Field of activity 5: management and quality assurance of farm manure
Another focus is the subject of “nutrients“. The nutrient report of the Chamber of Agriculture Lower Saxony and the basis monitoring of the State Office for Mining, Energy and Geology (LBEG) come to similar results despite various methods. In accordance with this, the nutrient surpluses (manure, fermentation residues etc.) in Weser-Ems are different at partial-space level, however, too high in the entire region. There is not only a problem of distribution but also of amounts.
In addition to the problem of regionally increased nitrate values in the ground water further intensifications can be expected for the use of phosphorus. As early as today phosphorus is the first limiting factor in many enterprises producing pigs.
The groundwater contamination must be regarded critically like in large parts of Lower Saxony. The water associations refer to the necessity of improving the water quality in compliance with the European Water Framework Directive (EU-WRRL). Thus, a central challenge for the acceptance and economic efficiency of bio-economy in Weser-Ems is an optimisation of nutrient economy.
The plant cultivation knowledge and the technical possibilities exist in order to avoid a groundwater contamination with nutrients. The problem for the livestock-holding operations remains to release nutrients which cannot be appropriately used (nutrient surpluses). Currently there is too little transparency and structure in this complex of themes. The lack of information about contents and nutritional values of the manure, the lack of storage capacities and acceptance problems in the absorbing agricultural regions complicate their tradability. The costs related with the manure release and/ or processing create further restrictions for livestock-holding operations.