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Development of phosphatase and dehydrogenase activities in soils of annual cropland and permanent grassland in an organic farm

Ohm, M.; Paulsen, H.M.; Eichler-Löbermann, B. and Rahmann, G. (2013) Development of phosphatase and dehydrogenase activities in soils of annual cropland and permanent grassland in an organic farm. In: Løes, Anne-Kristin; Askegaard, Margrethe; Langer, Vibeke; Partanen, Kirsi; Pehme, Sirli; Rasmussen, Ilse A.; Salomon, Eva; Sørensen, Peter; Ullvén, Karin and Wivstad, Maria (Eds.) Organic farming systems as a driver for change, NJF Report, no. 9 (3), pp. 123-124.

PDF - Accepted Version - English
PDF - Presentation - English

Online at: http://www.njf.nu/filebank/files/20130827$203251$fil$4F15WCXLGK9vjP9XUSjP.pdf


The essential nature of Phosphorus (P) in plant growth and the finite amount of P resources have result in the question: what kind of management in farming systems can lead to P sufficiency in organic farming? The release of acid and alkaline phosphatases of plant and microbes promote the plant availability of soil P. The presented results show a significant higher enzyme activity at permanent grassland (PG) than at arable land with annual crops at an organic farm in Northern Germany. Therefore livestock systems with PG for grazing ruminants seem to have high potential to improve on-farm P-cycles via feed and manure flows even to annual cropland. These systems can profit from the nutrient transfer from PG to arable land through the use of manures. Enhance the soil-plant P cycle by better use of P sources with low availability from PG could be component of sufficiency P management in organic and also conventional production.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Agrovoc keywords:
EnglishEnzyme activityhttp://aims.fao.org/aos/agrovoc/c_2604
EnglishNutrient managementhttp://aims.fao.org/aos/agrovoc/c_330697
EnglishOrganic agriculturehttp://aims.fao.org/aos/agrovoc/c_15911
Subjects: Crop husbandry > Production systems > Pasture and forage crops
Farming Systems > Farm nutrient management
Research affiliation: International Conferences > 2013: NJF Seminar 461 - Organic farming systems as a driver for change
Deposited By: Sørensen, Peter
ID Code:24568
Deposited On:06 Nov 2013 21:47
Last Modified:06 Nov 2013 21:47
Document Language:English
Refereed:Peer-reviewed and accepted

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