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The effect of diversity and spatial arrangement on biomass of agricultural cultivars and native plant species

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dc.contributor.advisor Mundt, Christopher C.
dc.creator Worster, Catherine Anne
dc.date.accessioned 2011-08-08T21:07:34Z
dc.date.available 2011-08-08T21:07:34Z
dc.date.copyright 2003-05-30
dc.date.issued 2003-05-30
dc.identifier.uri http://hdl.handle.net/1957/22458
dc.description Graduation date: 2004 en_US
dc.description.abstract Species and cultivar combinations have been relatively well studied, though little is known about the influence of spatial arrangement on agricultural or native plant mixtures. The effect of spatial pattern on mixtures was explored in three experiments. In the first two, agricultural and native plants were planted in two-way mixtures that included combinations of cultivars, species, genera, or functional groups. Each combination was arranged as a random mixture within rows, alternating rows of different genotypes or species, and as alternating pairs of rows. Biomass was determined for each mixture component and compared to monoculture controls. In the third experiment, two wheat cultivars were planted in seven treatments in the 2000-2001 winter wheat season and three cultivars were planted in 18 treatments in the 2001-2002 season. One cultivar was always planted at full rate, and a second cultivar was added at 1/4 rate, either randomly mixed, or between rows of the other cultivar. Performance was measured in terms of seed yield. The specific species or cultivar combination had the most consistent influence on aboveground biomass or seed yield, while the effect of spatial arrangement was significant in few treatments. en_US
dc.language.iso en_US en_US
dc.subject.lcsh Companion planting en_US
dc.subject.lcsh Crop yields en_US
dc.subject.lcsh Plant varieties en_US
dc.subject.lcsh Wheat -- Yields en_US
dc.title The effect of diversity and spatial arrangement on biomass of agricultural cultivars and native plant species en_US
dc.type Thesis/Dissertation en_US
dc.degree.name Master of Science (M.S.) in Environmental Sciences en_US
dc.degree.level Master's en_US
dc.degree.discipline Interdisciplinary Studies en_US
dc.degree.grantor Oregon State University en_US
dc.description.digitization File scanned at 300 ppi (Monochrome, 8-bit Grayscale) using ScandAll PRO 1.8.1 on a Fi-6670 in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. en_US
dc.description.peerreview no en_us


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