Effects of atmosphere CO[sub 2] enrichment on regrowth of sour orange trees (Citrus aurantium; rutaceae) after coppicing

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · American Journal of Botany; (United States)

DOI:https://doi.org/10.2307/2445765· OSTI ID:6694629

Idso, S B; Kimball, B A ^[1]

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1. Water Conservation Lab., Phoenix, AZ (United States)

Sixteen sour orange tree (Citrus aurantium L.) seedlings were grown out-of-doors at Phoenix, Arizona, in eight clear-plastic-wall open-top enclosures maintained at four different atmospheric CO[sub 2] concentrations for a period of 2 years. Over the last year of this period, the trees were coppiced five times. The amount of dry matter harvested at each of these cuttings was a linear function of the atmospheric CO[sub 2] concentration to which the trees were exposed. For a 75% increase in atmospheric CO[sub 2] from 400 to 700 microliter per liter ([mu]L liter[sup [minus]1]), total aboveground biomass rose, in the mean, by a factor of 3.19; while for a 400 to 800 [mu]L liter[sup [minus]1] doubling of the air's CO[sub 2] content, it rose by a factor of 3.92. The relative summer (mean air temperature of 32.8 C) response to CO[sub 2] was about 20% greater than the relative winter (mean air temperature of 16.4 C) response. 27 refs., 2 figs., 1 tab.

• DOE Contract Number: AI05-88ER69014
• OSTI ID: 6694629
• Journal Information: American Journal of Botany; (United States), Vol. 81:7; ISSN 0002-9122
• Country of Publication: United States
• Language: English

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