Raupp, Dr Joachim and Oltmanns, Meike (2002) Fractions of particulate organic matter in soils depending upon farmyard manure and mineral fertilization. In: Proceedings 14th IFOAM Organic World Congress, p. 25.
In a long-term fertilization trial particulate organic matter (POM) was investigated after 20 years of farmyard manure vs. mineral fertilization at different levels with the method of Meijboom et al. (1995). The organic matter was separated with sodium polytungstate (Magid et al., 1996; Six et al., 1999) into a light (p <1.13 g cm-3), medium (1.13-1.37 g cm-3) and heavy (p >1.37 g cm-3) fraction.
The organically fertilized plots had lower contents of the light fraction (0.73 - 0.78 g kg-1 dry matter on average of all fields) compared to the mineral treatment (0.95 g kg-1 TS). This gives a hint that organic residues are decomposed faster in the manure fertilized soil, according to the higher biological activity found earlier in this treatment. The heavy fraction of POM showed the same distribution as the Corg values being higher with manure fertilization (10.7 - 11.5 g kg-1 dm) than with mineral fertilizer (7.8 g kg-1).
|EPrint Type:||Conference paper, poster, etc.|
|Type of presentation:||Paper|
|Keywords:||soil organic matter, macroorganic matter, farmyatd manure, mineral fertilization, biodynamic|
|Subjects:|| Soil > Nutrient turnover|
Soil > Soil quality > Soil biology
Crop husbandry > Composting and manuring
|Research affiliation:||Germany > Institute for Biodynamic Research - IBDF|
|Deposited By:||Raupp, Dr. Joachim|
|Deposited On:||25 Jul 2005|
|Last Modified:||12 Apr 2010 07:27|
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