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Effects of farmyard manure compost and biodynamic preparations

Long-term trial at IBDF Darmstadt (since 1980)


1988-1991 Fertilizer and nutrient amounts

Second period (research focus: Soil biology)


Nutrient amounts (kg ha-1) applied yearly with farmyard manure with (CMBD) and without (CM) biodynamic preparations and with mineral fertilizer (MIN) to winter rye.
 
  Low Medium High
N  P2O5 K2O N  P2O5 K2O N  P2O5 K2O
CM 1st app. 60 47 58 80 63 78 100 78 98
  2nd app. - - - 20 11 31 40 22 59
CMBD 1st app. 60 47 57 80 62 76 100 78 95
  2nd app. - - - 20 11 31 40 22 62
MIN 1st app. 60 50 75 80 75 100 100 100 125
  2nd app. - - - 20 - - 40 - -
  

Because fertilizer amounts were calculated on the basis of nitrogen contents alone, the amounts of phosphorus and potassium applied in the manure treatments varied from year to year depending upon the manure properties in a given year. The data presented in the table for CM and CMBD are averages of the years 1988-91; in MIN the same amounts were applied every year.
 
Application dates: To winter rye, manure was applied before sowing and mineral fertilizer in early spring. The second N application was in mid-March (CM, CMBD) and in mid-May (MIN). The second application was calcium ammonium nitrate in MIN, and castor meal (1988 and 1989) or liquid manure (1990 and 1991) in the organic treatments.

 

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