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Light and growth rate effects on crop and weed responses to nitrogen

  • Matthew M. Harbur and Micheal D. K. Owen (a1)

Abstract

The nitrogen (N) response of competing plants may be affected by photosynthetically active radiation (PAR) availability and maximum potential growth rate, which determine N requirements. The responses of two crop (corn and soybean) and six weed species (common lambsquarters, common waterhemp, giant foxtail, velvetleaf, wild mustard, and woolly cupgrass) in low and high (150 and 450 μmol m−2 s−1) PAR levels to daily fertilization with either low or high (0.2 or 7.5 mM) NH4NO3 levels were studied. Leaf area of all species responded positively to N by 8 d after emergence (DAE) when grown in high PAR; in low PAR, most species did not respond until 11 DAE. Dry weight and leaf area of all species at 18 DAE were greater with high than with low N. These responses to high N were also greater in high than in low PAR for all species. Dry weights with high N were up to 100% greater in low PAR and up to 700% greater in high PAR than dry weights with low N. These responses suggest that low PAR reduced the benefit of N to the plants. The regression of relative growth rate (RGR) with high N to RGR with low N had a slope that was less than unity (β = 0.79), indicating that species with a higher RGR with high N experienced greater decreases in RGR with low N. Similarly, the sensitivity (change in RGR) of plants grown with high and low N was positively related to RGR with high N. RGR differences among crop and weed species may be related to differences in N requirement that could be exploited for weed management. RGR and seed size were negatively correlated, which may explain previous observations that small-seeded weeds were more sensitive to environmental stress.

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Corresponding author

Corresponding author. Department of Agronomy, 2104 Agronomy Hall, Iowa State University, Ames, IA 50011-1010

