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RECORD NUMBER: 36 OF 152

OLS Field Name OLS Field Data
Main Title Effects of Long-Term Ozone Exposure and Soil Moisture Deficit on Growth of a Ladino Clover-Tall Fescue Pasture.
Author Heagle, A. S. ; Rebbeck, J. ; Shafer, S. R. ; Blum, U. ; Heck, W. W. ;
CORP Author Corvallis Environmental Research Lab., OR. ;North Carolina State Univ. at Raleigh.;Department of Agriculture, Washington, DC.
Publisher c1988
Year Published 1988
Report Number EPA/600/J-88/512;
Stock Number PB90-216375
Additional Subjects Ozone ; Soil water ; Plant growth ; Forage grasses ; Acclimatization ; Yield ; Field tests ; Seasonal variations ; Tolerances(Physiology) ; Exposure ; Irrigation ; Assessments ; Reprints ; Trifolium repens ; Festuca arundinacea
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-216375 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/27/1990
Collation 11p
Abstract
Most field studies relating seasonal ozone (O3) exposure to crop yield have been performed in the absence of plant moisture stress. The authors examined the response of a mixture of ladino clover and tall fescue to chronic doses of O3 at two soil-moisture levels over two growing seasons. The soil-moisture treatments, obtained by differential irrigation, were well-watered or water-stressed. A soil-moisture deficit occurred intermittently in water-stressed plots during both seasons. Shoots were harvested when plants reached a height of 20-25 cm. Total forage yield in the water stressed plots was 12-14% less than that in the well-watered plots. Clover was much more sensitive than fescue to O3. The decrease in total forage yield and decreased quality caused by decreased growth of clover suggest a need for ladino clover lines that are tolerant to O3.