Methodological approach for development of manure reference values | Daži kūtsmēslu normatīvu izstrādes metodiskie aspekti
2008
Karklins, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Lipenite, I., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture
Development of reference values for manure mass balance and NP content calculations has high priority within the EC considering environmental problems. The objective is to harmonize the calculation approach and methods within the EC member States necessary for establishment of common environmental standards and unified risk assessment. Afterwards such reference values are incorporated into the national legislative acts to set up the framework for control and monitoring of NP loads from farming activities. The objective of the research was to test the recommended method of EEC for NP excretion by animals using animal feed norms, typical of Latvia, for calculations. The obtained results for dairy and beef cattle and pigs show a good agreement between references values used in other EC countries if NP consumption-excretion model is applied. Therefore not significant differences between Latvia and other EC countries in terms of manure standards and animal unit definitions might be realistic.
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