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在大田和控制实验条件下研究的结果表明,各种霜冻,乃至对作物地上器官危害甚微的轻霜冻,对耐寒作物内部的生理一生化过程即光合成、能量、磷和氮交换过程都有负作用,霜冻对产量的各种影响就是它对这些过程的影响结果。一、霜冻对光合作用过程的影响关于低温(包括霜冻)对光合成后效的研究还处在初期发展阶段,但已确定,极端低温会减弱光合成过程。这种减弱可能是可逆的,亦有可能导致完全丧失同化能力。
The results of the field experiments and controlled experiments show that all kinds of frosts and even light frosts which have little harm to the above-ground crops have negative effects on the photosynthesis, energy, phosphorus and nitrogen exchange processes in the physiological and biochemical processes of cold-tolerant crops Various effects of frost on production are the result of its impact on these processes. Effects of frost on photosynthesis The study on the post-photosynthesis aftereffect at low temperatures (including frost) is still in its infancy, but it has been determined that extremely low temperatures can reduce photosynthesis. This decrease may be reversible and may lead to total loss of assimilation.