Thesis
Effects of biodynamic preparations on soil, winegrape, and compost quality on a California vineyard
Washington State University
Master of Science (MS), Washington State University
2003
Handle:
https://hdl.handle.net/2376/145
Abstract
Biodynamic preparations were investigated for their effects in soil quality, winegrape quality and the quality of grape pomace and manure compost in a seven year study (1996 to 2003) on a California vineyard. The biodynamic field sprays (500, 501 and barrel compost) were not shown to have any effect on soil quality. Analyses of the winegrapes showed the biodynamic treatment to have significantly higher tannins in 2002 and Brix in 2003. In addition, biodynamic wine grapes contained notably higher tannins, total phenols and total anthocyanins in 2003. When earthworms were presented with biodynamically sprayed or unsprayed soil, significantly more worms migrated to the biodynamically sprayed soil. Grape pomace and manure compost treated with biodynamic preparations 502 through 507 showed increased ammonium concentration, higher dehydrogenase activity and increased growth response of wheat seedlings in 2002. Compost in 2003 developed a high pH, lost substantial N, and supported less aerobic microbial activity. The biodynamic preparations were not shown to have an effect during these adverse composting conditions.
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Details
- Title
- Effects of biodynamic preparations on soil, winegrape, and compost quality on a California vineyard
- Creators
- Jennifer Rose Reeve
- Contributors
- John P. Reganold (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Crop and Soil Sciences, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; Pullman, Wash. :
- Identifiers
- 99900525089601842
- Language
- English
- Resource Type
- Thesis