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科普斯在1985年已证明,花旗松(Pseudotsuga menziesii[Mirb.],Franco)花粉在液态氮(-196℃)中贮藏1年后仍保持很高的生育力。液态氮花粉贮藏法采用的设备价格低,技术简单。在-196℃情况
Copticus demonstrated in 1985 that Pseudotsuga menziesii [Mirb.], Franco) pollen maintained high fertility after 1 year storage in liquid nitrogen (-196 ° C). The equipment used for liquid nitrogen pollen storage method is low in price and simple in technology. At -196 ℃ situation