论文部分内容阅读
九、CO_2浓度对光合作用的影响 CO_2从大气扩散到叶绿体内的量,由总扩散阻值∑_r和大气与叶内的CO_2浓度差φ_a-φ_c所决定。日照多,光合作用强,叶内CO_2浓度下降,叶内外之浓度差就大;同样,提高大气中CO_2浓度也可以加大浓度差。后者叫CO_2施肥,在日本作为园艺设施已逐步确立。CO_2施肥的根本出发点是大气中的CO_2浓度与日照量相比较是太少了。不过,实际上并非如此简单,除CO_2外还有作物生理上的问题。
Effect of CO_2 on photosynthesis The amount of CO_2 diffused into the chloroplast from the atmosphere is determined by the total diffusion resistance Σ_r and the difference in concentration of CO_2 between atmosphere and leaf φ_a-φ_c. Sunshine and more strong photosynthesis, leaf CO 2 concentration decreased inside and outside the leaves of the concentration difference is large; the same, to enhance atmospheric CO 2 concentration can also increase the concentration difference. The latter is CO 2 fertilization, which has gradually been established as a horticultural facility in Japan. The fundamental starting point of CO 2 fertilization is that the concentration of CO 2 in the atmosphere is too small compared with the amount of sunlight. However, it is actually not so simple, there are crop physiology problems besides CO_2.