| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
USDA-ARS Air Quality-Plant Growth and Development Research Unit, 3908 Inwood Rd., Raleigh, NC 27603 and Dep. of Plant Pathology, North Carolina State Univ.;
USDA-ARS Air Quality-Plant Growth and Development Research Unit, 3908 Inwood Rd., Raleigh, NC 27603, and Dep. of Crop Science, North Carolina State Univ.;
Dep. of Statistics, North Carolina State Univ.
* Corresponding author (asheagle{at}unity.ncsu.edu).
ABSTRACT
Little is known about effects of daily CO2 enrichment duration and root environment on plant response to elevated CO2. Two experiments were performed with Essex soybean (Glycine max L. Merr.) in open-top field chambers to address these questions. In one experiment, effects of 12 and 24 h d–1 exposures to double-ambient CO2 were compared for plants grown in 14 L pots that were either insulated to moderate soil temperature or not insulated. Although never significant statistically, trends at some growth stages suggested that nighttime CO2 enrichment contributed to growth and yield. Plants grew and yielded more in insulated than noninsulated pots, but there were no significant CO2 enrichment x insulation interactions. In the second experiment, response to approximately 1.3, 1.6, and 1.9 times ambient CO2 was compared for plants grown in the ground or 14 L pots. Enhancement of photosynthesis, growth, and yield by CO2 enrichment was similar in pots and in the ground. Linear responses to different CO2 concentrations were significant for all yield components in both root environments, whereas quadratic responses were significant for plants in pots but not for plants in the ground. Tests of proportionality of response for yield components showed no evidence of significant differences between plants in pots and in the ground except weight per 100 seeds. Seed yield enhancement at 1.9 times ambient CO2 was 36% for plants in pots and 33% for plants in the ground. Overall, proportional response of soybean to CO2 enrichment was relatively uniform in spite of large differences in baseline growth and yield.
Cooperative investigations of the USDA-ARS Air Quality Research Unit and the North Carolina State University. Funded in part by the North Carolina Agricultural Research Service.
Received for publication March 9, 1998.
This article has been cited by other articles:
|
|
 |
|
  E. L. Fiscus, F. L. Booker, J.-J. B. Dubois, T. W. Rufty, J. W. Burton, and W. A. Pursley Carbon Dioxide Enhancement Effects in Container- versus Ground-Grown Soybean at Equal Planting Densities Crop Sci., November 7, 2007; 47(6): 2486 - 2494. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
F. L. Booker, J. E. Miller, E. L. Fiscus, W. A. Pursley, and L. A. Stefanski Comparative Responses of Container- versus Ground-Grown Soybean to Elevated Carbon Dioxide and Ozone Crop Sci., March 28, 2005; 45(3): 883 - 895. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. S. Heagle, J. E. Miller, and W. A. Pursley Growth and Yield Responses of Potato to Mixtures of Carbon Dioxide and Ozone J. Environ. Qual., September 1, 2003; 32(5): 1603 - 1610. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. S. Heagle, J. E. Miller, K. O. Burkey, G. Eason, and W. A. Pursley Growth and Yield Responses of Snap Bean to Mixtures of Carbon Dioxide and Ozone J. Environ. Qual., November 1, 2002; 31(6): 2008 - 2014. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A.S. Heagle, J.E. Miller, and W.A. Pursley Growth and Yield Responses of Winter Wheat to Mixtures of Ozone and Carbon Dioxide Crop Sci., November 1, 2000; 40(6): 1656 - 1664. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Crop Science | |||
| Journal of Natural Resources and Life Sciences Education |
Vadose Zone Journal | ||||
| Soil Science Society of America Journal | Journal of Plant Registrations | The Plant Genome | |||
