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OLS Field Name OLS Field Data
Main Title Competition, Morphology and Canopy Structure in Wheat ('Triticum aestivum L.') and Wild Oat ('Avena fatua L.') Exposed to Enhanced Ultraviolet-B Radiation.
Author Barnes, P. W. ; Jordan, P. W. ; Gold, W. G. ; Flint, S. D. ; Caldwell, M. M. ;
CORP Author Utah State Univ., Logan. Dept. of Range Science and Ecology Center.;Corvallis Environmental Research Lab., OR.
Publisher c1988
Year Published 1988
Report Number EPA/600/J-88/416;
Stock Number PB90-108317
Additional Subjects Plant anatomy ; Farm crops ; Crop weeds ; Ultraviolet radiation ; Competition ; Field tests ; Greenhouses ; Biomass ; Oat plants ; Wheat plants ; Reprints ; Triticum aestivum ; Avena fatua ; Biological radiation effects
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NTIS  PB90-108317 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/10/1990
Collation 14p
Abstract The influence of enhanced ultraviolet-B radiation (UV-B, 280-320nm) on competitive balance in wheat (Triticum aestivum L.) and wild oat (Avena fatua L.) was examined in the field for each of 6 years using replacement series experiments. The relative competitive status of wheat increased significantly under UV-B enhancement in two of the years, when precipitation was relatively high, and over all years when data from all years were combined. Shifts in competitive balance occurred in response to UV-B enhancement despite no significant changes in total shoot biomass in either monocultures or mixtures. Associated with shifts in competitive balance under UV-B treatment in the field and in a glasshouse competition experiment were similar, differential effects of UV-B on species growth form: leaf insertion heights and leaf blade lengths were reduced to a greater extent in wild oat than in wheat in mixtures exposed to enhanced UV-B. These changes in individual plant morphology were related to shifts in foliage height distribution in mixed canopies with wheat overtopping wild oat to a greater degree under UV-B treatment.
Supplementary Notes Pub. in Functional Ecology 2, p319-330 1988. Sponsored by Corvallis Environmental Research Lab., OR.
NTIS Title Notes Journal article.
Title Annotations Reprint: Competition, Morphology and Canopy Structure in Wheat ('Triticum aestivum L.') and Wild Oat ('Avena fatua L.') Exposed to Enhanced Ultraviolet-B Radiation.
Category Codes 98D; 57C
NTIS Prices PC A03/MF A01
Primary Description 600/02
Document Type NT
Cataloging Source NTIS/MT
Control Number 932620987
Origin NTIS
Type CAT