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Nitrogen supply affects root:shoot ratio in corn and velvetleaf (Abutilon theophrasti)

Published online by Cambridge University Press:  20 January 2017

Kimberly D. Bonifas ,
Daniel T. Walters ,
Kenneth G. Cassman  and
John L. Lindquist
Kimberly D. Bonifas
Affiliation:
Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE 68583-0915
Daniel T. Walters
Affiliation:
Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE 68583-0915
Kenneth G. Cassman
Affiliation:
Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE 68583-0915
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Abstract

Competitive outcome between crops and weeds is affected by partitioning of new biomass to above- and belowground plant organs in response to nutrient supply. This study determined the fraction of biomass partitioned to roots vs. shoots in corn and velvetleaf in response to nitrogen (N) supply. Pots measuring 28 cm in diam and 60 cm deep were embedded in the ground and each contained one plant of either corn or velvetleaf. Each plant received one of three N treatments: 0, 1, or 3 g N applied as ammonium nitrate in 2001, and 0, 2, or 6 g N in 2002. Measurements of total above- and belowground biomass were made at 10 sampling dates during each growing season. The root:shoot ratio decreased over time for both corn and velvetleaf as a result of normal plant growth and as N supply increased. Root:shoot ratio was greater for corn than for velvetleaf at comparable stages of development and at all levels of N supply. Both corn and velvetleaf display true plasticity in biomass partitioning patterns in response to N supply. Velvetleaf root:shoot ratio increased by 46 to 82% when N was limiting in 2001 and 2002, respectively, whereas corn root:shoot ratio increased by only 29 to 45%. The greater increase in biomass partitioned to roots by velvetleaf might negatively impact its ability to compete with corn for light when N supply is limited.

Keywords

Velvetleaf, Abutilon theophrasti Medic., ABUTHcorn, Zea mays L.Biomass partitioningontogenetic driftoptimal partitioning theoryphenology
Type
Weed Biology and Ecology
Information
Weed Science , Volume 53 , Issue 5 , October 2005 , pp. 670 - 675
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

Bazzaz, F. A., Garbutt, K., Reekie, E. G., and Williams, W. E. 1989. Using growth analysis to interpret competition between a C3 and C4 annual under ambient and elevated CO2 . Oecologia 79:223–235.Google Scholar
Brown, R. H. 1978. A difference in N use efficiency in C3 and C4 plants and its implications in adaptation and evolution. Crop Sci 18:93–98.Google Scholar
Brown, R. H. 1985. Growth of C3 and C4 grasses under low N levels. Crop Sci 25:954–957.Google Scholar
Coleman, J. S., McConnaughay, K. D. M., and Ackerly, D. D. 1994. Interpreting phenotypic variation in plants. Trends Ecol. Evol 9:187–191.Google Scholar
Evans, G. C. 1972. The Quantitative Analysis of Plant Growth. Berkeley, CA: University of California Press. 734 p.Google Scholar
Gedroc, J. J., McConnaughay, K. D. M., and Coleman, J. S. 1996. Plasticity in root/shoot partitioning: optimal, ontogenetic, or both? Funct. Ecol 10:44–50.Google Scholar
Harmens, H., Farrar, J. F., Marshall, C., and Stirling, C. M. 2000. Is partitioning of dry weight and leaf area within Dactylis glomerata affected by N and CO2 enrichment? Ann. Bot 86:833–839.Google Scholar
Hilbert, D. W. 1990. Optimization of plant root:shoot ratios and internal nitrogen concentration. Ann. Bot 66:91–99.Google Scholar
Liebman, M., Mohler, C. L., and Staver, C. P. 2001. Ecological management of agricultural weeds. Cambridge, Great: Britain: Cambridge University Press. 532 p.Google Scholar
Lindquist, J. L. and Mortensen, D. A. 1999. Ecophysiological characteristics of four corn hybrids and Abutilon theophrasti . Weed Res 39:271–285.Google Scholar
Lindquist, J. L., Mortensen, D. A., Clay, A., Schmenk, R., Kells, J. J., Howatt, K., and Westra, P. 1996. Stability of corn (Zea mays)-velvetleaf (Abutilon theophrasti) interference relationships. Weed Sci 44:309–313.Google Scholar
Littell, R. C., Milliken, G. A., Stroup, W. W., and Wolfinger, R. D. 1996. SAS® System for mixed models. Cary, NC: SAS Institute.Google Scholar
McConnaughay, K. D. M. and Coleman, J. S. 1999. Biomass allocation in plants: ontogeny or optimality? A test along three resource gradients. Ecology 80:2581–2593.Google Scholar
Mooney, H. A., Bloom, A. J., and Chapin, F. S. III. 1985. Resource limitation in plants—an economic analogy. Ann. Rev. Ecol. Syst 16:363–92.Google Scholar
Murphy, C. and Lindquist, J. L. 2002. Growth response of velvetleaf to three post emergence herbicides. Weed Sci 50:364–369.Google Scholar
Reynolds, H. L. and D'Antonio, C. 1996. The ecological significance of plasticity in root weight ratio in response to nitrogen: opinion. Plant Soil 185:75–97.CrossRefGoogle Scholar
Robinson, D. 1986. Compensatory changes in the partitioning of dry matter in relation to nitrogen uptake and optimal variations of growth. Ann. Bot 58:841–848.Google Scholar
Roeth, F. W. 1987. Velvetleaf-coming on strong. Crops Soil Mag 39:10–11.Google Scholar
Sage, R. F. and Pearcy, R. W. 1987. The nitrogen use efficiency of C3 and C4 plants. Plant Physiol 84:954–958.Google Scholar
Spencer, N. R. 1984. Velvetleaf, Abutilon theophrasti, history and economic impact in the United States. Econ. Bot 38/4:407–416.Google Scholar
USDA. 2005. National Agricultural Statistics Service. (NASS) Agricultural Statistics 2005. http://www.usda.gov/nass/pubs/agr05/acro05.htm.Google Scholar