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首页> 外文期刊>Plant and Soil >COMBINED EFFECTS OF CO2 CONCENTRATION AND NUTRIENT STATUS ON THE BIOMASS PRODUCTION AND NUTRIENT UPTAKE OF BIRCH SEEDLINGS (BETULA PENDULA)
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COMBINED EFFECTS OF CO2 CONCENTRATION AND NUTRIENT STATUS ON THE BIOMASS PRODUCTION AND NUTRIENT UPTAKE OF BIRCH SEEDLINGS (BETULA PENDULA)

机译：CO2浓度和养分状况对桦树幼苗生物量生产和养分吸收的综合影响

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Birch seedlings (Betula pendula) were grown for four months in a greenhouse at three nutrient levels (fertilization of 0, 100 and 500 kg ha(-1) monthly) and at four CO2 concentrations (350, 700, 1050 and 1400 ppm). The effect of CO2 concentration on the biomass production depended on the nutrient status. When mineralization of the soil material was the only source of nutrients (0 kg ha(-1)), CO2 enhancement reduced the biomass production slightly, whereas the highest production increase occurred at a fertilization of 100 kg ha(-1), being over 100% between 350 and 700 ppm CO2. At 500 kg ha(-1) the production increase was smaller, and the production decreased beyond a CO2 concentration of 700 ppm. The CO2 concentration had a slight effect on the biomass distribution, the leaves accounting for the highest proportion at the lowest CO2 concentration (350 ppm). An increase in nutrient status led to a longer growth period and increased the nutrient concentrations in the plants, but the CO2 concentration had no effect on the growth rhythm and higher CO2 reduced the nutrient concentrations.
机译：桦树幼苗（Betula pendula）在温室中以三种营养水平（每月施肥0、100和500 kg ha（-1））和四个CO2浓度（350、700、1050和1400 ppm）生长四个月。 CO2浓度对生物量生产的影响取决于营养状况。当土壤物质的矿化是唯一的养分来源（0 kg ha（-1））时，CO2的增加会稍微降低生物量的生产，而最高的增产发生在施肥100 kg ha（-1）时，超过350至700 ppm CO2之间的100％。在500 kg ha（-1）时，产量增加较小，并且产量下降超过700 ppm的CO2浓度。 CO2浓度对生物量分布影响不大，叶片在最低CO2浓度（350 ppm）下占最大比例。养分状况的增加导致植物的生育期延长，养分浓度增加，但CO2浓度对生长节律没有影响，而更高的CO2降低了养分浓度。

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