Pleijel H, Skärby L, Wallin G, Selldén G
Swedish Environmental Research Institute (IVL), Box 47086, S-402 58 Gothenberg, Sweden.
Environ Pollut. 1991;69(2-3):151-68. doi: 10.1016/0269-7491(91)90140-r.
Spring wheat (Triticum aestivum L., cv. Drabant) was exposed to different concentrations of ozone in open-top chambers for two growing seasons, 1987 and 1988, at a site located in south-west Sweden. The chambers were placed in a field of commercially grown spring wheat. The treatments were charcoal-filtered air (CF), non-filtered air (NF) and non-filtered air plus extra ozone (NF(+)). In 1988, one additional ozone concentration (NF(++)) was used. Grain yield was affected by the ozone concentration of the air. Air filtration resulted in an increase in grain yield of about 7% in both years, compared to NF. The addition of ozone (NF(+), NF(++)) reduced grain yield and increased the content of crude protein of the grain in both years. Filtration of the air had no significant effect on the content of crude protein, compared to NF. The results showed a strong positive chamber effect on grain yield in the cold and wet summer of 1987. In 1988, there was no net chamber effect on grain yield. The relative differences between the CF, NF and NF(+) treatments with respect to grain yield were of the same magnitude in the two years, despite the very different weather conditions.
1987年和1988年两个生长季期间，在瑞典西南部一处地点，将春小麦（普通小麦，品种Drabant）置于开顶式气室中，暴露于不同浓度的臭氧环境下。气室放置在商业化种植春小麦的田地里。处理方式包括经活性炭过滤的空气（CF）、未过滤的空气（NF）以及未过滤空气加额外臭氧（NF(+)）。1988年，增加了一种臭氧浓度处理（NF(++)）。谷物产量受空气中臭氧浓度的影响。与NF相比，空气过滤在两年中均使谷物产量提高了约7%。添加臭氧（NF(+)、NF(++)）在两年中均降低了谷物产量并增加了谷物中的粗蛋白含量。与NF相比，空气过滤对粗蛋白含量没有显著影响。结果表明，在1987年寒冷潮湿的夏季，气室对谷物产量有很强的正向影响。1988年，气室对谷物产量没有净影响。尽管天气条件差异很大，但CF、NF和NF(+)处理在谷物产量方面的相对差异在两年中幅度相同。
