Selenium uptake and it's effect on growth of carrots, squash, and sudan grass
KeywordsBiology, Plant Physiology.
AdvisorGlenn, Edward P.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractA greenhouse pot experiment was conducted to study the amount of selenium accumulation and the effect of selenite on growth of carrots, squash, and sudan grass. Selenium was added to sandy soil as sodium selenite at five rates (0.02, 0.08, 0.32, 1.28, and 5 mgn) in a randomized complete block design including a control, in three replicates. Addition of 5 mg/l selenium reduced the total biomass (in carrots and squash) as much as 97% and as much as 85% in sudan grass. Crops in the control treatment and those exposed to 0.02 mg/l did not accumulate selenium to levels considered toxic to animals and humans. All other treatments resulted in levels of accumulation that could pose hazards when consumed by animals and humans. Based on the interpolated irrigation concentration that caused 50% yield reduction (observed data), sudan grass was the most tolerant crop (4.0 mg/l)while squash plants were the least tolerant (0.9 mg/l) and carrots were intermediate (2.2 mg/l).
Degree ProgramGraduate College
Soil, Water and Environmental Science