Effects of ozone and water stress on canopy temperature, water use, and water-use efficiency of alfalfa

Technical Report · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6654832

Temple, P J; Benoit, L F

Ozone (O/sub 3/) and soil water deficit are two environmental stresses that significantly affect the growth and yield of alfalfa. However, little is known of the responses of field-grown alfalfa to O/sub 3/, and the effects of the interaction between O/sub 3/ and water stress on canopy temperature and water relations of alfalfa have not been previously reported. Water use, rate of soil-water depletion, or depth of effective rooting zone were not affected by O/sub 3/, whereas water stress significantly reduced all three. Water-use efficiency was significantly reduced by O/sub 3/. The effects of O/sub 3/ on WUE were attributed to premature senescence and abscission of older alfalfa leaves.

• Research Organization: California Univ., Riverside (USA). Statewide Air Pollution Research Center
• OSTI ID: 6654832
• Report Number(s): PB-88-251756/XAB
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
550200 -- Biochemistry
59 BASIC BIOLOGICAL SCIENCES
ALFALFA
BACTERIA
BIOLOGICAL EFFECTS
DROUGHTS
ENVIRONMENTAL IMPACTS
FIELD TESTS
GROWTH
IRRIGATION
LEGUMINOSAE
MICROORGANISMS
OZONE
PLANT GROWTH
PLANTS
RHIZOBIUM
TESTING