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The effects of weather, seed rate and cultivar on lodging and yield in winter wheat

Published online by Cambridge University Press:  27 March 2009

D. L. Easson ,
E. M. White  and
S. J. Pickles
D. L. Easson
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, UK The Queen's University of Belfast, Belfast BT7 INN, UK
E. M. White
Affiliation:
Agricultural Botany Research Division, The Department of Agriculture for Northern Ireland, Plant Testing Station, Crossnacreevy, Belfast BT6 9SH, UK The Queen's University of Belfast, Belfast BT7 INN, UK
S. J. Pickles
Affiliation:
The Queen's University of Belfast, Belfast BT7 INN, UK
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Summary

Winter wheat cultivars Apollo, Hornet, Longbow and Norman were each sown at 50, 100, 200, 400, 800 and 1600 seeds/m2 in a field experiment conducted in Northern Ireland over the 1989/90 crop year. No growth regulators were applied and the wheat received 178 kgN/ha top-dressing in the spring. Hourly rainfall, windspeed and wind direction data were recorded and lodging was visually assessed from the end of May to harvest. Lodging first occurred in the 1600 seed-rate plots as the ears were emerging in early June and then progressively increased in the 800, 400 and 200 plots during June, July and August. Lodging did not occur suddenly but took several hours, with the stems first lying at an angle before lodging completely. Stem buckling or breakage did not appear to be the principal form of structural failure. The longest strawed cultivar, Longbow, lodged most severely. The shorter-strawed Norman also lodged badly in contrast with Hornet which had a similar straw length. Apollo, which was taller than Norman and Hornet and produced more ears per square metre than the other cultivars, lodged least but tended to lean at c. 30° from the vertical. Lodging occurred during or within 24 h of periods of rainfall which, in many cases, coincided with windspeeds at crop height averaging > 25 km/h and occasionally > 50 km/h. Lodging also occurred following rainfall when the windspeed did not exceed 16 km/h. The grain yield was negatively correlated with the average lodging from ear emergence to harvest, there being a 1 t/ha decline in yield for each 10% increase in average area lodged. The 50 and 100 seed-rate plots yielded 10 t/ha and had little or no lodging. The decline in yield with increased lodging and seed rate was attributed to the effect of lodging rather than to seed rate and was associated with a fall in the number of grains/ear and 1000-grain weight from 56 and 53·5 g at the lowest seed rate to 15 and 42·7 g at the highest, respectively. A comparison of the plants from lodged and unlodged plots of the 1600 and 800 seed rates, and subsequently of the 800 and 400 seed rates, indicated that at the higher seed rate, lodged plots had less fresh weight per unit area, basal internodes with smaller diameters, fewer support roots per stem, and a lower root dry weight per stem.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 121 , Issue 2 , October 1993 , pp. 145 - 156
Copyright
Copyright © Cambridge University Press 1993

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References

REFERENCES

Bauer, F. (1964). Some recent indirect methods for determining lodging resistance in wheat. Zeitschrift für Acker- und Pflcmzenbau 119, 70–80.Google Scholar
Darwinkel, A. (1978). Patterns of tillering and grain production of winter wheat at a wide range of plant densities. Netherlands Journal of Agricultural Science 26, 383–398.CrossRefGoogle Scholar
Ennos, A. R. (1991). The mechanics of anchorage in wheat Triticum aestivum L. II. Anchorage of mature wheat against lodging. Journal of Experimental Botany 42, 1607–1613.CrossRefGoogle Scholar
Graham, J. (1985). Lodging in wheat. PhD thesis, University of Reading.Google Scholar
Jancovic, M. (1966). The effect of lodging on the yield and quality of winter wheat cv Bezostaya 1. Savremena Poljoprivreda 14, 111–116.Google Scholar
Laude, H. H. & Pauli, A. W. (1956). Influence of lodging on yield and other characters in winter wheat. Agronomy Journal 48, 452–455.CrossRefGoogle Scholar
Lockhart, J. A. R. & Wiseman, A. J. L. (1983). Introduction to Crop Husbandry. Oxford: Pergamon Press.Google Scholar
National Institute of Agricultural Botany (1989). Recommended Varieties of Cereals, 1989, Cambridge: National Institute of Agricultural Botany.Google Scholar
Neenan, M. & Spencer-Smith, J. L. (1975). An analysis of the problem of lodging with particular reference to wheat and barley. Journal of Agricultural Science, Cambridge 85, 495–507.CrossRefGoogle Scholar
Pinthus, M. J. (1973). Lodging in wheat, barley and oats: the phenomenon, its causes, and preventative measures. Advances in Agronomy 25, 209–263.CrossRefGoogle Scholar
Puckridge, D. W. & Donald, C. M. (1967). Competition among wheat plants sown at a wide range of densities. Australian Journal of Agricultural Research 18, 193–211.CrossRefGoogle Scholar
Stanca, A. M., Jenkins, G. & Hanson, P. R. (1979). Varietal responses in spring barley to natural and artificial lodging and to a growth regulator. Journal of Agricultural Science, Cambridge 93, 449–456.CrossRefGoogle Scholar
Thomas, W. D. (1982). Plant growth regulators. In Yield of Cereals Course Papers, 1982, pp. 78–95. Stoneleigh: NAC Cereal Unit, RASE.Google Scholar
Udagawa, T. & Oda, K. (1967). Influences of environmental factors on lodging of wheat and barley plants. Proceedings of the Crop Science Society of Japan 36, 192–218.CrossRefGoogle Scholar
Weibel, R. O. & Pendleton, J. W. (1964). Effect of artificial lodging on winter wheat grain yield and quality. Agronomy Journal 56, 487–488.CrossRefGoogle Scholar
Zadoks, J. C., Chang, T. T. & Konzak, C. F. (1974). A decimal code for the growth stages of cereals. Weed Research 14, 415–421.CrossRefGoogle Scholar