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利用中国稻/麦轮作系统O3-FACE(Ozone-Free Air Concentration Enrichment)试验平台,研究了大气O3浓度升高(比周围大气高50%)对稻季不同生育期耕层土壤溶液中Ca、Mg浓度的影响。结果表明,大气O3浓度升高对稻田0~15 cm耕层土壤溶液Ca浓度无明显影响,但Mg浓度呈现降低趋势;降低了15 cm处土壤溶液Ca、Mg浓度,其中对Mg浓度的降低幅度为20.97%,且达显著水平;大气O3浓度升高可改变耕层土壤溶液中Ca、Mg离子在不同深度的分布,降低15 cm处土壤溶液Ca、Mg浓度与5 cm处比值,降低幅度分别为13.50%、34.29%。文章指出大气O3浓度升高会对稻田生态系统土壤Ca、Mg元素地球化学循环产生重要影响,并可能因此影响稻米产量和品质。
Using Ozone-Free Air Concentration Enrichment (O3-FACE) experimental platform, the effect of atmospheric O3 concentration (50% higher than the surrounding atmosphere) on the contents of Ca, Mg Effect of concentration. The results showed that the increase of atmospheric O3 had no significant effect on the concentration of Ca in 0-15 cm soil layer of paddy soil, but the concentration of Mg showed a decreasing trend. The concentration of Ca and Mg in soil solution decreased 15 cm, and the decrease of Mg concentration And 20.97%, respectively. The increase of O3 concentration in the soil can change the distribution of Ca and Mg ions in the plow layer soils at different depths, and decrease the ratio of Ca and Mg concentrations to 5 cm in the soil layer at 15 cm 13.50%, 34.29%. The article points out that the increase of O3 concentration in the atmosphere will have a significant impact on the geochemical cycling of Ca and Mg elements in the paddy ecosystem, and may therefore affect the yield and quality of rice.