Record Display for the EPA National Library Catalog


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
Library Call Number Additional Info Location Last
NTIS  PB90-216375 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 11p
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.