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Einfluss der ökologischen Bewirtschaftung auf die Nitratstickstoffgehalte im Boden

Gruber, Harriet; Thamm, Uwe and Michel, Volker (2004) Einfluss der ökologischen Bewirtschaftung auf die Nitratstickstoffgehalte im Boden. Mitteilungen der Landesforschungsanstalt für Landwirtschaft und Fischerei Mecklenburg-Vorpommern, 33.

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Summary

The following paper discribe the influence of ecological managed systems on contents of nitrate-nitrogen in soils. From 1993 to 2003 in a six-year crop rotation in the location of Gülzow (Mecklenburg-Vorpommern) samples of soil were taken with an soil auger in a depth between 0 and 90 cm. Nitrate-nitrogen contents was analyzed by hydrazin reduction in an analysing automat (SKALAR). For statistical evaluation SAS (Statistical Analysis System) and for clearing of unorthogonal data procedure MIXED of PIEPHO and MICHEL (2001) were used.
The results show that contents of nitrate-nitrogen in autumn and spring are lower for organic management than for conventional. Nitrogen losses during winter are subjected to heavy annual variations. High contents of nitrate-nitrogen in the end of vegetation resulted in high losses on sandy soils in winter. The amount of contents of nitrate-nitrogen in the end of vegetation is heavily influenced by the crop rotation and the management connected with this crop. Danger of high losses of nitrate-nitrogen during the winter is especially big in the growing of winter grain with legumes grown before. Losses through leaching can be decreased by catch crops and by high degree of soil covering for example with clover and grass.


EPrint Type:Journal paper
Keywords:Nitratstickstoff, Auswaschung, Fruchtfolge, ökologischer Landbau
Subjects: Soil > Nutrient turnover
Crop husbandry > Crop combinations and interactions
Environmental aspects > Air and water emissions
Research affiliation: Germany > Federal States > Mecklenburg-Vorpommern > State Research Centre
Deposited By: Gruber, Dr. Harriet
ID Code:5129
Deposited On:05 Aug 2005
Last Modified:12 Apr 2010 07:31
Document Language:German - Deutsch
Status:Published
Refereed:Not peer-reviewed
Additional Publishing Information:ISSN 1618-7938

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