Wheeler R M, Tibbitts T W, Fitzpatrick A H
NASA Biomedical Operations and Res. Office, Kennedy Space Ctr., FL 32899.
Crop Sci. 1991 Sep-Oct;31(5):1209-13. doi: 10.2135/cropsci1991.0011183x003100050026x.
Carbon dioxide concentration can exert a strong influence on plant growth, but this influence can vary depending on irradiance. To study this, potato plants (Solanum tuberosum L.) cultivars Norland', Russet Burbank', and Denali' were grown in controlled-environment rooms at different levels of CO2 and irradiance. Carbon dioxide levels were maintained either at 350 or 1000 micromoles mol-1 and applied in combination with 12- or 24-h photoperiods at 400 or 800 micromoles m-2 s-1 photosynthetic photon flux. Air temperatures and relative humidity were held constant at 16 degrees C and 70%, respectively, and plants were harvested 90 d after planting. When averaged across all cultivars, CO2 enrichment increased tuber yield and total plant dry weight by 39 and 34%, respectively, under a 12-h photoperiod at 400 micromoles m-2 s-1; 27 and 19% under 12 h at 800 micromoles m-2 s-1; 9 and 9% under 24h at 400 micromoles m-2 s-1. It decreased dry weights by 9 and 9% under 24 h at 800 micromoles m-2 s-1. Tuber yield of Denali showed the greatest increase (21%) in response to increased CO2 across all irradiance treatments, while tuber yields of Russet Burbank and Norland were increased 18 and 9%, respectively. The results show a pattern of greater plant growth from CO2 enrichment under lower PPF and a short photoperiod.
二氧化碳浓度会对植物生长产生强烈影响，但这种影响会因光照强度而异。为了研究这一点，马铃薯品种“诺兰”、“褐皮伯班克”和“德纳利”在可控环境室中，于不同的二氧化碳水平和光照强度下种植。二氧化碳水平维持在350或1000微摩尔/摩尔，并与12小时或24小时光周期相结合，光合光子通量为400或800微摩尔/平方米·秒。气温和相对湿度分别保持在16摄氏度和70%不变，种植90天后收获植株。在所有品种中进行平均计算时，在400微摩尔/平方米·秒的12小时光周期下，二氧化碳富集使块茎产量和植株总干重分别增加了39%和34%；在800微摩尔/平方米·秒的12小时光周期下，分别增加了27%和19%；在400微摩尔/平方米·秒的24小时光周期下，分别增加了9%和9%。在800微摩尔/平方米·秒的24小时光周期下，干重分别减少了9%和9%。在所有光照处理中，“德纳利”的块茎产量对二氧化碳增加的响应增幅最大（21%），而“褐皮伯班克”和“诺兰”的块茎产量分别增加了18%和9%。结果表明，在较低光合光子通量和短光周期下，二氧化碳富集使植物生长更显著。
