Evaluation of nitrogen balance at different scale in Hokkaido dairy farming

New dairy system in Hokkaido, Japan [TMR system]

• The farms which joining TMR (total mixed rations) systems grow (1)corn and grass on their fields. However, harvesting and utilization are done as a community basis.

• TMR centre make high nutrient feed (= (2)TMR) by mixing forage and imported feed and sell to farms.

• The (3)manure which was produced in each farm is centred in three biogas plants and the by-product (4)digestate and fertilizer were sprayed to farms.

• The N flow within the farm become more complicated