论文部分内容阅读
在冬暖大棚(又称日光温室)生产条件下研究了温度对番茄吸收CO_2的影响。结果表明:适宜温度可提高番茄对CO_2的吸收能力,而增加CO_2浓度,适宜温度也相应提高,CO_2800μl/L下番茄叶片的光合适温较CO_2340μl/L下高2～3℃;随光强提高,番茄对CO_2的吸收利用能力增强,CO_2浓度为800μl/L时尤为明显,表现为光补偿点显著降低,表观量子产额急剧增加,可作为CO_2施肥的经济有效浓度指标;在一定范围内,气孔导度随外界CO_2浓度的升高显著降低(r=-0.9977),但对光合速率和细胞间隙CO_2浓度的提高没有明显影响,气孔导度的降低导致蒸腾减弱,光合水分利用率提高。
The effect of temperature on the CO 2 uptake by tomato was studied under the production conditions of winter warm greenhouse (also known as sunlight greenhouse). The results showed that suitable temperature could increase the absorption capacity of CO_2 in tomato, and the appropriate temperature increased with the increase of CO_2 concentration. The optimum temperature of CO_2 at 2800μl / L was 2 ~ 3 ℃ higher than CO_ 2340μl / L. With the increase of light intensity , And the ability of tomato to absorb and utilize CO 2 was enhanced. Especially when the CO 2 concentration was 800 μl / L, the light compensation point decreased significantly and the apparent quantum yield increased sharply, which could be used as a cost-effective concentration indicator of CO 2 fertilization. Within a certain range , Stomatal conductance decreased significantly with the increase of CO 2 concentration (r = -0.9977), but had no significant effect on the photosynthetic rate and CO 2 concentration. The decrease of stomatal conductance led to the decrease of transpiration and the increase of photosynthetic water use efficiency.