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Baseline study on Animal waste organic matter production by pig farms

Preliminary census and an official data analysis at the level of the province to sum-marise the existing information on pig production and future policies.

Operational typology depending on various criteria explaining the current production and availability of animal-produced organic matter

1. characterise the observed swine population, farming systems and management practices and its variability, e.g. herd composition; numeric productivity, zootechnical performances and management, feeding practices; production costs and perception of pig farmers of the envi-ronmental issue,
2. build an operational typology of sampled pig farmers
3. assess the opportunity costs for an internal use of pig manure (for crops/aquaculture/pig integrated systems) and the current prices for pig manure in the province.
4. quantify each pig farmers’ categories at the provincial level according to the defined ty-pologies and the official census.

Appraisal of rejected effluents produced by each category of pig farmers

1. an animal-waste sample collection campaign and specific analysis on slurries that will clarify the quality of animal-waste and its variability and will allow determining the amount of produced N and P nutrients;
2. technical expertise that will assess the variability on the slurry quality (N/P contents) depending on the observed technical practices (feeding management, water use for animal drinking and washing, housing), and storage facilities and technological manure processing.

Implementation of a Pro-Active Conciliation Tool (PACT) method applied on collective identification of individual constraints, identification of other stakeholders and their existing or possible relationships, opinions and personnal perceptions about the local animal-waste pollution issue. It will involve a ‘local expert’ committee gathering concerned stakeholders and policy makers.

Demand and requirements of nutrients for crops and for aquaculture

Creation of a Meta-database on NPK balance in Crops at commune level

Identification of fish ponds farming and their practices in manure-based feeding management

Economical appraisal of commercial relationships between manure producers, retailers and consummers , i.e. vegetable farmers.

Analysis and Representation of animal-waste organic matter’s flows at the provincial level

In a circumstance where the existing land use maps are outdated this is the only source of information allowing understanding the dynamic of the urban and agricultural areas. An indicator of pressure on the environment will be set up. It will describe also the decreasing of organic matter spreading areas:

1. Image data collecting to fit the Crop Curve (rice, maize and soja) in study area for the interested periods
2. Image Processing
3. Integrating image processing results into a GIS database.

The GIS will be designed to receive the different kind of information from other components. It will gather:

1. Quantitative information: number of units, density, size, estimated effluents
2. Digitising paper maps
3. model for the on-going strategies for pig production and manure management

to optimise the animal organic matter production and consumption considering various constraints: adequacy between pig effluents and crops/fish ponds requirements, periods, distance, costs. With data from observed farming typologies and decision rules, this spatial model will identify possible transfers with a mapping considering OM production/demand balance, and then the amounts of animal waste needed to be spread as well as storage needs and associated technologies. A hierarchy will be established between all the parameters with weightages and a map of the environmental risk will be produced.