Developmental and Structural Section
Mikesell, Jan .
Growth enhancement of rye intercropped with legumes.
MAIN goals of this project were to: 1) determine if growth enhancement of cereal grains occurred when maintained in close proximity to legumes, and 2) if growth promotion did occur, to what degree was the increase. Plots of rye (Lolium perenne) and mung bean (Phaseolus aureus) were grown in pure or mixed stands. Intercropped plants had a constant number of rye plants, with either: 1) 20% of the total plant number per plot comprised of bean, or 2) 5% of the total number consisting of bean plants. Measured growth parameters for rye included: 1) above ground biomass, 2) leaf number per vegetative plant, 3) height of all rye plants, 4) leaf number of all rye plants, 5) above ground mass of flowering plants, 6) panicle mass, 7) panicle length, 8) % of flowering rye plants, and 9) height of flowering rye. Additionally, 2 parameters were measured for bean: 1) above ground biomass and 2) height. Rye in intercropped plots revealed significantly greater values for all measured parameters, exhibiting a progressive decrease from plots with 20% bean, 5% bean, and pure rye stands. Comparing intercropped rye with rye in pure stands showed greater multiples for reproductive than vegetative features; e.g. a multiple represents how many times larger intercropped rye values were compared to rye in pure stands. Vegetative rye plants in mixed stands, as compared to rye in pure stands manifested average multiples of 1.77 and 1.51 for rye in plots with 20% and 5% bean plants, respectively. Reproductive rye plants in mixed stands exhibited an average multiple for plots with 20% and 5% bean, respectively, of 3.76% and 2.25%. The 2 parameters measured for bean showed mixed results; i.e. above ground biomass for plots with 20% and 5% beans were different, while height was similar.
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1 - Gettysburg College, Department of Biology, Box 392, Gettysburg, Pennsylvania, 17325, USA
Presentation Type: Oral Paper:Papers for Sections
Location: 303/Bell Memorial Union
Date: Wednesday, August 2nd, 2006
Time: 9:00 AM