Air pollution and its impacts on wheat yield in the Pakistan Punjab.

A study using open-top chambers ventilated with ambient or charcoal-filtered air in the vicinity of Lahore, Pakistan, has demonstrated a reduction of 46.7% and 34.8% in the grain yield for two cultivars of winter wheat (Triticum aestivum L.). The 6-h daily mean O(3) concentrations were 25-45 nl litre(-1) and on the basis of experience in North America and Europe, reductions in yield in the present study are substantially greater than might be predicted. The reasons for this discrepancy are discussed, together with implications for the suitability of a simple, relatively cheap, open-top chamber system for developing-country studies on the effects of air pollution on crops.

[1]  R. Amundson,et al.  Effects of ozone and sulfur dioxide on yield of winter wheat , 1987 .

[2]  H. Weigel,et al.  Response of nitrogen metabolism in beans (Phaseolus vulgaris L.) after exposure to ozone and nitrogen dioxide, alone and in sequence. , 1991, The New phytologist.

[3]  O. Bambawale.  Evidence of ozone injury to a crop plant in India , 1986 .

[4]  David T. Mage,et al.  Urban air pollution in megacities of the world , 1996 .

[5]  J. Fuhrer,et al.  The response of spring wheat (Triticum aestivum L.) to ozone at higher elevations , 1992 .

[6]  B. E. Saltzman,et al.  Iodometric Microdetermination of Organic Oxidants and Ozone. Resolution of Mixtures by Kinetic Colorimetry , 1959 .

[7]  H. Weigel,et al.  Single and interactive effects of low levels of O3, SO2 and NO2 on the growth and yield of spring rape. , 1991, Environmental pollution.

[8]  L. Skärby,et al.  Yield and grain quality of spring wheat (Triticum aestivum L., cv. Drabant) exposed to different concentrations of ozone in open-top chambers. , 1991, Environmental pollution.

[9]  O. C. Taylor,et al.  Assessment of Crop Loss From Air Pollutants , 1988, Springer Netherlands.

[10]  H. Weigel,et al.  Concurrent exposure to SO2 and/or NO2 alters growth and yield responses of wheat and barley to low concentrations of O3 , 1991 .

[11]  K. Vandermeiren,et al.  Effects of air filtration on spring wheat grown in open-top field chambers at a rural site. I. Effects on growth, yield and dry matter partitioning. , 1992, Environmental pollution.

[12]  A. Heagle,et al.  Yield response of winter wheat to chronic doses of ozone , 1979 .

[13]  J. Fuhrer,et al.  Effects of ozone on the yield of spring wheat (Triticum aestivum L., cv. Albis) grown in open-top field chambers. , 1989, Environmental pollution.

[14]  P. S. Baenziger,et al.  Yield and grain quality responses of soft red winter wheat exposed to ozone during anthesis , 1986 .

[15]  B. E. Saltzman,et al.  IODOMETRIC MICRODETERMINATION OF ORGANIC OXIDANTS AND OZONE , 1959 .