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在温室大棚中模拟大气CO2浓度升高(780μmol·mol-1),研究了抽薹期油菜各器官对钙、镁、硫、铁、锰、锌、钼、硼离子吸收与运输的影响.结果表明:与自然CO2浓度(对照)相比,高CO2浓度不施氮条件下,茎的中、微量元素含量除锌增加外,其他均减少,施氮条件(0.2g N·kg-1土)下钙、硫、硼、锌增加,镁、锰、钼、铁减少;叶的中、微量元素两个氮水平下都表现为除钼含量增加外,其他均下降.CO2浓度升高条件下,茎中钙和硫占中量元素总和的比值及硼和锌占微量元素总和的比值增加,镁、铁、锰、钼相应比值减少,两个氮水平下表现一致;CO2浓度升高条件不施氮处理增加了钙在叶中的分配比例,而正常供氮处理则增加了镁的分配比例,两个氮水平下均促进了锰、锌、钼在叶中的分配比例.不施氮条件下,高CO2浓度处理的运输系数SFe,Mo和SS,B高于自然CO2浓度处理,而SMg,Fe、SMg,Mn和SS,Fe低于自然CO2浓度处理,表明CO2浓度升高条件下油菜向上运输的钼和硫高于铁,硼高于硫,镁高于铁和锰;正常供氮条件下,高CO2浓度处理的SMg,Fe、SMg,Mn、SS,B高于自然CO2浓度处理,而SCa,Mg、SFe,Mo、SS,Fe相反,表明CO2浓度升高条件下油菜向上运输的钙、铁和锰高于镁,硼高于硫,铁高于钼,硫高于铁.
The effects of Ca2 +, Mg2 +, Mg2 +, S, Fe, Mn, Zn, Mo and B ions on the rapeseed organs during the bolting stage were studied by simulating the increase of CO2 concentration in the greenhouse (780μmol · mol-1) Compared with the natural CO2 concentration (control), the contents of trace and trace elements in the stems decreased except zinc under the condition of high CO2 concentration, and under the condition of nitrogen application (0.2g N · kg-1 soil) The content of calcium, sulfur, boron and zinc increased while the content of magnesium, manganese, molybdenum and iron decreased; while under the two nitrogen levels of leaf, all except the increase of molybdenum content, the others decreased.When CO2 concentration increased, The ratio of calcium and sulfur in the total amount of the middle and the ratio of boron and zinc to the total of the trace elements increased, the corresponding ratios of magnesium, iron, manganese and molybdenum decreased, and the two nitrogen levels showed the same performance; Treatment increased the distribution ratio of calcium in leaves, while the normal nitrogen supply increased the distribution ratio of magnesium, and promoted the distribution proportion of manganese, zinc and molybdenum in leaves under the two nitrogen levels.Unless the nitrogen application, The transport coefficients SFe, Mo and SS, B of high CO2 concentration treatment were higher than those of natural CO2 treatment, but SMg, Fe, SMg, Mn and SS, Fe In the natural CO2 concentration treatment, the uptake of CO2 and CO2 into rape under higher CO2 concentration was higher than that of iron and boron, and the content of boron was higher than that of sulfur and magnesium, Mg, SFe, Mo, SS and Fe, indicating that uptake of Ca2 +, Fe3 + and Mn3 + by rape were higher than those of Mg and B Higher than sulfur, iron is higher than molybdenum, sulfur is higher than iron.