References

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Anderson, R. L., Tanaka, D. L., Black, A. L., and Schweizer, E. E. 1998. Weed community and species response to crop rotation, tillage, and nitrogen fertility. Weed Technol 12:531536.
Andersson, T. N. and Lundegardh, B. 1999. Field horsetail (Equisetum arvense)—effects of potassium under different light and nitrogen conditions. Weed Sci 47:4754.
Bello, I. A., Owen, M. D. K., and Hatterman-Valenti, H. M. 1995. Effect of shade on velvetleaf (Abutilon theophrasti) growth, seed production, and dormancy. Weed Technol 9:452455.
Berkowitz, A. R. 1988. Competition for resources in weed-crop mixtures. Pages 89119 in Altieri, M. A. and Liebman, M. L. eds. Weed Management in Agroecosystems: Ecological Approaches. Boca Raton, FL: CRC.
Blackshaw, R. E. 1993. Safflower (Carthamus tinctorius) density and row spacing effects on competition with green foxtail (Setaria viridis). Weed Sci 41:403408.
Blackshaw, R. E., Semach, G., and Janzen, H. H. 2003. Fertilizer application method affects nitrogen uptake in weeds and wheat. Weed Sci 59:634641.
Brown, R. H. 1978. A difference in N use efficiency in C3 and C4 plants and its implications in adaptation and evolution. Crop Sci 18:9398.
Carlson, H. L. and Hill, J. E. 1986. Wild oat (Avena fatua) competition with spring wheat: effects of nitrogen fertilization. Weed Sci 34:2933.
DiTomaso, J. M. 1995. Approaches for improving crop competitiveness through the manipulation of fertilization strategies. Weed Sci 43:491497.
Evans, S. P., Knezevic, S. Z., Lindquist, J. L., Shapiro, C. A., and Blankenship, E. E. 2003. Nitrogen application influences the critical period for weed control in corn. Weed Sci 51:408417.
Fenner, M. 1983. Relationships between seed weight, ash content and seedling growth in twenty-four species of compositae. New Phytol 95:697706.
Gastal, F. and Lemaire, G. 2002. N uptake and distribution in crops: an agronomical and ecophysiological perspective. J. Exp. Bot 53:789799.
Grime, J. P. and Hunt, R. 1975. Relative growth rate: its range and adaptive significance in a local flora. J. Ecol 63:393422.
Gunsolus, J. L. and Buhler, D. D. 1999. A risk management perpective on integrated weed management. J. Crop Prod 2:167187.
Heldt, H-W. 1997. Plant Biochemistry and Molecular Biology. New York: Oxford University Press. Pp. 175191.
Hoagland, D. R. and Arnon, D. I. 1950. The water-culture method for growing plants without soil. Circ.—Calif. Univ. Agric. Exp. Sta 347:139.
Hunt, R. 1990. Basic Growth Analysis: Plant Growth Analysis for Beginners. London: Unwin Hyman. Pp. 2554.
Liebman, M. and Davis, A. S. 2000. Integration of soil, crop and weed management in low-external-input farming systems. Weed Res 40:2747.
Liebman, M. and Gallandt, E. R. 1997. Many little hammers: Ecological approaches for management of crop-weed interactions. Pages 291343 in Jackson, L. E. ed. Ecology in Agriculture. San Diego, CA: Academic.
Liebman, M. and Ohno, T. 1998. Crop rotation and legume residue effects on weed emergence and growth: applications for weed management. Pages 181221 in Hatfield, J. L., Buhler, D. D., and Stewart, B. A. eds. Integrated Weed and Soil Management. Chelsea, MI: Ann Arbor Press.
Limon-Ortega, A., Mason, S. C., and Martin, A. R. 1998. Production practices improve grain sorghum and pearl millet competitiveness with weeds. Agron. J 90:227232.
Lindquist, J. 2001. Light-saturated CO2 assimilation rates of corn and velvetleaf in response to leaf nitrogen and development stage. Weed Sci 49:706710.
Mashingaidze, A. B. 1990. Comparison of Leaf Area Expansion Rates in Four Crops and Seven Weeds under Two Temperature Regimes. . Iowa State University, Ames, IA.
Mohler, C. L. 1996. Ecological bases for the cultural control of annual weeds. J. Prod. Agric 9:468474.
Oaks, A. 1994. Efficiency of nitrogen utilization in C3 and C4 cereals. Plant Physiol 106:407414.
O'Donovan, J. T., McAndrew, D. W., and Thomas, A. G. 1997. Tillage and nitrogen influence weed population dynamics in barley (Hordeum vulgare). Weed Technol 11:502509.
Patterson, D. T. 1982. Shading responses of purple and yellow nutsedges (Cyperus rotundus and Cyperus esculentus). Weed Sci. 30:2530.
[SAS] Statistical Analysis Systems. 2001. The SAS System for Windows. Release Version 8.02. Cary, NC: Statistical Analysis Systems Institute.
Seibert, A. C. and Pearce, R. B. 1993. Growth analysis of weed and crop species with reference to seed weight. Weed Sci 41:5256.
Shipley, B. and Keddy, P. A. 1988. The relationship between relative growth rate and sensitivity to nutrient stress in twenty-eight species of emergent macrophytes. J. Ecol 76:11011110.
Shrefler, J. W., Dusky, J. A., Shilling, D. G., Brecke, B. J., and Sanchez, C. A. 1994. Effects of phosphorus fertility on competition between lettuce (Lactuca sativa) and spiny amaranth (Amaranthus spinosus). Weed Sci 42:556560.
Snedecor, G. W. and Cochran, W. G. 1989. Statistical Methods. Ames, IA: Iowa State University Press. Pp. 6482. 273–296.
Stoller, E. W. and Myers, R. A. 1989. Response of soybeans (Glycine max) and four broadleaf weeds to reduced irradiance. Weed Sci 37:570574.
Teasdale, J. R. and Frank, J. R. 1983. Effect of row spacing on weed competition with snap beans (Phaseolus vulgaris). Weed Sci 31:8185.
Tilman, D. 1990. Constraints and tradeoffs: toward a predictive theory of competition and succession. Oikos 58:315.
Troeh, F. R. and Thompson, L. M. 1993. Soils and Soil Fertility. New York: Oxford University Press. Pp. 193213.
Valenti, S. A. and Wicks, G. A. 1992. Influence of nitrogen rates and wheat (Triticum aestivum) cultivars on weed control. Weed Sci 40:115121.
Vengris, J., Colby, W. G., and Drake, M. 1955. Plant nutrient competition between weeds and corn. Agron. J 47:213216.
Wyse, D. L. 1992. Future of weed science research. Weed Technol 6:162165.

Keywords

Light and growth rate effects on crop and weed responses to nitrogen

  • Matthew M. Harbur and Micheal D. K. Owen (a1)

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