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dc.contributor.advisorShirtliffe, Steven J.en_US
dc.creatorSpies, Joshua Michaelen_US
dc.date.accessioned2008-04-08T14:58:28Zen_US
dc.date.accessioned2013-01-04T04:28:26Z
dc.date.available2009-04-09T08:00:00Zen_US
dc.date.available2013-01-04T04:28:26Z
dc.date.created2008en_US
dc.date.issued2008en_US
dc.date.submitted2008en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-04082008-145828en_US
dc.description.abstractField pea is an important crop in western Canada. The current recommended seeding rate in field pea is 88 plants m-2. As certain pea genotypes have the ability for increased branching, it may be possible for a producer to seed at a lower plant population without reduced yield or to choose a highly branched cultivar to have reduced risk of yield loss under conditions of poor emergence. The objective of this research was to determine how differences in branching among seven representative pea cultivars affected crop yield at different seeding rates, and to determine if branching affected the competitive ability of pea cultivars. In the plant population experiment, seven pea cultivars were seeded at five target plant populations (10, 30, 90, 120, and 150 plant m-2) during 2005 and 2006 at Rosthern and Saskatoon, Saskatchewan. The competition experiment involved eight cultivars being seeded at 50 plants m-2 to measure competitiveness with weeds. Plant emergence, number of branches, light interception, harvest index and grain yield were measured. Growth, seasonal temperature and rainfall were near normal in 2005. Severe terminal drought occurred in 2006 which may have lead to decreased yields. Branching was greatest at low plant densities and decreased as plant density increased. Grain yield increased as plant density increased until it plateaued at 80 – 100 plants m-2. The response of yield to plant density differed to some extent among cultivars, with CDC Acer and CDC Bronco achieving more of their potential yield at lower densities, while Carrera and Courier required higher densities to reach the same proportion of potential yield. Weed biomass was lowest in plots sown to longer vined cultivars with normal leaf type. Branching habit did not affect the competitiveness of pea cultivars. Potential exists to plant highly branched cultivars to reduce risk of yield loss in situations where low plant emergence might occur.en_US
dc.language.isoen_USen_US
dc.subjectCultivaren_US
dc.subjectYield lossen_US
dc.subjectWeed biomassen_US
dc.subjectYield-density relationshipen_US
dc.subjectSeeding rateen_US
dc.subjectCompetitivenessen_US
dc.subjectOptimal plant densityen_US
dc.subjectBranchingen_US
dc.titleThe effect of field pea (Pisum sativum L.) basal branching on optimal plant density and crop competitivenessen_US
thesis.degree.departmentPlant Sciencesen_US
thesis.degree.disciplinePlant Sciencesen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science (M.Sc.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberMiller, Perryen_US
dc.contributor.committeeMemberGan, Yantaien_US
dc.contributor.committeeMemberCoulman, Bruce E.en_US
dc.contributor.committeeMemberBueckert, Rosalind A.en_US
dc.contributor.committeeMemberWarkentin, Tom D.en_US


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