HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Hardman, L. L. Articles by Brun, W. A. Search for Related Content PubMed Articles by Hardman, L. L. Articles by Brun, W. A. Agricola Articles by Hardman, L. L. Articles by Brun, W. A.

Effect of Atmospheric Carbon Dioxide Enrichment at Different Developmental Stages on Growth and Yield Components of Soybeans¹

Vegetative and reproductive parameters were measured at maturity on field-grown soybean plants [Glycine max (L.) Merr., var. Hark] given CO₂ enrichment to 1,200 (±150) ppm for 5-week periods corresponding to vegetative, flowering, and pod-filling stages of development. CO₂ enrichment during the vegetative stage had no effects on the measured parameters at maturity. CO₂ enrichment during flowering caused increased node numbers, leaf and stem dry weights, and pod numbers. Seed size decreased and need yield was not affected.

CO₂ enrichment during pod filling had no effects on vegetative parameters, but caused a slight increase in pod number, and a marked increase in pod weight and seed yield at maturity. These results are discussed in terms of source-sink relationships and the limitations imposed by the availability of photosynthate.

Key Words: Glycine max (L.) Merr. • Source-sink relationships

² Assistant Professor, Department of Biology, Ball State University, Muncie, Ind. 47306, and Associate Professor of Agronomy, Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minn. 55101, respectively.

Received for publication May 1, 1971.

This article has been cited by other articles:

				S. Kumudini, J. Omielan, and D. J. Hume Soybean Genetic Improvement in Yield and the Effect of Late-Season Shading and Nitrogen Source and Supply Agron. J., February 29, 2008; 100(2): 400 - 405. [Abstract] [Full Text] [PDF]

				A. G. Kantolic and G. A. Slafer Development and Seed Number in Indeterminate Soybean as Affected by Timing and Duration of Exposure to Long Photoperiods after Flowering Ann. Bot., May 1, 2007; 99(5): 925 - 933. [Abstract] [Full Text] [PDF]

				D. B. Egli and W. P. Bruening Shade and Temporal Distribution of Pod Production and Pod Set in Soybean Crop Sci., August 1, 2005; 45(5): 1764 - 1769. [Abstract] [Full Text] [PDF]

				S. Kumudini, L. J. Grabau, T. W. Pfeiffer, and C. C. Steele Management and Production Potential of Value-Added Soybean Cultivars in South Central USA Agron. J., May 13, 2005; 97(3): 904 - 909. [Abstract] [Full Text] [PDF]

				D. B. Egli and W. P. Bruening Synchronous Flowering and Fruit Set at Phloem-Isolated Nodes in Soybean Crop Sci., September 1, 2002; 42(5): 1535 - 1540. [Abstract] [Full Text] [PDF]

				S. Kumudini, D. J. Hume, and G. Chu Genetic Improvement in Short Season Soybeans: I. Dry Matter Accumulation, Partitioning, and Leaf Area Duration Crop Sci., March 1, 2001; 41(2): 391 - 398. [Abstract] [Full Text] [PDF]

				J. P. Mathew, S. J. Herbert, S. Zhang, A. A.F. Rautenkranz, and G. V. Litchfield Differential Response of Soybean Yield Components to the Timing of Light Enrichment Agron. J., November 1, 2000; 92(6): 1156 - 1161. [Abstract] [Full Text]

				D.B. Egli Variation in Leaf Starch and Sink Limitations during Seed Filling in Soybean Crop Sci., September 1, 1999; 39(5): 1361 - 1368. [Abstract] [Full Text]