forest simulator focuses on tree-tree interactions in a mixed multi-species agroforest. The high level of structural complexity of such traditional agroforestry systems defies classical forestry approaches when it comes to optimizing management practices. To cope with this complexity, farmers have adopted a tree-by-tree management approach, which is closer to gardening than to any usual tropical forestry or estate crop management model. Individual tree care and regular tending takes the form of seedlings transplanting, selective cleaning and felling, adjusted harvesting intensity.

Farmers’ approach appears to be in line with two basic tenets of biology: first, individuals are all different with behavior and physiology that result from a unique combination of genetic and environmental influence, and second, interactions are inherently local. Based on the same premises a computer model was developed to explore different management scenarios.

The model uses an object-oriented approach where each tree is represented by an instance of a generic class of tree. The simulated object trees, mimicking real trees, interact through modifying their neighbors ' environment. These modifications are mediated through two major resources: space and light. A 3D representation of a one-hectare plot of forest serves as the grounds for the simulation of this competition.

The major objective of such a model is to get a coherent dynamic representation of a complex system, where complexity refers here to the assemblage of locally interacting individuals with different properties more. The model provides insight on what are the critical processes and parameters of the dynamic of the system. It should also allow exploring prospective management scenarios, help assessing the relevance of present management techniques etc.

The SExI-FS will be applied to simulate growth of various species mixtures with rubber (Hevea brasiliensis) in the context of Jambi, West Kalimantan , South Sumatra and South Thailand under the CFC funded rubber agroforestry project. Colleagues from partner institutions are invited to a four day workshop-meeting to learn about and test the SExI-FS model. Dr. Gregoire Vincent of IRD (France) and Mr. Degi Harja of ICRAF will provide the orientation and training. Around fifteen people are expected to attend this event.

The first SexI-FS workshop was held in IRRI Sembawa Palembang on 10-13 May 2005. Participants from CFC Partners in Indonesia (ICRAF Bogor, ICRAF Muarabungo, ICRAF Sanggau , and IRRI Sembawa) were joining the workshop. The training was held in 3 days for introduction, field experiments and exploring management scenarios. The last 1 day, there was field visit to the rubber plantation of IRRI Sembawa.

The second SExI-FS workshop was held in Prince of Songkla University, Thailand from 24 to 26 August 2005 with 20 participants mostly are lecturers, students and some of colleagues of the CFC project. After the workshop the participants spent 2 days visiting rubber based and fruit based mixed systems in Satun and Pattalung provinces. From there, they were reviewing some practical issues on data acquisition methodology for model calibration to Thai context. A part from the workshops, presentation was also held in Kasetsart University, Bangkok to introduce the model to some of colleagues, lecturers and students and get a good response. It’s expected that the collaboration with the universities in Thailand will be continued and invited some of their students to visit Indonesia and see the implementation of the model in Indonesia case.

Attached in PDF file the Materials of the SexI Model (Documentation, Userguide (part1 and part2) and Callibration Procedures)