best available technologies for manure treatment - Baltic Green Belt

Best Available Technologies for manure treatment baltic sea 2020
Best Available Technologies for manure treatment baltic sea 2020
ANNEX E: TABLES WITH SHORT DESPRIPTION OF LIVESTOCK MANURE TREATMENT TECHNOLOGIES
Best Available Techniques for manure treatment - for intensive rearing of pigs in Baltic Sea Region EU Member States Technical Report "Best Practice Manure Handling, Phase 2"
Ref No. 112 P-index
Brief description Description of the effect on leaching (positive or negative) of N and P
The purpose of a P index is to assess the risk of P delivery to surface waters. The index
is a tool to help conservation planners, landowners/land users and others to evaluate
the current risk from P reaching surface water from a specific site, and to determine
factors which dominate the risk due to P transport to surface waters. It will also assist
landowners/land users in making management decisions to reduce the risk.
The P-index has an erosion component, which considers shell and rill erosion, P
enrichment, total soil P, filter strip, sediment delivery, distance to a stream, and the
long term biotic availability of particulate P in surface water ecosystems. . A runoff
component considers water run-off based on a modification of the runoff curve
number, soil tests, rate time and method of P application. An internal drainage
component considers the presence of tiles, water flow to tile lines, surface water
recharge to subsurface flow, and soil tests.
The P-index is a tool, that directly can assess the risk of P leaching, and therefore
whether there is a need for not spreading livestock manure on a certain field.
Establishing of non-cultivated buffer zones along streams, and terraces in the steep
fields, would dramatically reduce the P-index.
The whole index is a formula, which is easily calculated annually once the specific
parameters for the given field have been determined.
Research
Pilot
Practice
Innovation stage
Investment price,
Basic Variable
Operational
costs,
per tonnes
Low Low Low
per kg
saved N or P
leaching
Complexity of
implementation
Major references
1: Mallarino et al., 2005
2: Natural Resources Conservation Services (NRCS), 2004
Condition for
leaching
reduction effect
High P-index
levels
Certainty of information
Prices High
Effect on
leaching
High
Low Low
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