Pl an t pr od uc ti on G ra ss la nd The demand to use agricultural land more efficiently and sustainably is gaining in importance One approach is to better adapt fertilization of grasslands to the nutrient requirements of the plants There is little actual data on yields from permanent grassland yet these are a prerequisite for correct fertilizer quantities That is why it is necessary of record actual yields from fields and nutrient balances OPTIMAL FERTILIZATION TIME IN SPRING It is also important to fertilize at the right time Nutrients should be available to plants in spring at the beginning of continuous grass growth Continued grass growth begins when the adjusted temperature sum for grasland is reached In order to obtain information about this point in time in Schleswig Holstein data from six agricultural holdings were recorded and evaluated RESULTS As a guideline a grassland temperature sum of 200 C is taken as the beginning of continuous grass growth This value was adjusted for the different grassland regions in Schleswig Holstein The site specific guideline values as well as the current grassland temperature total can be called up in a web app developed in the Project thus helping to optimize spring fertilization In addition by weighing yields from entire grassland areas relationships between actual nutrient inputs and outputs could be shown In this way businesses can obtain important information about starting times for optimizing nutrient management BOOKLET Free booklet Grünlanddüngung im Frühjahr worauf kommt es an Grassland fertilization in spring what is important from Malin Hanne Bockwoldt mbockwoldt lksh de or Prof Dr Con rad Wiermann conrad wiermann fh kiel de WEB APP The web app Wann wächst Gras When does grass grow provides information on all grassland locations in Schleswig Holstein It helps the farmer to optimize grassland fertilization based on knowing the start of vegetation growth The app can found at www lksh de and www eip agrar sh de FINAL REPORT www eip agrar sh de en eip innovationprojects 1st call grassland nutrient management CONTACT PERSON Malin Bockwoldt phone 49 4331 9453 317 mbockwoldt lksh de ADJUST FERTILIZATION TO THE YIELD Nutrient management of grasslands Der Aufwuchs wird gemessen und gewogen Das gibt Aufschluss über den Ertrag und die passende Düngung 26

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